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GPS 315/320

User Manual

WARNINGS
USE GOOD JUDGEMENT
This product is an excellent navigation aid, but does not replace the need for
careful orienteering and good judgement. Never rely solely on one device for
navigating.
USE CARE
The Global Positioning System (GPS) is operated by the U.S. Government, which is
solely responsible for the accuracy and maintenance of GPS.
The accuracy of position fixes can be affected by the periodic adjustments to GPS
satellites made by the U.S. Government and is subject to change in accordance
with the Department of Defense civil GPS user policy and the Federal
Radionavigation Plan. Accuracy can also be affected by poor satellite geometry.
USE PROPER ACCESSORIES
Use only Magellan cables and antennas; the use of non-Magellan cables and
antennas may severely degrade performance or damage the receiver, and will void
the warranty.

LICENSE AGREEMENT
Magellan grants you, the purchaser, the right to use the software supplied in and
with MAGELLAN GPS products (the "SOFTWARE") in the normal operation of the
equipment. You may make copies only for your own personal use and for use
within your organization.
The SOFTWARE is the property of MAGELLAN and/or its suppliers and is protected
by United States copyright laws and international treaty provisions; therefore, you
must treat this SOFTWARE like any other copyright material.
You may not use, copy, modify, reverse engineer or transfer this SOFTWARE
except as expressly provided in this license. All rights not expressly granted are
reserved by MAGELLAN and/or its suppliers.
* * *
No part of this handbook may be reproduced or transmitted in any form or by any
means, electronic or mechanical, including photocopying and recording, for any
purpose other than the purchaser's personal use without the prior written
permission of Magellan Corporation.
© 2000 by Magellan Corporation. All rights reserved.
Magellan™, GPS 315™, GPS 320™ and DataSend™ are trademarks of Magellan
Corporation.
630321 C

Table of Contents

Introduction ............................... 1
Conventions Used in this Manual .............. 1
GPS 315/320 Receiver ........................... 2

Getting Started .......................... 3
Receiver Accuracy ................................... 3
Installing the Batteries .............................. 3
Proper Handling - Signal Reception ........... 4
Power On .............................................. 4
Initialize ................................................. 4
Initialize for First Time Use ................. 4
Selecting Primary Usage .......................... 5
Getting a Fixed Position ........................... 6
Saving Your Waypoint ............................. 6

Basic Operation ......................... 7
Entering Information ................................ 7
Navigation Screens ................................. 7
Using the Status Screen ............................ 8
Using the Position Screen ......................... 9
Viewing the Secondary Coordinate Screen 9
Using the NAV 1 Screen ........................ 10
Customizing the NAV 1 Screen ............... 10
Using the Compass Screen ..................... 11
Customizing the Compass Screen............ 11

Using the NAV 2 Screen ........................ 12
Customizing the NAV 2 Screen ............... 12
Using the Plot Screen ............................. 13
Selecting PAN-N-SCAN ......................... 14
Setting Track History .............................. 14
Clearing Track History ........................... 14
Setting Up the Plotter ............................. 15
Setting Hide Data/Show Data ................ 16
Using the Road Screen ........................... 17
Customizing the Road Screen ................. 17
Using the Speed Screen ......................... 18
Resetting the Odometer .......................... 18
Resetting the Trip Odometer.................... 19
Setting the Speed Average ..................... 19
Using the Time Screen ........................... 20
Selecting Time Format ............................ 20
Resetting Elapsed Time ........................... 21

Reference ................................ 22
Working with Waypoints........................ 23
Creating a User Waypoint ..................... 24
Editing a User Waypoint ........................ 24
Creating/Editing/Deleting a Message in a
User Waypoint ..................................... 25
Saving Changes to a Selected Waypoint . 25
Deleting a User Waypoint ...................... 25
Finding a Non-UserWaypoint ................. 26
Sorting a Waypoint ............................... 26
Projecting a Waypoint ........................... 26
DataSend™ CD (optional) ...................... 27

Using DataSend™ .......................... 27
Working with Routes .............................. 28
Creating/Clearing a GOTO ................... 28
Creating a GOTO on the Plotter Screen ... 28
Creating a Man Over Board Route .......... 29
Creating a Backtrack Route .................... 29
Creating a Multi-Leg Route ..................... 30
Viewing/Editing a Route ................. 31
Inserting a Leg ............................... 31
Changing a Waypoint in a Route ..... 31
Adding a Waypoint at the End of
a Route ......................................... 32
Deleting a Waypoint in a Route ........ 32
Saving a Route ............................... 32
Activating/Deactivating a Route ....... 32
Reversing a Route ........................... 33
Using Plot View in a Route ............... 33
Deleting a Route ............................. 33
Working with TrackRoute........................ 34

Auxiliary Functions .................. 35
Working with Sun/Moon and Fish/Hunt .. 35
Selecting the Simulate Mode................... 36
Selecting Contrast ................................. 36
Selecting Alarm/Message ...................... 37
Accessing the Alarm/Message Menu ...... 37
Selecting Anchor Alarm ......................... 37
Selecting Arrival Alarm .......................... 38
Selecting XTE Alarm .............................. 38
Selecting Proximity Alarm ....................... 39

iii

Selecting GPS Fix Alarm ........................ 40
Viewing the Alarm/MSG Menu .............. 40
Selecting Alarm Defaults ........................ 40
Clearing Alarm Defaults ......................... 40

Customizing ............................. 41
Selecting Setup ..................................... 41
Selecting Initialize ................................. 41
Disabling NAV Screens .......................... 41
Selecting a Coordinate System ............... 42
Selecting Map Datum ............................ 43
Selecting Elevation Mode ....................... 43
Selecting Time Format ............................ 44
Selecting NAV Units .............................. 44
Selecting North Reference ...................... 44
Selecting Light Timer .............................. 45
Selecting the Beeper .............................. 45
Selecting Personalize ............................. 45
Selecting Clear Memory ........................ 46
Selecting NMEA ................................... 46
Selecting Baud Rate............................... 47
Connecting to DGPS .............................. 48

Troubleshooting ....................... 49
Commonly Asked Questions ................... 50
Contacting Magellan ............................. 51
Shipping Your Receiver .......................... 51

NMEA Data Messages .............. 52

Available Datums .................... 58
Specifications ........................... 59
Attaching the Wrist Lanyard ..... 60
Accessories .............................. 61
Glossary .................................. 62
Index....................................... 66

Introduction
Congratulations on your purchase of the Magellan GPS 315/GPS 320
receiver. Since introducing the world’s first commercial, hand-held GPS
receiver in 1989, Magellan has led the way with innovative GPS
products to meet a wide range of positioning and navigation needs.
The receiver is designed to get you out into the “Great Outdoors”
rather than spending hours reading the user’s manual. In order to get
you outdoors quickly, the manual is designed with key sequences rather
than wordy sentences.
Before you begin, make sure that your package includes the items listed
on the box. If any of these items are missing, please contact your local
Magellan dealer or distributor.

Conventions Used in this Manual
The manual is divided into chapters: Introduction, Getting Started, Basic
Operation, Reference, Customizing, Troubleshooting and Glossary. There
are also subchapters that describe NMEA, Datums and Accessories.
It is very important that you read through the Getting Started chapter
first as it prepares your receiver for use and provides basic instruction.
The Basic Operation chapter describes the features found in your
receiver including step-by-step instructions on their use.
The Reference section contains information to help you navigate using
waypoints, routes and auxiliary functions. Following is the Customizing
chapter, that allows you to establish options you want set in the receiver.
The Troubleshooting chapter gives you a problem and answer series to
guide you. The final chapter, Glossary, defines terms that may be
unfamiliar to you.
The manual is to be used with either the GPS 315 or the GPS 320.
These differ in that the GPS 315 has a database of worldwide cities
consisting of major, large and medium cities. The GPS 320 has a
database of worldwide cities as well as lighthouses, fixed navaids, buoys,
large and medium cities for three different regions of the world (North/
Central/South America, Europe/Africa and Australia/Asia).

Magellan GPS 315/GPS 320

GPS 315/320 Receiver
Quadrifilar antenna

The QUIT key cancels
the operation of the last
key press and can be
used to back through
the NAV screens.

The NAV key accesses
the navigation screens.

The MARK key
creates waypoints
and stores the
current position.

The ENTER
key confirms
data entries or
menu selections.

The GOTO key
creates a direct
route to any
waypoint stored in
memory.

The MENU accesses
waypoint, route and
setup functions.

The LIGHT key turns
the light on and off.

The ARROWs enter
information and scroll
through menus.

The PWR key turns the
receiver on and off.

Magellan GPS 315/GPS 320

Getting Started
This section shows you how to use your receiver for the first time and
explains:
•

Accuracy

•
•
•

Battery Installation
Primary Usage
Getting a Fixed Position

Receiver Accuracy
The satellite constellation that provides the GPS information used by
the receiver is maintained by the Department of Defense (DoD). GPS
positioning, for general use, provides 25 meter RMS accuracy or better.
Since the signals generated by these satellites are publicly accessible, the
DoD has introduced errors in the satellite signals for security reasons.
These errors are referred to as Selective Availability (SA).
At present, your GPS position will be accurate within 100 meters
horizontally and 150 meters vertically. Due to these errors introduced
by SA, it is possible to get readings outside of these values at times.

Installing the Batteries
The receiver uses two AA batteries that are installed at the back. To
remove the battery cover, turn the ring of the battery door screw
counter-clockwise until the battery
cover can be removed.
Insert the new batteries as shown, being
sure to respect the polarities, and replace
the cover.

Replace the screw and turn the ring
clockwise until the battery door is held
in place securely. Avoid overtightening
the battery door screw.
Once the batteries have been removed,
the receiver loses time and date after 20 minutes.
Magellan GPS 315/GPS 320

Proper Handling - Signal Reception
Clear View of the Sky. Because the receiver attains information it needs
from satellites orbiting the earth, the antenna needs to have a relatively
unobstructed view of the sky. This allows the receiver to choose from
all satellites currently available.
If the view of the sky is poor, (large cliffs or buildings, heavy foliage or
other obstructions) the satellite signals can be blocked and the receiver
may take longer to compute a position fix.
Holding the Receiver. The receiver is designed to fit comfortably in
your hand. Hold the receiver in the palm of your hand with the antenna
pointing towards the sky.

Power On
PWR

If after powering the receiver on, you do not press ENTER within 10
seconds, the receiver will shut off automatically.

Initialize
You do not need to initialize your receiver each time you use it unless the
memory has been cleared or if it has been transported more than 300 miles
while turned off.
Initialize for First Time Use
If the Initialize screen does not appear, then the receiver has already
been initialized. The other steps in this procedure are not required.
Select
ENTER
language

PWR

Select
area
Enter
time

ENTER

INITIALIZE
screen

Enter *
elevation
Enter
date

Select
region

ENTER

* If you do not know your elevation, press
4

ENTER

Magellan GPS 315/GPS 320

Selecting Primary Usage
A screen will be displayed asking your primary use for your receiver,
MARINE or LAND. The default is MARINE.
ENTER

You have completed the Initialization. The STATUS screen will appear
on your receiver.
The following chart shows the terminology that your receiver uses
while in land or marine mode. For purposes of this manual, it will be
assumed that the receiver is in the marine mode.

Land

Marine

Speed

SPD

SOG

Bearing

BRG

Distance

DST

Heading

HDG

COG

Velocity Made Good

VMG

Course To Steer

CTS

Estimated Time of Arrival

ETA

Time To Go

TTG

ETE

Cross Track Error

XTE

Recorded Position

Landmark

Waypoint

Units of Measure

MILES/MPH

NM/KNOTS

or KM/KPH

Magellan GPS 315/GPS 320

Getting a Fixed Position
Now you should go outside in an area where you can get a clear view of
the sky. The receiver will begin acquiring data from the satellites in
view and will display the progress on the STATUS screen. Once the
receiver has computed a fixed position, the POSITION screen will be
displayed.

