Garrett Metal Detectors Sea Hunter Mark Ii Users Manual

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2015-02-09

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Page Count: 44

TABLE OF CONTENTS

To the Owner 4

Control Functions 6

Search Modes 8

Assembly 13

Operating Procedure 17

Field Recommendations 18

Search and Recovery Tips 20

Cautions 25

Maintenance 27

Battery Replacement 28

Recommended Accessories 30

Specifications 31

Repair Service 32

Warning 34

Recommended Reading 35

Mind Your Manners 37

RAM Book Order Form 39

TO THE OWNER

The Garrett Sea Hunter Mark II has an

unparalleled reputation among treasure

hunters, law enforcement agencies and

various industries as one of the most

reliable and sophisticated submersible

metal detectors of its kind.

The Sea Hunter Mark II is an advanced

microprocessor-driven instrument that is

lightweight, highly durable and easy to

use. The Sea Hunter's pulse induction

(PI) circuitry provides excellent depth

and enables you to find treasure without

interference from salt water and most

ground minerals.

OUTSTANDING FEATURES

The Sea Hunter's outstanding performance,

custom-designed housing and multiple

configurations make it superior to

other underwater detectors available.

Microprocessor-based circuitry in the Sea

Hunter provides greater sensitivity, faster

target response and comes with Garrett's

exclusive Discrete Target Elimination

mode. The custom designed double-

o-ring sealed housing is durable and

lightweight, with individual, o-ring sealed

battery and electronics compartments that

makes battery replacement hassle free.

An 8" epoxy-filled searchcoil and custom

designed headphones, submersible to 200

feet, make the Sea Hunter Mark II highly

stable and reliable.

The Sea Hunter Mark II is very versatile,

offering four stem arrangements to suit

your search needs: the long stem with top

stem mount, under cuff stem mount, hip

mount and the short stem ScubaMate.

Each arrangement allows you the versatility

to search on land, in shallow water or

underwater, or in situations where a sealed

detector is required. The ScubaMate is

ideal for diving while the long stem allows

you to carry the control housing on your

waist or shoulder, or stem mounted, is

useful for searching on land or in shallow

water.

CONTROL FUNCTIONS

Power - Use to turn the detector on and

choose either of two search modes. A

battery check occurs automatically each

time the power is switched on. (Figure 1)

Threshold - Use to set the base audio

level according to an individual's hearing

ability and how loud the outside noise

is. Typically the sound is set no louder

than necessary, just above silent is

recommended. (Figure 1)

Figure 1, Panel Face

Elimination - Use in conjunction with

either the Standard or Discrete Trash

Elimination modes to choose the

elimination level appropriate to your

search needs. As the elimination knob is

rotated clockwise, an increasing number

of undesirable items are excluded from

detection. (Figure 1).

SEARCH MODES

Standard Trash Elimination and Discrete

Trash Elimination are the search modes

available with the Sea Hunter Mark II. The

selector switch for these modes is located

on the right side of the panel.

Standard Trash Elimination is the search

mode normally available on conventional

pulse induction (PI) metal detectors. The

background audio threshold is continuous

and remains close to the operator's

chosen level while responding to ongoing

variations in the detection signal. Small or

deep targets produce faint, weak signals

and large or shallow targets produce

loud, strong signals.

The elimination knob is used to change the

detector's ability to detect various types

of metal. As you rotate the elimination

knob clockwise, the detection response to

metals decreases. The detection response

to poor conductors, such as foil, nickel and

pull tabs decreases significantly more than

the response to good conductors such as

coins and fine jewelry. In Standard mode,

the response to poor conductors can be

eliminated effectively; however, if these

objects are too close to the searchcoil,

a detection response may occur. The

response to good conductors, although

somewhat diminished, remains relatively

strong. Some jewelry such as rings and

thin gold necklaces are found in the

middle of the conductivity range, so it's

important to dial in only the amount of

elimination needed for the search area.

Standard mode permits a very slow

searchcoil sweep, making it particularly

effective for pinpointing targets. It provides

the deepest possible detection and is

most useful in areas with little trash.

Discrete Trash Elimination is a search

mode exclusive to the Sea Hunter Mark

II. It is similar in operation to detectors

with a Motion Discrimination mode in that

it provides more precise and enhanced

target discrimination. The background

audio threshold remains at the chosen

level until the searchcoil passes over

targets in the knob's "accept" range,

at which time a sharp audio response,

a characteristic of all motion detectors,

occurs.

Figure 2 shows the typical detection

responses from various metals in both

Discrete (DIS) and Standard (Std) Trash

Elimination modes. Note that in Std 0

Figure 2

(Standard Mode with elimination at

0) metals can be detected at 100%

capability. As the elimination control is

increased in either search mode, the

response to various targets decreases.

Note that the response to many metals

decreases more rapidly in Standard

mode than in Discrete mode.

As with Standard mode, the elimination

knob is used to change the detector's

ability to detect various types of metal;

poor conductors can be eliminated while

only slightly reducing the detection of

better conductors. Although Discrete

mode appears to achieve less detection

depth in air tests, its ability to eliminate

undesirable items precisely, without

affecting desirable items, enable it to

outperform Standard mode in certain

situations. For example, when the

elimination control is set to exclude pull

tabs, it excludes pull tabs with little or no

effect on the detection response to most

thin gold rings (Figure 2).

To pinpoint in Discrete mode, you simply

sweep the searchcoil from to side to side

over a target. The searchcoil must remain

in motion to produce a detection response.

This mode is designed to provide superior

pulse induction target discrimination and

is extremely effective in areas with lots

of trash.

ASSEMBLY

1. Choose a desired operating / stem /

control housing configuration. Assemble

the stem and attach the control housing

as desired. (Figure 3,4,5).

Figure 3, ScubaMate

Figure 4, Full length with undercuff

Figure 5, Long stem with hip mount configurations

2. Attach the searchcoil to the lower

stem. Align the mounting holes of the

searchcoil and stem, insert the threaded

bolt through the holes and hand-tighten

the knobs; Do Not use tools. (Figure 6)

3. Wrap the cable around the stem

and secure it according to your

operating configuration. For a hip mount

configuration, use the adjustable strap to

secure the cable to