Saving Your Waypoint
Once the receiver has computed your current position, you may save
(MARK) this position as a waypoint.
Saving Your Position with a Receiver-Created
Name.
This is a fast way to save your position.
MARK

MARK

Saving Your Position with a User-Created Name.
MARK

ENTER

Enter
data

MARK

You can save up to 500 waypoints in your receiver and refer back to
them at any time.
Creating a GOTO
A GOTO is a route that guides you from your current position to any
waypoint in the receiver’s memory.

GOTO

Select
category

ENTER

Select
waypoint

ENTER

This completes the Getting Started section.
The following Basic Operation section will familiarize
you with the NAV screens and more detailed
functions.
6

Magellan GPS 315/GPS 320

Basic Operation
Entering Information
Throughout this user manual there are some key presses that will be
used often, so please keep them in mind while setting up and navigating. When entering data...
• Use the

for making selections and moving up or down.

• Use the

to move the cursor to the left or right and page

through menus.
• Press

QUIT

to return to the previous screen and to exit a

screen or end a process.

Navigation Screens
The nine NAV (Navigation) screens (STATUS, POSITION, NAV 1,
COMPASS, NAV 2, PLOT, ROAD, SPEED and TIME) provide you
with necessary information you will need to use the receiver as a
navigational tool.
NAV screens can be viewed by pressing

NAV

viewing any NAV screen, you can use the
through the sequence of NAV screens.

NAV

from any screen. While
or

QUIT

to step

All screens, except STATUS and POSITION screens, can be disabled by
turning them off in the NAV SCREENS portion of SETUP. The
TIME screen default is off and can be turned on in SETUP as well.

Magellan GPS 315/GPS 320

Using the Status Screen
The STATUS screen gives you the general well-being of your
receiver by showing you satellite status, signal strengths and
battery life.
Once the
receiver has
computed a
fixed position,
the STATUS
screen will be
replaced by the
POSITION
screen.

Pic
Satellite
Positions

STATUS
12

Satellite Position
Graph

25
7

Satellite
Signal Chart
001112
782385

Satellite
Numbers

The Battery Life
Indicator was
designed to be
used with AA
alkaline batteries.
With AA lithium
batteries, you will
have more battery
life available than
shown on the
Battery Life
Indicator.

POWER

Satellite Positions
Where the satellite is
located relative to your
position.
Satellite Numbers
Identifies the satellite
shown on the chart and
on the Satellite Position
Graph.
Battery Life Indicator Shows approximate
remaining battery life for
batteries in the receiver.
Satellite Signal
Chart Displays satellite
signal strengths shown in

Battery Life
Indicator

gray for weak signals and
black for strong signal.
When the receiver first
tracks a satellite, the
strength bar will not be
solid until ephemeris is
collected. This takes about
30 seconds if uninterrupted.
Satellite Position
Graph The two circles
indicate satellite elevation,
the outer circle represents
the horizon and the inner
circle represents 45ß from
the horizon. The center of
the circle is 90ß.

Magellan GPS 315/GPS 320

Using the Position Screen
The POSITION screen displays the coordinates of your last
computed position and basic navigation data. You also have
the option of viewing your position using another coordinate system.

POSITION

Elevation
Date
Speed

Compass

34˚06.52N
117˚49.56W

ELEV 900 FT
11:23:35 PM
23JAN97
EPE 112 FT
SPEED TRIP
5 . 3 8 KT
2 3 8 . 8 NM

Position
Coordinates
Time
Estimated
Position Error

COURSE 150° M

Distance
Traveled

120 150

Course

Position Icon

Position Icon Your
current position on the
compass.
Estimated Position
Error May display the
estimated position error
value or DGPS if DGPS is
being fed to receiver, or
Simulate if simulate is on.

When you are
stationary, the
receiver begins the
averaging mode.
While averaging,
the receiver
continuously
takes fixes to
create an average.
Once you begin
moving, averaging
stops automatically.

Second
Coordinate
System access

Second Coordinate System
Access Displays
your present position in
a secondary coordinate system. Datums
can be selected under
SETUP.

Viewing the Secondary Coordinate Screen
From the POSITION screen, use the left/right ARROWs to
view the Second Coordinate System access screen.

Magellan GPS 315/GPS 320

Using the NAV 1 Screen
The NAV 1 screen displays your destination along with four
customizable navigation data and a graphical compass.
Ideally, when you
are navigating, the
Position Icon and
the Destination
Icon should line
up, one above the
other.

When the bearing
to your destination cannot be
displayed within
the compass, an
arrow will be
displayed to
indicate the
steering direction
you should be
traveling.

Destination
Name

TO: FISH

Destination
Icon

DST 50.2 mn
K
SOG 8.2T
n
XTE 3.80m R
K
VMG 7.2 T
BRG 127m°

Compass

120 150

COG

Customizable
Navigation
Data

Position Icon

150 °m

Customizable
Navigation Data You
can change the four
navigational fields. You
can choose from BRG,
DST, SOG, COG, VMG,
CTS, ETA, ETE, XTE,
TRN, ALT, TME and
blank.

Destination Icon This
icon represents where you
want to go.

CUSTOMIZE
WPT NAMES
BRG
OFF 027°m
DST
ON 50.2nm
SOG 8.2KT
COG 056°m
VMG 7.2KT
CTS 028°m
ETA 01:09P
ETE 02H24M
XTE L.2nm
TRN L26°
ALT 83 FT
TME 01:09P
BLANK

Customizing the NAV 1 Screen
The NAV 1 screen can be changed to show the navigation
data that you prefer to view.
From NAV 1
screen

ENTER

FIG.

Select
CUSTOMIZE

ENTER

Select
data type ENTER

Choose
field

QUIT

Figure A. Select
the data field to
appear on the
NAV 1 screen.

Magellan GPS 315/GPS 320

Using the Compass Screen
As well as displaying the customizable navigation data, the
COMPASS screen provides a pointer compass to help you
reach your destination.

Destination
Name

When the COG
Indicator and the
Steering Indicator
point in the same
direction, you are
on course.

TO: HOME

BRG

DST m

127°m

3.52 I

COG

SOGm

156°m
COG Indicator
N

Moon Icon

2.7 H

Compass
E

+
W

Sun Icon

Steering
Indicator
Destination
Icon

COG Indicator Displays
direction you are traveling.
The COG indicator always
points up and the compass
rotates according to the COG.

Steering Indicator
Displays the bearing of
the destination relative
to the course over
ground.
Destination Icon
Shows the general
direction you should be
traveling.

Customizing the Compass Screen
The COMPASS screen can be changed to show the navigation data that you prefer to view.
From COMPASS
MENU
screen
Choose
ENTER
field

Magellan GPS 315/GPS 320

Select
CUSTOMIZE
FIG.

ENTER

Change
ENTER
field

QUIT

The
NorthFinder™
feature displays
sun and moon
icons, above the
horizon, for you
to determine the
direction of north
and your
destination. Align
the sun on the
COMPASS screen
with the sun in
the sky. When
aligned, the
Steering Indicator
will point you in
the direction you
should travel to
reach your
destination.
CUSTOMIZE
WPT NAMES
BRG ---°m
DST ---nm
SOG ---KT
COG ---°m
VMG ---KT
CTS ---°m
BLANK

Figure B. Select
the data field to
appear on the
COMPASS
screen.

Using the NAV 2 Screen
The NAV 2 screen displays four customizable navigation
data. The NAV 2 screen is designed to help you see the
screen when your receiver is mounted at a distance from
you.

Destination
Name

TO: CAMP

14.2˚M
171˚M
SOG
11.2 KT
DST
50.2NM
BRG

COG

CUSTOMIZE
WPT NAMES
BRG
OFF 027°m
DST
ON 50.2nm
SOG 8.2KT
COG 056°m
VMG 7.2KT
CTS 028°m
ETA 01:09P
ETE 02H24M
XTE L.2nm
TRN L26°
ALT 83 FT
TME 01:09P
BLANK

Figure A. Select the
data field to appear
on the NAV 2
screen.

Customizable
Navigation
Data

VMG, CTS, ETA, ETE,
XTE, TRN, ALT, TME and
blank.

Customizable
Navigation Data.
You can change the
four navigational data
fields. You can
choose from BRG,
DST, SOG, COG,

Customizing the NAV 2 Screen
The NAV 2 screen can be changed to show the
navigation data that you prefer to view.
From NAV 2
screen
Choose
field

ENTER

Select
CUSTOMIZE
FIG.

ENTER

Change
ENTER
field

QUIT

Magellan GPS 315/GPS 320

Using the Plot Screen
The PLOT screen is a mini map that shows where you have
traveled and where you want to travel. You can view the
active route, your current position and the other waypoints
and destination in the PLOT screen.
Destination
Name
Bearing to
Destination

Destination Icon

TO: FISH

BRG

DST m

351°m 3.52 I

North Indicator

FISH

FISH 2
DOCK

Active Route

BUOY

HOME

2.0

Distance to
Destination

Waypoint Icon
Current Position
Icon
Track History

m
I

Plot Scale
Active Route
Indicates the direction
required to reach your
destination.
Plot Scale Can be
changed by using the
left/right arrows. The
scale ranges from .1 to
200 miles.

Magellan GPS 315/GPS 320

Track History
Automatically records
where you have been.

PAN-N-SCAN, an
additional feature,
allows you to scroll
through the PLOT
screen enabling you
to create waypoints
and GOTOs.

Selecting PAN-N-SCAN
By using PAN-N-SCAN, you can look ahead or review
where you have traveled according to waypoints, routes and
track history.
From PLOT
screen

Select
PAN-N-SCAN

ENTER

The ARROWs can be used to move the cursor. If the cursor
is over the waypoint icon when MENU is pressed, the menu
will be displayed with WPT INFO added. Moving the
cursor over a waypoint brings up the name, bearing and
distance. Pressing MENU and selecting WPT INFO
displays full information.
In PAN-N-SCAN mode, you can zoom in by pressing the
ENTER key. Once the lowest scale is reached (0.1 mile),
pressing ENTER zooms out to the highest scale (200 miles).
Setting Track History
Using TRACK HISTORY records where you have been by
automatically storing locations, as “dropping bread crumbs”
from your starting point as you travel. This is useful when
you want to return to your starting point.
From PLOT
screen

Change
field

Select
TRACK HIST

ENTER

Clearing Track History
From PLOT
screen

Select

Select
CLR TRACK

ENTER

Magellan GPS 315/GPS 320

WPT
ORIENT
NAMES

Setting Up the Plotter
This menu allows you to change the orientation, turn the
plot rings on or off, set the course projection and set the
plotter scale.
Setting Plotter Orientation.
From PLOT
screen

Select
PLOT SETUP

Select
ORIENTATION

ENTER

FIG.

ENTER

Select
ENTER
orientation

Turning Plot Rings On or Off. You may want to estimate
the distance to a point on the plotter. To assist you, turn the
PLOT RINGS option on. The distance between each plot
ring is equal to the scale, therefore, at most you will see a
portion of 2 rings at one time.
From PLOT
screen
Select
PLOT RINGS

Select
PLOT SETUP

ENTER

Select
ENTER
on or off

Select
COURSEPROJ

Select
PLOT SETUP

ENTER

FIG.

Figure A. You
can choose from
TRACK UP
(direction you
are moving at the
top of the
screen),
COURSE UP
(destination of
the current leg at
the top of the
screen) and
NORTH UP
(north at the top
of the screen).

ENTER

PROJECTION
WPT NAMES

Setting Up Course Projection. You may want to know
where you will be after a specified period of time based on
your current speed and heading.
From PLOT
screen

OFF
TRACK
UP
ON
COURSE
UP
NORTH UP

ENTER

Select
time

ENTER

OFF
1ON
MINUTE
2 MINUTES
5 MINUTES
10 MINUTES

Figure B. You
can choose
from OFF, 1, 2,
5 and 10
minutes.

A solid black line will appear starting from your position
to the projected position.

Magellan GPS 315/GPS 320

Setting Up Plot Scales. You can set up the maximum scales
at which the waypoints appear on the plotter screen.
WPT NAMES
PLOT
SCALES
OFF
ON

0.1
0.2
0.3
0.5
0.8
1
2
3
5
8
10
20
50
100
200

Figure A. You may
select the scale for
the waypoint to
appear on the
plotter. The
number you select
is the maximum
scale in which the
icon will appear.

From PLOT
screen

Select
category
FIG.

Select
PLOT SETUP ENTER

ENTER

Select

ENTER

Select *
ENTER
scale

* Selecting OFF will turn the scales off. If you select either
ICONS ONLY or ICONS/NAMES, you will be prompted
to change the plot scales for a waypoint.

Setting Hide Data/Show Data
You may want bearing and distance to be hidden. You can
choose to either hide these navigation data fields or have the
fields present. Under HIDE DATA/SHOW DATA, you
can turn these fields on or off.
From PLOT
screen

Select
HIDE DATA
or
SHOW DATA

ENTER

Depending on
which has been
selected previously,
you may need to
select SHOW
DATA to bring the
fields into view.

Magellan GPS 315/GPS 320

Using the Road Screen
The ROAD screen displays four customizable navigation
data fields, at the top of the screen, and shows your
position on the desired route.

Destination
Name

TO: FISH

BRG

DST

COG

SOG

Customizable
Navigation
Data

127m° 3.52 mn
156°m 2.7 KT

Destination
Icon
Desired
Route
Position
Icon
Navigation Data
You can change the four
navigation data fields.
You can choose from
BRG, DST, SOG, COG,
VMG, CTS and blank.

When the
destination icon
is straight ahead,
you are on
course. If you are
off course and
the destination
icon is off the
screen, an arrow
will appear to
point you in the
direction to get
back on course.

Desired Route The
direction to travel to
reach your destination.

CUSTOMIZE
WPT NAMES

Customizing the Road Screen
The ROAD screen can be changed to show the navigation
data that you prefer to view.
From ROAD MENU
screen

Select
CUSTOMIZE

Choose ENTER
field

Magellan GPS 315/GPS 320

FIG.

BRG ---°m
DST ---nm
SOG ---KT
COG ---°m
VMG ---KT
CTS ---°m
BLANK

ENTER

Choose ENTER
field

QUIT

Figure B. You can
choose from BRG,
DST, SOG, COG,
VMG, CTS and
blank.

Using the Speed Screen
While using the SPEED screen, you can view the
graphical speedometer, odometer and trip odometer as
well as the numerical bearing, course over ground and
speed over ground.

Destination
Name

TO: CAMP

COG

BRG

056°°mm

027°m
Navigation
Data

10
5 15
0
20

SOG 14.2

K
T

Average
Speed Icon
Instantaneous
Speed
Graphical
Speedometer

ODOMETER

Odometer

0 5 4 3 mn

Trip
Odometer

0 0 5 4 2 3 mn
TRIP

Graphical Speedometer Scale can be
increased or decreased
by using the right/left
arrows.

Instantaneous Speed
A graphical representation
of speed over ground
(SOG).

WARNING
RESET
ODOMETER
TO 000?
YES
NO

Figure A. Select
“Yes” to reset the
odometer.

Resetting the Odometer
You may want to reset the Odometer field to zero.
From SPEED
screen
Select
yes or no

Select
ODOM RESET

ENTER

FIG.

ENTER

Magellan GPS 315/GPS 320

Resetting the Trip Odometer
You may want to reset the Trip field to zero.
From SPEED
screen

Select
TRIP RESET

ENTER

Select
ENTER
yes or no

Setting the Speed Average
You may want to reset the Speed Average field in your
receiver.
From SPEED
screen
FIG.

Select
SPEED AVG

Select
time

ENTER

The default is 30 seconds.

ENTER
SPEED AVG
TRIP
5 SECONDS
30 SECONDS
1 MINUTE
5 MINUTES
1 HOUR

Figure B. You can
set the timing for
Speed Averaging.
You can choose
from TRIP, 5, 30
seconds, 1, 5
minutes or 1 hour.
TRIP option is for
averaging speed over
the entire trip.

Magellan GPS 315/GPS 320

Using the Time Screen

The default for
the TIME screen
is off.

The TIME screen displays the current time, estimated
time enroute, time of arrival, and elapsed time in regards
to the route you are navigating in.
TIME

All data shown
on the TIME
screen applies to
the route you are
navigating in.

03:54:21PM

Time

ETE

Estimated
Time
Enroute

01:09:24
OF ARRIVAL

04:34:20PM

Time of
Arrival

ELAPSED

Elapsed
Time

02:24:56

Time Can be customized to correct the
current time and to select
the time format.

Time of Arrival (OF
ARRIVAL)
Elapsed Time
(ELAPSED)

Estimated Time
Enroute (ETE)

Selecting Time Format
You may need to correct the current time or change the
time format.
From TIME
screen

Select
FORMAT

ENTER

TIME FORMAT
LOCAL 24HR
LOCAL AM/PM
UTC

Figure A. You can
choose from
LOCAL 24HR,
LOCAL AM/PM
and UTC.

FIG.

Select
format

If LOCAL 24HR or
LOCAL AM/PM

ENTER

Change ENTER
fields

If UTM is chosen you will not be prompted to make the
time change.

Magellan GPS 315/GPS 320

Resetting Elapsed Time
You may want to reset the elapsed time to zero.
From TIME
screen

Select
RESET ELAP

ENTER

You have completed the basic operation for
your receiver. From the information provided, you can now navigate from place to
place quickly and easily.
The following chapters provide you with
additional information on using your receiver
that build on what you have learned.

Magellan GPS 315/GPS 320

Reference
The Reference section contains information that will help
you navigate using your receiver. Now that you have read
the Basic Operation section, you have reviewed the basic
usage. The Reference section will cover waypoints, routes,
and auxiliary functions.
The Working with Waypoints section tells you how to
create, edit, delete, project and sort waypoints. These
functions will guide you in the uses of waypoints. You can
create your own waypoints (known as User waypoints) or
use the waypoints already in the receiver’s memory (NonUser waypoints). You can store up to 500 user positions
which can be used to build routes for navigation.
As stated earlier in the user manual, the GPS 315 has a
database of worldwide cities and the GPS 320 has a
database of cities and marine navaids for three different
regions of the world: North/Central/South America,
Europe/Africa and Australia/Asia.
The Working with Routes section tells you of the four
different types of routes consisting of GOTO, BACKTRACK, MOB and MULTI-LEG ROUTE. A route is a
planned course of travel defined by a series of waypoints
saved in the receiver’s memory. The receiver holds 20
routes with 30 legs. The route function allows you to
create, activate/deactivate, view/edit or delete any one of
the 20 routes.
The Auxiliary Function section tells you how to select the
Sun/Moon and Fish/Hunt options, contrast, simulate
mode and the alarms and message functions. You can
choose from the Anchor alarm, Arrival alarm, XTE alarm,
Proximity alarm and GPS Fix alarm. These alarms can be
reset to the alarm default settings or can be cleared of
defaults.
Following, you will find the Customizing section. Customizing allows you to use the Setup menu to establish
the options you would like to set in your receiver.

Magellan GPS 315/GPS 320

Working with Waypoints
This section tells you how to edit, delete, project and sort
waypoints. You can store up to 500 user positions which
can be used to build routes for navigation.
Waypoints consist of two types, User and Non-User. The
User types are made up of waypoints that you can save in
the receiver’s memory. You can edit and delete these
waypoints, if you wish. The Non-User types display
locations, their coordinates and a description. These are
permanently stored in the receiver’s memory and cannot be
deleted unless written over by waypoints downloaded from
the DataSend™ CD.

You can store up to
10 Non-User
waypoint categories.

To help you understand the difference, the chart below
shows the functions of the User and Non-User waypoints.
WPT Types

Available Functions

User

•
•
•
•
•

Create
Edit
Delete
Project
Sort

Non-User

• Find
• Project
• Sort

The chart below shows the differences between the GPS 315
and GPS 320.
GPS 315

GPS 320

Worldwide major
cities

Worldwide large
and medium
cities

Regional large and
medium cities

Magellan GPS 315/GPS 320

Regional buoys,
lighthouses and
fixed navaids

As you are working with waypoints, you will notice that the
cities (non-user waypoints) are divided into categories. This
division is based on the population of the city using the
following guidelines:
Major city
Large city
Medium city
Small city *

500,000+
100,000 – 500,000
20,000 – 100,000
Less than 20,000

* available in DataSend CD.
MENU
EDIT WPT
SORT WPT
DELETE WPT
PROJECTION
WAYPOINTS
ROUTES
SETUP
SUN/MOON
FISH/HUNT
CONTRAST
ALARM/MSG

Figure A. This menu
allows you to select
the edit waypoint
mode. Only User
waypoints can be
edited.

EDIT WPT
WPT003
34˚06.56N
117˚49.60W
900FT
11:23:35PM
12JUN97
NO CAMP
FIRES

Creating a User Waypoint
A waypoint is a recorded position that can be used in a route
or a GOTO. You can save up to 500 user waypoints in your
receiver. You can create a waypoint with a receiver-generated
name (WPT001, WPT002, WPTxxx) by pressing:
MARK

MARK

To create a waypoint with a name of your choice or if you wish
to change any data field while entering a waypoint, use the
following:
MARK

Select
ENTER
data field

Make
changes

ENTER

MARK

Editing a User Waypoint
Editing a Selected Waypoint
From any
NAV screen

ENTER

Select
WAYPOINTS

Select
waypoint

Select User
category

ENTER

Select
EDIT WPT

FIG.

ENTER

SAVE EDITS
CLEAR MSG

Figure B. You may
change any of the
data fields in this
screen.

Editing Waypoint Fields. Follow the instructions on
selecting a waypoint and use the following to edit the
desired fields.
FIG.

Select
data field

ENTER

Make
changes

ENTER

Magellan GPS 315/GPS 320

To create a message. Follow the instructions on selecting a
waypoint and use the following to create/edit/delete a
waypoint.
Select
ENTER
CREATE MSG

Make
changes

ENTER

EDIT WPT
CAMP
34˚06.56N
117˚49.60W
900 FT
11:23:35PM
12JUN97
CREATE MSG

To delete a message. Follow the instructions on selecting
a waypoint.
Select
CLEAR MSG

ENTER

To save your edits. Follow the instructions on selecting a
waypoint.
Select
SAVE EDITS

FIG.

SAVE EDITS

Figure C. Once
you have made
your changes, be
sure to select
SAVE EDITS.

ENTER

Deleting a User Waypoint
You may find that you have saved waypoints that you no
longer use. If so, you can delete these unnecessary
waypoints.

DELETE
DELETE
WPT023?
YES
NO

Once these waypoints are deleted, you cannot
undo this process or retrieve these deleted
waypoints.

From any
NAV screen

Select
WAYPOINTS

Select
ENTER
category
Select
DELETE WPT

ENTER

Magellan GPS 315/GPS 320

ENTER

Select
waypoint
FIG.

Figure D. This
screen prompts
you to select YES
or NO in
deleting the
waypoint named.

Select
ENTER
yes or no

To find the
waypoint use the
ARROWs to
change the letters.
For example, to
find Dodger
Stadium, use the
ARROWs to
change the first
letter to “D”.
Then use the
ARROWs to find
the second letter,
“O”. Continue
until the name is
found.
WPT SORT
ALPHABETIC
NEAREST
ICON/NAME

Figure A. You can
choose from
ALPHABETIC
(shows all
waypoints),
NEAREST
(shows closest 20
waypoints) and
ICON/NAME
(cannot sort NonUser waypoints).

Finding a Non-User Waypoint
To simplify your search for a waypoint, you can find it using
the smart scroll function.
From any
NAV screen

Select
FIND

Find
waypoint

ENTER

Sorting a Waypoint
You may want to change how the waypoints are sorted.
From any
NAV screen
ENTER

Select

Select
WAYPOINTS

Select
SORT WPT

Select
category

ENTER

FIG.

ENTER

Projecting a Waypoint
This function allows you to create a waypoint at a certain
distance and direction from an existing waypoint.

ENTER

Select
ENTER
WAYPOINTS

Select
ENTER
category

From any
NAV screen

In the G.C. (Great
Circle) BRG/DST
field, you can
input the bearing
and distance into
the data fields in
order to compute
the projection.
You can also input
information into
the coordinate
fields.

Select
field

Select
WAYPOINTS

Select
waypoint

ENTER

Select
category
Select
PROJECT

ENTER

Make
changes ENTER MARK

You can change any of the three sections in the PROJECTION screen. Once you have the necessary information in
the data fields and the receiver has projected the position,
you can save the position by pressing MARK .

Magellan GPS 315/GPS 320

DataSend™ CD (optional)
DataSend™ software contains a database of waypoints that
can be sent to your receiver and are broken down into
multiple categories. The software allows you to select a
geographical area and enable waypoint categories for that
location to be transferred into the receiver.

Using DataSend™
After you have installed DataSend™ you are ready to view
and send waypoints to the receiver. While running
DataSend™ you will see a background map of the world
that you can zoom in to see enabled waypoints.
If you want to send waypoints to your receiver, you must
select the geographic area first, then from the waypoint list
you can make your selection of waypoints to send. The
software will compute the amount of memory required and
whether your selection fits into your receiver. If it exceeds
the available receiver memory, either the geographic area, list
of waypoints selected, or both, can be decreased and the
memory requirements recomputed. The list of waypoints
selected in the specified geographic area can then be saved
under a project name you enter.
You can then send the waypoints to the receiver which
replace all waypoints in the receiver. The default waypoints
that came with the receiver can be restored at any time.

Magellan GPS 315/GPS 320

Don’t worry about
losing the
waypoints that
came with the
receiver, they are
available on the
CD for retransmission to the
receiver.

Working with Routes
Creating/Clearing a GOTO
A GOTO is a route that guides you from your current
position to any waypoint in the receiver’s memory. As an
example, you can save a waypoint at your home. No matter
where you go, you will always be able to navigate back home
by using GOTO.
To create a GOTO
GOTO
MOB
USER
STADIUM
GOLF COURSE
HALL

Figure A. Your
menu may differ
depending the
waypoints in
memory.

GOTO

FIG.

Select
category

Select
waypoint

ENTER

To clear a GOTO. The CLEAR GOTO function allows
you to delete an active GOTO route.
GOTO

Select
ENTER
CLEAR GOTO

If there are no active GOTOs, the CLEAR
GOTO will not be displayed in the MENU.

Creating GOTO on the Plotter Screen
A GOTO route can be created by selecting a waypoint on
the plotter screen. While on the plotter screen, follow this
procedure to access PAN-N-SCAN and set a GOTO by:
By selecting the
GOTO destination
waypoint from the
plotter screen, you
can avoid selecting
the wrong
waypoint if its
name is shared
with another
waypoint.

From PLOT
screen
Move
crosshair

Select
PAN-N-SCAN

GOTO

ENTER

Select
yes or no

ENTER

When the crosshair is over the waypoint icon, the
waypoint name is displayed at the top of the screen.

Magellan GPS 315/GPS 320

Creating a Man Over Board (MOB) Route
Another type of route is a Man Over Board (MOB).
The MOB route is useful when you want to instantly
create and activate a route to the last computed
position.
Select
MOB

GOTO

ENTER

MOB waypoints will be created and titled MOB001,
MOB002 and so on. If a MOB already exists, the receiver
will give you the option of replacing the MOB.
To clear a MOB. The CLEAR MOB function allows you to
delete an active MOB route.
While in MOB
screen

Select
CLEAR MOB

ENTER

Creating a Backtrack Route
Backtrack creates a route that starts from the last point
recorded in track history using the “bread crumbs” saved, to
the first point recorded for track history. By following this
route, you “retrace your steps” back to the starting point.

Select
ROUTES

Select
BACKTRACK

ENTER

A route will be created and given a name in the format of
BXXPxx. XX is the BACKTRACK number and xx is the
waypoint number ranging from 01 to 31. For example,
your first backtrack will read B01P01. The backtrack
waypoints will be listed in the menu just as other waypoints.

Magellan GPS 315/GPS 320

Creating a Multi-Leg Route
CREATE

SAVE ROUTE

You may want to create a route with your saved
waypoints. For example, if you want to create a route
from your home, to a campsite and then to a favorite
fishing spot, you can create a route that would take you
to each place.

LEG

BRG

DST

˚m

n
m

Figure A.
Highlight the first
dotted line to
place the first
waypoint in the
multi-leg route.

MENU
INSERT
SAVE ROUTE
WAYPOINTS
ROUTES
SETUP
SUN/MOON
FISH/HUNT
CONTRAST
ALARM/MSG

Figure B. Use this
menu as an option
for saving your
route.

ENTER

Select
ROUTES
FIG.

Select
waypoint

Select
empty route

ENTER

Select *
category

ENTER

* You can combine waypoints of different categories in the
same route.
The receiver will display the selected waypoint in the
starting location and will highlight the destination for leg 2.
Press ENTER for your next selection. Continue this process
until you have completed the route.
To end the creation process:
Select SAVE
ROUTE

ENTER

or
MENU

Select
SAVE ROUTE

FIG.

ENTER

When selecting a navaid for a route, be sure
you are selecting the correct one because
there may be navaids with the same names
in different parts of the world.

Magellan GPS 315/GPS 320

Viewing/Editing a Route
MENU

Select
ROUTES

Select
VIEW/EDIT

Select route
to edit

ENTER
FIG.

ENTER

Inserting a Leg. With the route you have created, from
your home to a campsite, you can insert a leg in the
route. For example, on your way to the campsite, you
find a stream that you want to stop at on your way back.
You can add the waypoint for the stream to your route.
While viewing
route
Select
INSERT

FIG.

Figure C. To view
or edit a route,
highlight View/
Edit.

Select
waypoint MENU

Select
category

ENTER

Select
waypoint

ACTIVATE
VIEW/EDIT
REVERSE
DELETE
BACKTRACK
PLOT VIEW
WAYPOINTS
ROUTES
SETUP
SUN/MOON
FISH/HUNT
CONTRAST
ALARM/MSG

VIEW/EDIT

ENTER

HOME
CAMP

ENTER
SAVE ROUTE

Changing a Waypoint in a Route. Using your home to
campsite route, you want to go to the fishing spot on
the way to the campsite and not stop at the stream.
You can replace the stream waypoint with the fishing
spot.
While viewing
route
Select
category

Select
waypoint
ENTER

ENTER

Select
waypoint

ENTER

Select
waypoint

ENTER

LEG

BRG
30˚m

DST
10 MI

Figure D. You
can add to an
already existing
route by
highlighting the
next available
dotted line.

or
MENU

Select
REPLACE

Select
category

Magellan GPS 315/GPS 320

ENTER

VIEW/EDIT
HOME
CAMP

SAVE ROUTE

Adding a Waypoint at the End of a Route. You may be
navigating using the home to campsite route and find a
great picnic spot. You would want to add this to the end of
your route.
While viewing
route

Select first
dotted line

ENTER

Select
category

LEG

BRG
30˚m

DST
10 MI

Figure A.
Highlight the
waypoint you
want deleted.

Select
waypoint

ENTER

Deleting a Waypoint in a Route. On your next trip
navigating from the home to campsite route, you find the
campsite has closed. You may want to delete the campsite
leg from your route.

MENU
INSERT
DELETE
REPLACE
SAVE ROUTE
WAYPOINTS
ROUTES
SETUP
SUN/MOON
FISH/HUNT
CONTRAST
ALARM/MSG

Figure B. Use
this menu as an
option for
saving the
changes made to
your route.

While viewing
route
Select
DELETE

Figure C. The
menu may read
Deactivate,
depending on
which was chosen
previously.

Select
MENU
waypoint

ENTER

Saving a Route. Once you have made changes to your
route, you may want to save those changes.
While viewing
route

Select
SAVE ROUTE

FIG.

ENTER

Or
MENU

MENU
ACTIVATE
VIEW/EDIT
REVERSE
DELETE
BACKTRACK
PLOT VIEW
WAYPOINTS
ROUTES
SETUP
SUN/MOON
FISH/HUNT
CONTRAST
ALARM/MSG

FIG.

Select
SAVE ROUTE

ENTER

Activating/Deactivating a Route. While navigating in your
route from home to campsite, you may decide you want to
activate (turn on) the home to campsite route and begin
navigating.
MENU

Select
ROUTES

Select
ACTIVATE

FIG.

Select
route

ENTER

Magellan GPS 315/GPS 320

While navigating in your route from home to campsite,
you may decide you want to deactivate (turn off ) the
route and return to it later.
MENU

Select
ROUTES

Select
DEACTIVATE

Select
route

ENTER

Reversing a Route. Once you have reached the end
of your route, you can reverse the route to return
home. For example, Camp...Fish, goes from A to B
to C to D, reversed would read from D to C to B to
A and the title would read Fish...Camp.
MENU

Select
ROUTES
Select
REVERSE

ENTER

FIG.

Select
route

ENTER

Using Plot View in a Route. While navigating in your
route, you can view the entire route in a small screen
overview with the use of Plot View.
MENU

Select
ROUTES
Select
PLOT VIEW

ENTER
FIG.

Select
ROUTES

ENTER

Select
DELETE

ENTER

Magellan GPS 315/GPS 320

EMPTY

LEGS

DISTANCE

0.00 mn

Figure D. The
route title will
change when you
reverse a route.

Select
route
MENU

ENTER

Deleting a Route. After your last trip using your home
to campsite route, you decide you no longer want to
visit those sites. You can delete the route from your
receiver.
MENU

ROUTE MENU
1 FISH
...CAMP

Select
route

ACTIVATE
VIEW/EDIT
REVERSE
DELETE
BACKTRACK
PLOT VIEW
WAYPOINTS
ROUTES
SETUP
SUN/MOON
FISH/HUNT
CONTRAST
ALARM/MSG

Figure E. Use this
menu for
accessing Plot
View in a route.

Working with TrackRoute
TrackRoute (previously called Map ‘N Track in the receiver)
consists of track points collected by the Track History
function. A track can be up to 1200 points in size.
Activating. By activating the TrackRoute at the top of the
ROUTE MENU, you can navigate from the first created
track point to the last track point, making a reverse BACKTRACK. This turns the Track History logging off to keep
from overwriting track points in memory. The top of the
navigation screens will indicate TO: LEGXXXX where
XXXX is between 0 to 1200. As you navigate with the
receiver and pass individual track points, the legs will switch
and countdown until you reach LEG 0 which is your final
destination.
Deactivate. When TrackRoute is deactivated, Track History
logging begins. The track points will be overwritten once
the receiver records new position fixes.
Reverse. This reverses the TrackRoute or the track in Track
History.
Delete. This erases the track points in Track History.
Backtrack. This activates BACKTRACK Route by saving
the Track History as a 30 leg route and activating it.

There may be
some track
points that are
close to each
other causing
the receiver to
skip 1 or more
of these legs.

Magellan GPS 315/GPS 320

Auxiliary Functions
Working with Sun/Moon and Fish/Hunt
The Sun/Moon function displays solar and lunar calculations and the Fish/Hunt function displays times for
excellent and good Fishing/Hunting. The default will be
the current position unless the function is accessed from a
waypoint menu or waypoint information screen.
Sun/Moon
From any
NAV screen

ENTER

Select
SUN/MOON

Change
location

ENTER

SUN/MOON
AT: POS
ON: 23MAR98

RISE/SET
SUN
RISE 06:55AM
SET 05:08PM
MOON
RISE 07:32PM
SET 01:49AM
PHASE

FIG.

Change
date

ENTER

Figure A. You
can change the
location (AT)
and/or the date
(ON) for the
calculation.

Fish/Hunt
From any
NAV screen

Select
FISH/HUNT

ENTER

FIG.

SUN/MOON
AT: POS
ON: 23MAR98

FISH/HUNT

ENTER

Change
location

ENTER

Change
date

EXCELLENT
FROM 06:15AM
TO
07:45 AM
FROM 10:24PM
TO
11:58PM
GOOD
FROM 04:12PM
TO
07:40PM
FROM 06:37AM
TO
10:05AM

Figure B. You can
change the location
(AT) and/or the
date (ON) for the
calculation.

Magellan GPS 315/GPS 320

Selecting the Simulate Mode
The Simulate mode will help you become familiar with your
receiver and how it works by generating artificial position
fixes. By utilizing Simulate, the receiver will create a route
and will continue until you end it. In order to end and
delete the created route, you can return to the window
(where you initiated the mode) and select OFF or power the
receiver off.
SIMULATE
OFF
AUTO
USER

Figure A. If USER
is selected, you will
be asked to input
SOG and COG.

From any
screen

Select
SETUP

Select
SIMULATE

ENTER

FIG.

ENTER

Select
mode

ENTER

Default setting: OFF
Both AUTO and USER modes generate a route and
simulate navigation using that route. AUTO mode uses a
speed of 25 mph and automatically generates a COG to
follow the route. USER mode allows you to set the speed
and COG to values you enter.

WPT
CONTRAST
NAMES

If your receiver is not computing a position fix
after exiting Simulate mode, you may need to
reset your present position by reinitializing.
This is due to the Simulated position being
more than 300 miles from your actual present
position.

OFF
ON

Figure B. Use the
cursor to adjust
the screen to your
preference.

Selecting Contrast
You may want to change the contrast of your receiver. You
can adjust the brightness depending on your preference.
From any
screen

Adjust
contrast

Select
CONTRAST

ENTER

FIG.

ENTER

Magellan GPS 315/GPS 320

Selecting Alarm/Message
Accessing the Alarm/Message Menu
While navigating, you may decide to set an alarm. The
receiver has five types of alarms: Anchor alarm, Arrival
alarm, XTE alarm, Proximity alarm and GPS Fix alarm. To
access the Alarm/MSG menu:
From any
screen

Select
ALARM/MSG ENTER

Select
alarm type

ENTER

The Anchor alarm will notify that you have moved from the
set position. For example, while boating, you can set your
Anchor alarm. Once anchored, your boat begins to drift
from the set position, a pop-up window will appear to
notify that you are moving.

Select
range

Select
ANCHOR

ENTER

ROCKS ON
LEFT

When the pop-up
window for an
alarm is displayed,
the distance and a
message, if there are
any messages, will
appear.

Selecting Anchor Alarm

While viewing
Alarm/Msg screen

WPT
NAMES
ATTENTION
P WPT001 IS
OFF
F
ONWITHIN 100 T

FIG.

ENTER

The alarm will sound when the GPS position is at a distance
greater than the distance you have chosen. The alarm will
sound until turned off or the condition is corrected.

WPT
NAMES
ANCHOR
OFF
100FT
ON
250FT
500FT

Figure C. You can
choose from OFF,
100, 250 or 500
feet.

Default setting: OFF

Magellan GPS 315/GPS 320

Selecting Arrival Alarm
WPT
NAMES
ARRIVAL
OFF
100FT
ON
250FT
500FT
0.2 MI
0.5 MI
1.0 MI

Figure A. You can
choose from OFF,
100, 250, 500 feet,
0.2, 0.5 and 1.0
miles.

The Arrival alarm will notify you when you are within the
arrival circle of the destination waypoint.
While viewing
Alarm/Msg screen
Select
range

Select
ARRIVAL

ENTER

FIG.

ENTER

The alarm will sound and a pop-up window will appear
when the GPS position is within the arrival circle you have
chosen. The pop-up window will display the arrival circle
distance as well as any message you have inputted for the
waypoint. The alarm will sound until turned off.
Default setting: OFF

Selecting XTE Alarm
WPT XTE
NAMES
OFF
100FT
ON
250FT
500FT
0.2 MI
0.5 MI
1.0 MI

Figure B. You can
choose from OFF,
100, 250, 500 feet,
0.2, 0.5 and 1.0
miles.

The XTE (Cross Track Error) alarm will notify you when
you have gone off your set course.
While viewing
Alarm/Msg screen
Select
range

Select
XTE

ENTER

FIG.

ENTER

The alarm will sound when the GPS position is off your set
course by the distance you have chosen. The alarm will
sound until turned off or the condition is corrected.
Default setting: OFF

Selecting Proximity Alarm
The Proximity alarm will sound when you are within the
proximity of any waypoints you have chosen that are not on
the active route.

Magellan GPS 315/GPS 320

Select
PROXIMITY

While viewing
Alarm/Msg screen
Select
range

FIG.

ENTER

Select

FIG.

WPT
PROXIMITY
NAMES

Select
field

Select
INSERT, DELETE
or REPLACE *

Select
waypoint

ENTER

OFF
100FT
ON
250FT
500FT
0.2 MI
0.5 MI
1.0 MI

ENTER

Continue until
complete

Figure C. You can
choose OFF, 100,
250, 500 feet, 0.2,
0.5 and 1.0 miles.

ENTER

SAVE WPTS

* DELETE and REPLACE will be displayed only if you
select a used waypoint field.

PROX WPTS
REEF
ROCKS
WPT001
WPT002

The alarm will sound and a pop-up window will appear
when the GPS position is within the proximity distance you
have chosen. The pop-up window will display the proximity distance as well as any message you have inputted for the
waypoint. The alarm will sound until turned off.
Default setting: OFF

Due to government imposed Selective Availability, alarm limit values under 100 feet may have
errors. Do not rely on this feature for precise
navigation.

Figure D. You can
select any saved
waypoint to list on
the Proximity
waypoint screen.

Selecting GPS Fix Alarm
The GPS Fix alarm allows the Poor GPS alarm to be turned
off. Therefore, when the GPS reception is poor, you will
not be notified.
While viewing
Alarm/Msg screen
Select
on or off

Select
GPS FIX

ENTER

FIG.

GPS ALARM
OFF
ON

Figure E. You can
choose from OFF
or ON.

ENTER

Default setting: OFF

Magellan GPS 315/GPS 320

MENU
DEFAULTS
CLEAR MSG
WAYPOINTS
ROUTES
SETUP
SUN/MOON
FISH/HUNT
CONTRAST
ALARM/MSG

Figure A. You can
restore the default
settings or clear all
messages.
WPT
NAMES
DEFAULTS
OFFRESTORE
ON DEFAULT
SETTINGS?
YES
NO

Viewing the Alarm/MSG Menu
While viewing
Alarm/Msg screen

FIG.

Selecting Alarm Defaults
After a memory clear, you may want to restore the alarm
default settings.
Select
DEFAULTS

While viewing
Alarm/Msg screen

ENTER

FIG.

Select
ENTER
yes or no

Clearing Alarm Defaults
Figure B. The
screen verifies the
selection you
made.

The message buffer may become cluttered with information.
You can use the CLEAR MSG to delete the messages.
Select
ENTER
CLEAR MSG

While viewing
Alarm/Msg screen

WPT
CLRNAMES
MSG
OFF CLEAR
ALL
ON
MESSAGES?
YES
NO

Figure C. Once
cleared you cannot
retrieve this
information.

Select
yes or no

ENTER

Selecting Language
Use the following steps to change the language (English,
Spanish, German, Italian or Swedish) of the GPS 315 or
GPS 320.
From any
navigation screen
Select
language

FIG.

Select
LANGUAGE

ENTER

Magellan GPS 315/GPS 320

Customizing
MENU

Selecting Setup
Setup allows you to initialize the receiver and set system
parameters to your preference.
From any
NAV screen

Select
SETUP

FIG.

ENTER

Selecting Initialize
By initializing your receiver, you establish the initial position
for the receiver. This will enable the receiver to search the
sky for available satellites. You will need to reinitialize if you
have traveled more than 300 miles while the receiver is
turned off. To initialize:
MENU

Select
INITIALIZE

Select
SETUP
FIG.

ENTER

Follow the steps requested to initialize, as done when the
receiver was initialized the first time (see Getting Started).

Disabling NAV Screens

COORD SYS
MAP DATUM
ELEV MODE
PROJECTION
TRIP RESET
WAYPOINTS
ROUTES
SETUP
SUN/MOON
FISH/HUNT
CONTRAST
ALARM/MSG

Figure E. Refer to
this screen
anytime you want
to access Setup.

SETUP
INITIALIZE
NAV SCREENS
COORD SYSTEM
MAP DATUM
ELEV MODE
TIME FORMAT
NAV UNITS
NORTH REF
LIGHT TIMER
BEEPER
PERSONALIZE
CLEAR MEMORY
NMEA
BAUD RATE
SIMULATE

Figure F. If you
need to initialize
again, make this
selection.

You may find that you do not use one, or more, of the nine
NAV screens provided in the receiver. You have the option
to disable NAV screens, except for the STATUS and
POSITION screens.
The default for
the TIME screen
is off.

Magellan GPS 315/GPS 320

Select
SETUP

ENTER

Select
NAV SCREENS

WPT
NAMES
NAV
1
OFF
OFF
ON
ON

Figure A. You can
turn NAV screens
on or off.

ENTER

FIG.

Select
on or off ENTER

The COMPASS screen is displayed next with the same popup menu. You will continue to be prompted for the other
NAV screens.

Selecting a Coordinate System
WPT NAMES
COORD
SYS
PRIMARY
OFF
ON
SECONDARY

Figure B. You can
choose from LAT/
LON, UTM, TD,
OSGB, Irish,
Swiss, Swedish,
Finnish, German,
French, MGRS and
User Grid.

A coordinate system is provided for you. This option allows
you to select primary and secondary coordinates used for
entering and viewing position information. The most
common is LAT/LON.
MENU

ENTER

FIG.

Select
SETUP
FIG.

Select
format

ENTER

Select
system

Select
COORD SYSTEM

ENTER

If a format is required for the coordinate system you have
chosen, a pop-up menu will be displayed.
WPT
LAT/LON
NAMES
OFF
DEG/MIN.MM
ON
DEG/MIN.MMM
DEG/MIN/SEC

Figure C. You
can choose from
DEG/
MIN.MM,
DEGMIN.MMM
or DEG/MIN/
SEC. The
screen will be
different for
other coordinate
systems.

The default primary coordinate system will be Lat/Lon in
Degrees/Minutes and the default secondary coordinate
system will be UTM.

You will want the receiver to use position
coordinates in the same map datum that is used
by your maps.

Magellan GPS 315/GPS 320

Selecting Map Datum
You can change the datum the receiver uses to compute
position coordinates. You will want your receiver’s datum to
match the datum on the map or chart you are using. Use
the map “legend” to determine the datum required for the
map or chart. If you are not using a map or chart or are
unsure which datum to use, select WGS84.
MENU

ENTER

Select
SETUP
FIG.

Select
MAP DATUM

Select primary
or secondary

Select
datum

ENTER

WPT NAMES
ELEV
MODE

Selecting Elevation Mode
You have the option of changing your elevation mode to 2D
(2-Dimensional) or 3D (3-Dimensional). You may find 2D
useful if you know the elevation of your position and the
elevation will not change. Your receiver will compute
elevation in 3D mode but will not in 2D mode.

ENTER

Select
SETUP
FIG.

ENTER

Select
3D or 2D

Select
ELEV MODE

ENTER

If you select 3D, the receiver will return to SETUP. If 2D is
selected, the receiver will ask for elevation.
FIG.

Figure D. Be sure
the map datum
matches the datum
required for the
maps or charts you
are using.

ENTER

Default setting: WGS84

WPT DATUM
MAP
NAMES
PRIMARY
OFF
ON
SECONDARY

Input
elevation

3D
OFF
2D
ON

Figure E. You can
choose from 2D
or 3D.

WPT NAMES
ELEVATION
OFF 0000FT
ON

Figure F. If you
are at sea level, you
can use 2D
because your
elevation is zero.

ENTER

Default setting: 3D

Magellan GPS 315/GPS 320

SETUP
INITIALIZE
NAV SCREENS
COORD SYSTEM
MAP DATUM
ELEV MODE
TIME FORMAT
NAV UNITS
NORTH REF
LIGHT TIMER
BEEPER
PERSONALIZE
CLEAR MEMORY
NMEA
BAUD RATE
SIMULATE

Figure A. You can
access Time Format
from this menu.
TIME FORMAT
LOCAL 24HR
LOCAL AM/PM
UTC

Figure B. You can
choose from
LOCAL 24HR,
LOCAL AM/PM or
UTC.
NAV UNITS
MILES/MPH
NM/KNOTS
KM/KPH

Figure C. You can
choose from
MILES/MPH,
NM/KNOTS and
KM/KPH.
NORTH REF
° TRUE
° MAGNETIC
MILS TRUE
MILS MAG

Figure D. You can
choose from
TRUE, MAGNETIC, MILS
TRUE or MILS
MAG.

Selecting Time Format
You have the option of changing the format for the time.
MENU

ENTER

Select
SETUP
FIG.

FIG.

ENTER

Select
value

Select
TIME FORMAT

ENTER

Input
time

ENTER

If UTC is selected, the receiver will return to SETUP. If
LOCAL 24HR or LOCAL AM/PM are selected, a pop-up
menu will be displayed prompting you to input the correct
time.
Default: Local AM/PM

Selecting NAV Units
You can choose the units of measure used by your receiver.
MENU

ENTER

Select
SETUP
FIG.

Select
NAV UNITS

ENTER

Select
units

ENTER

Default setting is MILES/MPH for land use in the United
States and KM/KPH for land use outside the United States.
Default setting is NM/KNOTS for marine use.

Selecting North Reference
The receiver uses magnetic north as a default reference for
all navigation computation. You can change this to true
north (good, if you are using a map) or back to magnetic
north (default, good to use if you are using a compass), or
mils true or mils mag under SETUP.
MENU

FIG.

Select
SETUP

ENTER

Select
NORTH REF

ENTER

Select
reference ENTER

Default setting: MAGNETIC
Magellan GPS 315/GPS 320

Selecting Light Timer
The light timer is a power saving function that automatically turns the light off.
MENU

Select
SETUP

FIG.

Select
time

ENTER

Select
ENTER
LIGHT TIMER

ENTER

Default setting: ALWAYS ON

Selecting the Beeper
You can select the options for when the beeper will sound.
MENU

Select
SETUP

FIG.

Select
beeper

Select
BEEPER

ENTER

Default setting: KEYS/ALARM

Selecting Personalize

Select
SETUP

Select
on or off

ENTER

If ON is selected:
Enter
name

ENTER

Figure E. Once the
timer turns the light
off, it can be turned
on with the next
key press. Suppose
you select the timer
setting for 30
seconds. Press the
light key to turn the
light on, it remains
lit. With the next
key press, the light
turns on again for
30 seconds. This
continues until you
turn the light or the
receiver off.

BEEPER

With the personalize function, you have the option of
inputting your name into the receiver.
MENU

LIGHT
WPT NAMES
TIMER
OFF
ALWAYS ON
ON
15 SECONDS
30 SECONDS
1 MINUTE
2 MINUTES
4 MINUTES

Select
PERSONALIZE

ENTER

OFF
KEYS ONLY
ALARM ONLY
KEYS /ALARM

Figure F. You can
choose from
OFF, KEYS
ONLY, ALARM
ONLY and
KEYS/ALARM.

ENTER

Magellan GPS 315/GPS 320

Selecting Clear Memory
The Clear Memory function allows you to delete track
history, waypoints and routes as well as reset the settings to
the factory defaults. There is also an option to delete
everything in the receiver’s memory. Use caution when
accessing the Clear Memory function. Once you have
deleted, you cannot undo the process or retrieve this
deleted data.
CLEAR
WPT NAMES
MENU
TRACK HIST
OFF
WPT/ROUTES
ON
BACK WPTS
ROUTES
RESET DFALT
ALL

FIG.

Figure A. You can
choose from
TRACK HIST,
WPT/ROUTES,
BACK WPTS,
ROUTES,
RESET DFALT
and ALL.

Select
SETUP

Select

ENTER

CLEAR MEMORY

Select item
to clear

ENTER

If you clear all memory, the receiver will clear
everything and power itself off.

Selecting NMEA
Your receiver can be set to output GPS data to interface
with your personal computer.
WPT
NMEA
NAMES
OFF
V1.5
ON APA
V1.5 XTE
V2.1 GSA

Figure B. You can
choose from OFF,
V1.5 APA, V1.5
XTE and V2.1
GSA.

FIG.

Select
SETUP
Select
NMEA

ENTER

Select
NMEA

ENTER

Default setting: OFF

Magellan GPS 315/GPS 320

Selecting Baud Rate
Connection to external devices requires that the baud rate of
the data being sent or received by the receiver be matched to
the baud rate of the external device.
MENU

FIG.

Select
SETUP
Select
baud rate

ENTER

Select
BAUD RATE

ENTER

WPT
NAMES
BAUD
RATE
1200 BAUD
OFF
4800 BAUD
ON
9600 BAUD
19200 BAUD

Figure C. You can
choose from 1200,
4800, 9600 and
19200 baud.

Default: 4800 baud

Magellan GPS 315/GPS 320

Connecting to DGPS
For the DBR (differential beacon receiver) that has a DB9 connector on the
housing, the pinout is:
Pin 2: Data out to GPS
Pin 3: Data in
Pin 5: Sig. GND

5
9

1
6

To use the PC interface cable to interface the GPS receiver with the DBR-2 or
DBR-3, you must use a null modem (Radio Shack P/N: 26-264A) and a gender
changer (Radio Shack P/N: 26-280A) to connect the GPS receiver properly. This
is due to the pinout being the opposite of the DB9 connector configuration for a
PC connection.

Magellan GPS 315/GPS 320

Troubleshooting
Receiver will not turn on:
1.

Check to see if batteries are installed correctly.

Replace with two new AA alkaline or lithium batteries.

Takes more than 10 minutes to get a position fix:
1.

If there are any obstacles nearby or overhead, move to a new
location.

Make sure that the antenna is pointing up, has a clear view of the
sky and is a reasonable distance away from your body.

Check Satellite Status to see where the satellites are and if the
receiver is acquiring data.

If the receiver still does not get a position fix within 10 minutes,
you may wish to repeat the initialization procedure.

Elevation jumps up and down:
1.

Errors induced by the Department of Defense called Selective
Availability (SA) can cause the elevation values to fluctuate.

Battery life seems shorter than it should be:
1.

Make sure that you are using two AA alkaline or lithium
batteries.

Shorter life span of the batteries can be due to excessive use of
the backlight. Turn the backlight off when not needed.

Position coordinates on your receiver do not match the location on
your map.
1.

Make sure that your receiver is set up to use the same datum as
your map. The map datum is generally shown in the map
legend. See Map Datum under Reference for instructions on
selecting the map datum in your receiver.

Check your LAT/LON format. Make sure that the format
selected in COORDINATE SYSTEM (DEG/MIN/SEC or
DEG/MIN.MM) is in the same format as the map you are
using.

Magellan GPS 315/GPS 320

Commonly Asked Questions
Does the receiver adjust itself for daylight savings time?
No. You need to reset the time for changes in your area (see
Selecting Time Format).
Will my receiver function correctly in the year 2000?
Yes. Even though the last two digits of the year are displayed, the
full year designator is stored in memory.
Why won’t the receiver accept the coordinates I am inputting?
The most common cause is that you are trying to enter coordinates that are in degrees/minutes while your receiver is set to
degrees/minutes/seconds. Because the last two digits in degrees/
minutes are in hundredths (00-99) and degrees/minutes/seconds
can be no higher than 59 (00-59), inputting a number higher
than 59 while in deg/min/sec results in an error and the receiver
does not accept the entry.
Can I use NiCad batteries in my receiver?
Yes. However, the battery life of your receiver will be diminished
as well as the possibility of an incorrect reading on the battery
life gauge with the use of NiCad batteries.
You say my receiver should work up to 15 hours on two batteries, but
mine doesn’t last that long?
There can be two reasons. The first, and most common, reason
is that you have the display backlight on. The light increases the
drain on the batteries causing the decrease in battery life. The
second reason is that you are using NiCad batteries. As mentioned, while your receiver will operate on NiCad batteries, the
battery life is diminished.
Why is the time and date incorrect after I replace the batteries?
If the batteries are removed for 20 minutes or more, the receiver
will lose the time and date. The receiver will collect time and
date soon after tracking a satellite.

Magellan GPS 315/GPS 320

Contacting Magellan
If after using the troubleshooting section, you are still unable to solve
your operation problems, please call Magellan’s Technical Service at
(800) 707-9971.
Representatives are available Monday through Friday from 7 AM to
5 PM, PST. Faxes can be sent to Customer Service at (909) 394-7070.
If necessary, you can also return your receiver to Magellan for repair
(please call for assistance first). If possible, please notify us before
shipping the receiver by Parcel Post or UPS and include a description of
the problem, your name, address and a copy of your sales receipt. If
your return ship address is different, please indicate.
Please return the enclosed registration card in order to have your
information on file.
With all correspondence, please state the model of your receiver and if
calling, please have your receiver with you.
Packages should be sent to:
Magellan Corporation
960 Overland Court
San Dimas, CA 91773
ATTN: Warranty/Repair

Shipping Your Receiver
When shipping your receiver by air, loosen the battery door screw by
turning the screw by 1/2 turn. This will prevent damage to the
receiver’s water seal during shipping due to pressure differences.

Magellan GPS 315/GPS 320

NMEA DATA MESSAGES
Your GPS receiver can be set to output GPS data in the NMEA 0183 version
1.5 or version 2.1 format to interface with other marine devices or equipment.
NMEA DATA MESSAGES. NMEA data is output at 4800 baud, 8, N, 1,
checksum off. These settings are acceptable to most equipment and software
applications. The baud rate can also be set to 1200, 9600 or 19200.
There are several NMEA output message sets, each with a slightly different
application. Check documentation for your external equipment to choose
the appropriate message set.
SET

OUTPUT/USAGE

V1.5.APA

BWC, APA, GLL, VTG
Remote displays, version 1.5 marine autopilots

V1.5 XTE

XTE, BWC, GLL, VTG
Version 1.5 Marine autopilots

V2.1 GSA

GSA, GSV, GLL, GGA, RMB, RMC and APB. Vers. 2.1
NMEA is recommended for navigation data, satellite
data and autopilots.

NMEA Message Definitions
APA

APB

BWC
GGA

GLL
GSA

GSV
RMB

RMC
VTG
52

Autopilot cross track error, direction to steer, status of GPS, route status,
destination waypoint name, and bearing from origin to destination
(old format).
Revised autopilot message contains all of the above plus: heading to
steer toward destination, bearing from the present position to the
destination (magnetic or true).
Range and bearing to a waypoint.
GPS position, time, fix quality, number of satellites used, HDOP
(Horizontal Dilution of Precision), differential reference information,
and age.
GPS-derived latitude, longitude, and time of fix.
GPS receiver operating mode, satellites used in the navigation solution
reported by the $--GGA sentence and DOP (Dilution of Precision)
values.
Number of satellites in view, satellite numbers, elevation, azimuth, and
SNR value.
Data status, cross track error, direction to steer, origin, destination
landmark, landmark location, bearing to destination, and velocity
toward the destination.
Time, latitude, longitude, speed, heading, and date.
Track (magnetic and true) and groundspeed (knots and KPH).
Magellan GPS 315/GPS 320

NMEA OUTPUT DATA FORMAT - VERSION 1.5
APA

Autopilot Format A

1 2 3
4 5 6 7 8
9 10
APA,A,A,X.XX,L,N,A,A,XXX.,M,CCC
1

OR’ed Blink and SNR

Cycle Lock

(A = valid, V = invalid)

3-5 Cross Track, Sense (L = steer left, R = steer Right), N.Mi.
Units
6-7 Arrival Circle, Arrival Perpendicular (crossing of the line
which is perpendicular to the course line and which passes
through the destination waypoint.
8-9 Bearing dest. WPT. from origin WPT., Magnetic
10 Dest WPT. identifier

BWC

To Selected Waypoint, Great Circle

1
2
3 4
5 6
7 8
9 10
1112
BWC,XXXXXX,XXXX.XX,N,XXXXX.XX,W,XXX.,T,XXX.,M,XXX.X,N,CCCC
1

UTC of Bearing

2-3 Lat, N or S of waypoint
4-5 Long, E or W of waypoint
6-7 Bearing, True
8-9 Bearing, Magnetic
10-11Distance, naut. miles
12

GLL

Waypoint identifier

Geographic Position — Latitude/Longitude

1
2 3
4 5
6
GLL,1111.11,a,yyyyy.yy,a,hhmmss.ss,A*hh
1-2

Latitude, N/S

2-3

Longitude, E/W

UTC of position

Status

Magellan GPS 315/GPS 320

A = Data valid

VTG

Actual Track and Ground Speed (SPD)

1
2 3
4 5
6 7
8
VTG,XXX.,T,XXX.,M,XX.X,N,XX.X,K
1-2

Track degrees, True

3-4

Track degrees, Magnetic

5-6

Speed, knots

7-8

Speed, kilometers/hour

XTE

Cross Track Error

1 2
3
4 5
XTE, A,A,X.XX, L,N
1

Or’ed value Blink and SNR (A=Valid, V=Invalid)

Cycle Lock, (A=Valid, V=Invalid)

Cross Track Error

Steer Left of Right (L = Left, R = Right)

Units (N.Mi.)

NMEA 0183 VERSION 2.1
APB

Autopilot Sentence “B”

1 2 3
4 5 6 7 8
9 10 11 12 13 14
APB,A,A,x.x,a,N,A,A,x.x,a,c—c,x.x,a,x.x,a*hh
1

Status: A = Data valid

V = Loran-C Blink or SNR warning
V = general warning flag for other
navigation systems when a
reliable fix is not available.
2

Status: V = Loran-C cycle lock warning flag
A = OK or not used

Magnitude of XTE

Direction to steer (L, R)

XTE units, nautical miles

Status:

A = arrival circle entered

Status:

A = perpendicular passed at waypoint

8-9

Bearing origin to destination, M/T

Destination waypoint ID

11-12 Bearing, present position to destination, Magnetic or True
13-14 Heading to steer to destination waypoint, Magnetic or True

Magellan GPS 315/GPS 320

GGA

Global Positioning System Fix Data

1
2
3 4
5 6 7 8
9 10 11
GGA,hhmmss.ss,1111.11,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,
12 13

M,x.x,xxxx*hh

UTC of Position

2-3 Latitude - N/S
4-5 Longitude - E/W
6

GPS Quality Indicator

0 = fix not available or invalid
1 = GPS SPS Mode, Fix valid
2 = Differential GPS, SPS Mode, fix valid
3 = GPS PPS Mode, fix valid
7

Number of satellites in use (00-12, may be different
from the number in view)

Horizontal dilution of precision

Antenna altitude above/below mean sea level

Units of antenna altitude, meters

Geoidal separation - difference between the WGS-84
earth ellipsoid and mean sea level (geoid), “-” =
mean sea level below ellipsoid

Units of geoidal separation, meters.

Age of Differential GPS data - Time in seconds since
last SC104 Type 1 or 9 update, null field when DGPS
is not used

Differential reference station ID, 0000-1023

GLL

Geographic Position — Latitude/Longitude

1
2 3
4 5
6
GLL,1111.11,a,yyyyy.yy,a,hhmmss.ss,A*hh
1-2

Latitude, N/S

2-3

Longitude, E/W

UTC of position

Status

A = Data valid
V = Data not valid

Magellan GPS 315/GPS 320

GSA

GPS DOP and Active Satellites
GPS receiver operating mode, satelites used in the navigation
solution reported by the $--GGA sentence, and DOP values.

1 2 3
4 5
6 7
GSA,a,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,x.x,x.x,x.x*hh,
1

Mode: M=Manual, forced to operate in 2D or 3D mode,
A=Automatic, allowed to automatically switch 2D/3D

Mode: 1= Fix not available, 2=2D, 3=3D

3-4 PRN numbers of satellites used in solution (null for unused
fields)
5

PDOP

HDOP

VDOP

GSV

GPS Satellites in View
Number of satellites (SV) in view, PRN numbers, elevation,
azimuth and SNR value. Four satellites maximum per transmission, additional satellite data sent in second or their
message. Total number of messages being transmitted and the
number of messages being transmitted is indicated in the
first two fields.

1 2 3 4 5 6
7 8
9 10
11
GSV,x,x,xx,xx,xx,xxx,xx.........,xx,xx,xxx,xx*hh
1

Total number of messages, 1 to 9

Message number, 1 to 9

Total numer of satellites in view

Satellite PRN number

Elevation, degrees, 90° maximum

Azimuth, degrees True, 000 to 359

SNR (C/No) 00-99 dB, null when not tracking

8-9 2nd-3rd SV
10-11 4th SV
Notes: 1) Satellite information may require the transmission
of multiple messages. The first field specifies the total
number of messages, minimum value 1. The second field identifies the order of this message (message number), minimum
value 1.
2) A variable number of “PRN-Elevation-Azimuth-SNR” sets are
allowed up to a maximum of four sets per message. Null fields
are not required for unused sets when less than four sets are
transmitted.

Magellan GPS 315/GPS 320

RMB

Generic Navigation Information (immediately follows RMC)

1 2

3 4

7 8

9 10

13 14

RMB,A,X.XX,a,c--c,c--c,1111.11,a,yyyyy.yy,a,x.x,x.x,x.x,A *hh
1

Data Status

(A = valid,

V = invalid)

2-3 XTE, naut. miles and direction to steer (L or R)
exceeds 9.99 NM, display 9.99 in field 2.]
4

Origin waypoint ID

Destination waypoint ID

[If XTE

6-7 Destination Waypoint Latitude (N or S)
8-9 Destination Waypoint Longitude (E or W)
10

Range naut. miles, present fix to destination waypoint
Great Circle. [If range exceeds 999.9 nm, display 999.9.]

Bearing, True, Great Circle, Present fix to dest. waypoint

Closing velocity to destination, knots

RMC

Arrival (OR’ed arrival circle and crossing of line which is
perpendicular to the course line and which passes through
the destination waypoint.)
CHECKSUM

(Mandatory in this sentence.)

Transit Specific (to be followed by RMB)

1
2 3
4 5
6 7
8
9
10
11
RMC,hhmmss.ss,A,1111.11,a,yyyyy.yy,a,x.x,x.x,xxxxxx,x.x,aa*hh
1

Time, UTC of position fix

Status

(A = valid,

V = Navigation receiver warning)

3-4 Latitude at UTC time, N or S
5-6 Longitude at UTC time, E or W
7

Speed over ground, knots

Course over ground, degrees

Date

Magnetic variation, degrees (E or W)

(DDMMYY)

Mode Indicator

The formats listed are NMEA formats and Magellan receivers may not
output all of the information listed for a particular format.
A complete copy of the NMEA specifications can be obtained from:
NMEA, PO Box 3435 New Bern, NC 28564-3435
Magellan GPS 315/GPS 320

Available Datums

Datum

Full Name

Datum

Full Name

WGS84
NAD27
NAD83
ADIND
ALASK
ARC50
ARC60
ASTRO
AUS66
AUS84
BOGOT
BUKIT
CAMPO
CANAD
CAPE
CARTH
CENAM
CHATH
CHUAA
CORRE
CYPRU
DJAKA
EGYPT
EUROP
EUR50
EUR79
GANDA
GEO49
GHANA
GRB36
GUAM
GUNSG
GUNSR
HAWAI
HERAT
HJORS
HUTZU
INDIA
IRAN

World Geodetic System
North America 1927
North American 1983
Adinda
Alaska
Arc 1950
Arc 1960
Camp Area Astro
Australian Geodetic 1966
Australian Geodetic 1984
Bogota Observatory
Bukit Rimpah
Campo Inchauspe
Canada
Cape
Carthage
Central America
Chatham 1971
Chau Astro
Corrego Alegre
Cyprus
Djakarta (Batavia)
Egypt
European 1950 (All of Europe)
European 1950 (W. Europe)
European 1979
Gandajika Base
Geodetic Datum 1949

IRELA
KAUAI
KERTA
KKJ
LIBER
LUZON
MASSA
MAUI
MERCH
MINNA
MONTJ
NAHRW
OAHU
OEGYP
OHAWA
OMAN
PITCA
QATAR
QORNO
RT90
SAM56

Ireland 1965
Kauai
Kertau 1948
KKJ (Finland)
Liberia 1964
Luzon
Massawa
Maui
Merchich
Minna

SAM69
SCHWA
SICIL
SIERR
SWISS
TANAN

Nahrwan, Saudi Arabia
Oahu
Old Egyption
Old Hawaiian
Oman
Pitcairn Astro 1967
Qatar National
Qornoq
RT90 (Sweden)
Provisional So. Am.
1956
South American 1969
Schwarzeck
Sicily

Tananarive Observatory
1925
Ordinance Survey of GB, 1936 THAI
Indian (Thailand,
Guam
Vietnam)
G. Segara
TIMBA
Timbalai
TOKYO
Tokyo
Hawaii
USER DEFINED
Herat North
VOIRO
Hjorsey 1955
WGS72
World Geodetic System
1972
Hu-tzu-shan
YACAR
Yacare
Indian (India, Nepal)
ZANDE
Zanderij
Iran
Magellan GPS 315/GPS 320

Specifications
CHARACTERISTICS
Performance
Receiver:

12 parallel-channel technology, tracks up to
12 satellites to compute and update information
with quadrifilar antenna

Acquisition Times (under optimal conditions):
Warm

Approximately 15 seconds

Cold

Approximately 1 minute

Update Rate

1 second continuous

Accuracy:
Position

49 feet (15 meters) RMS (with Selective Availability
turned off )

Velocity

0.1 knot RMS steady state (with Selective Availability
turned off )

Limits:
Speed

951 mph

Altitude

17,500 meters

Physical:
Size

6.2” x 2.0” x 1.3” [h] x [w] x [d]
15.75 cm x 5.08 cm x 3.30 cm

Weight

7 ounces (198.45 grams) with 2 AA batteries installed

Display

2.2” x 1.33” [h] x [w]
5.59 cm x 3.38 cm
high contrast LCD with EL backlit display

Housing

Waterproof (Battery compartment is splashproof )

Temp. Range:
Operating 14˚F to 140˚F to (-10˚C to 60˚C)
Storage
Power:
Source

-40˚F to 167˚F (-40˚C to 75˚C)

2 AA alkaline or lithium batteries or 9-16 VDC with
power cable
Battery Life
Up to 15 hours
Magellan GPS 315/GPS 320
59

Attaching the Wrist Lanyard
The lanyard for your GPS receiver can be easily attached by inserting
the small loop of the lanyard through the ring provided on the battery
door locking screw and then looping the other end of the lanyard strap
through the small loop.

Magellan GPS 315/GPS 320

Accessories
Accessories for your receiver are available from your Magellan dealer or
you can order directly from Magellan using the order card supplied with
your receiver or call Magellan at (800) 669-4477 (press 3 twice to place
an order).
Swivel Mounting Bracket: Mounts the receiver on a surface, allowing
for hands-free operation.
Vehicle Mounting Bracket: Mounts the receiver on the windshield,
allowing for hands-free operation.
Nylon or Leather Carrying Case: The carrying case protects your
receiver from the elements and allows you to carry your receiver on your
belt.
Power/Data Cable (Bare Wires): Allows you to connect your receiver
to external power and data.
PC Interface Cable with Cigarette Lighter Adapter: Connects your
receiver to your PC for data transfer and to a cigarette lighter for
external power.
External Power Cable with Cigarette Lighter Adapter: Allows you to
connect the receiver to a cigarette lighter for external power.
DataSend™ CD-ROM: The software contains a database of points of
interest that can be sent to your receiver. You can select from a number
of geographical locations and download them into your receiver.
DataTrack Waypoint Management Software: Includes DataTrack 3.5
floppy disc GPS data management software.
Instructional Video: A video in VHS format that provides you with
instructions on how to use and operate your receiver.
Differential Beacon Receiver (DBR-3): Connects to your receiver to
receive differential corrections (DGPS) for 5-10 meter accuracy.

Magellan GPS 315/GPS 320

Glossary

Active Leg

The segment of a route currently being traveled.

Altitude

The current elevation above sea level.

BRG

Bearing. The compass direction from your position
to a destination, measured to the nearest degree.

Buoy

A navigation aid (usually found in marine charts) that
is floating in water. The position can vary due
to the magnitude and direction of the current.

COG

Course Over Ground. The direction the receiver is
moving. COG can be reported in true or magnetic
north values.

Coordinates

A unique numeric or alphanumeric description of the
position.

CTS

Course to Steer. The direction you should be traveling
in order to return to the course while proceeding
towards the destination. It is a “compromise” course
bearing that projects from your current position to a
point on the courseline mid-way between a point
perpendicular to your position and the current leg
destination waypoint.

Datum

Refers to the theoretical mathematical model of the
earth’s sea level surface. Map makers may use a
different model to chart their maps, so position
coordinates will differ from one datum to another. The
datum for the map you are using can be found in the
legend of the map. If you are unsure of which datum
to use, use WGS84.

Default

The value or setting automatically chosen by the unit
unless otherwise directed. Can be changed in Setup.

DST

Distance. Distance from position to destination.

Magellan GPS 315/GPS 320

Ephemeris

The position and velocity of the satellites in the
sky. The receiver uses the ephemeris to calculate the
precise distance from the GPS receiver to the satellite.

ETA

Estimated Time of Arrival. The estimated time of day
the leg’s destination waypoint will be reached.

ETE

Estimated Time Enroute. The estimated time
remaining to reach the next waypoint in a route.

Fixed Navaid

A navigation aid (usually found in marine charts) that
has a fixed position and can be found on land or water.
An example is a T.V. tower on land or a Greenday mark
in water.

HDG

Heading. The direction you are facing, defined as an
angle from North.

Latitude

The angular distance north or south of the equator
measured by lines encircling the earth parallel to the
equator from 0˚ to 90˚.

LAT/LON

Coordinate system using latitude and longitude
coordinates to define a position on the earth.

Leg (Route)

A segment of a route that has a starting (FROM)
waypoint and a destination (TO) waypoint. A route
may consist of 1 or more legs. A route that is from
waypoint A to waypoint B to waypoint C to waypoint
D has three legs with the first being from waypoint A to
waypoint B.
D

B
A

Magellan GPS 315/GPS 320

Leg 1

Leg 2

g
Le

LMK

Landmark. A location saved in the unit’s
memory which is obtained by entering data,
editing data, calculating data or saving a
current position. Used to create routes. Same
as a waypoint.

Longitude

The angular distance east or west of the prime
meridian (Greenwich Meridian) as measured
by lines perpendicular to the parallels and
converging at the poles from 0˚to 180˚.

Magnetic North

The direction relative to a magnetic compass

NMEA

National Marine Electronics Association. A
professional organization that defines and
maintains the standard serial format used by
marine electronic navigation equipment and
computer interfaces.

OSGB

A coordinate system describing only Great
Britain, similar to UTMs. Used with GRB36
datum.

Position fix

Position coordinates as computed by the GPS
receiver.

SOG

Speed Over Ground. The speed at which the
receiver is moving.

TRN

Turn. Degrees or direction to turn.

True North

The direction to North Pole from an
observer’s position. The north direction on
any geographical meridian.

TTG

Time To Go. The measurement of how long
it will take you to arrive at your destination.
TTG is based on how fast you are moving
towards the destination and the distance
remaining.
Magellan GPS 315/GPS 320

UTC

Universal Time Coordinated. Formerly
referred to as Greenwich Mean Time (GMT).

UTM

Universal Transverse Mercator metric grid
system used on most large and intermediate
scale land topographic charts and maps.

VMG

Velocity Made Good. The component of the
velocity that is in the direction of the destination.

Waypoint

WPT. A location saved in the receiver’s
memory which is obtained by entering data,
editing data, calculating data or saving a
current position. Used to create routes.

XTE

Cross Track Error. The distance, left or right,
of the desired courseline. The courseline is a
straight line from your present position to
your destination.

Magellan GPS 315/GPS 320

Index
A
Accessories 60
Accuracy 3
Alarms 37
accessing 37; anchor 37;
arrival 38; clearing 40;
defaults 40; proximity 39;
selecting 37; viewing 40;
XTE 38
Anchor alarm 37
Antenna reception 4;
troubleshooting 49
Arrival alarm 38
Automatic Averaging 9
Auxiliary Functions 35

B
Backtrack creating 29
Batteries, installing 3;
life 8; troubleshooting 49, 50;
NiCad 50
Baud Rate 47
Bearing 10, 11, 12, 13, 16, 17,
18
Beeper 45

C
Cities category (based on
population) 1, 22, 23, 24
Clear Memory 46
Connecting to DGPS 48
Compass screen 11; customize
11
Coordinate System
selecting 42; viewing
secondary 9
66

Commonly Asked Questions 50
Contrast 36
Cross Track Error (XTE) 5, 10,
12, 16; alarm 38
Course over Ground (COG)
9, 10, 11, 12, 16, 17, 18;
Indicator 11
Course Projection 15
Cross Track Error alarm 38
Customer Service 51
Customize NAV Screens (see
Disabling NAV Screens)
Customizing 41

D
DataSend™ 23, 27
Date see Time and Date
Datums see Map Datums
Demo Mode see Simulate
DGPS 9
DGPS conection 48
Differences GPS 315/320 1
Disabling NAV Screens 41

E
Elapsed time 21
Elevation 9; 43
Entering Information 7
Estimated Position Error 9

F
Fish/Hunt 35
Fixed navaid 1, 62
Fixed Position 6

Magellan GPS 315/ GPS 320

Glossary 61
GOTO clearing 28; creating 28,
in the plotter screen 28
GPS fix alarm 40

Initializing 4, 41

Navigation screens 7; Compass
11; disabling 41; Nav 1 10;
Nav 2 12; Plot 13; Position 9;
Road 17; Speed 18; Status 8;
Time 20
Nav Units 44
NiCad batteries 50
NMEA 46; Data Messages
52-57
NorthFinder™ 11
North Reference 44

H
Hide Data/Show Data 16

Keys 2

Odometer 18; resetting 18

Landmark (LMK) 5
Lanyard strap instructions 60
LAT/LON 42;
troubleshooting 49
Light Timer 45

M
Magnetic North 44
Man Over Board (MOB)
clearing 29; creating 29
Map Datums available datums
58; selecting 43
Map ‘N Track Route 34
Memory clear 46
Message accessing 37;
viewing 37
Modes of operation
see Simulate mode; see 2D, 3D
Multi-Leg route, creating 30

Magellan GPS 315/ GPS 320

PAN-N-SCAN 14
Personalize 45
Plot Rings 15
Plot Scales 16
Plot screen 13
Plotter 15
Population of cities 24
Position fix 6; troubleshooting
49
Position screen 9
Power On 4
Primary Usage 5
Projecting a Waypoint 25
Proximity alarm 39

R
Receiver size 59
Reception 4
Road screen 17; customize 17

Route 28; activating/deactivat
ing a route 32; adding a
waypoint at the end of a route
32; changing a waypoint in a
route 31; deleting a waypoint in
a route 32; deleting a route 33;
editing 31; inserting a leg into
a route 31; reversing 33; using
Plot View in a route 33;
viewing 31

S
Satellite positions 8
Satellite signals 8
Setup 41
Shipping 51
Simulate Mode 9, 36
Sorting 26
Specifications 59
Speed screen 18; setting average
19
Status screen 8
Sun/Moon 35

U
Universal Time Coordinated
(UTC) 20, 44

W
Waypoint creating 24;
creating a message 25;
deleting a user waypoint 26;
deleting a message
25; editing a message 25;
finding a non-user waypoint
26; functions 23; naming 6;
saving 6, 25; sorting a
waypoint 26
Weight, receiver 59

X
XTE see Cross Track Error
XTE alarm see Cross Track
Error alarm

T
2D 8, 43
3D 8, 43
Terminology 5
Time and Date setting 4
Time Format 44
Time screen 20; elapsed time 21
Track History 13, 14; clear 14,
46
TrackRoute 34
Trip Odometer, resetting 19
True North 44
Troubleshooting 49

Magellan GPS 315/ GPS 320

960 Overland Court, San Dimas, CA 91773
(909) 394-5000
630321 D

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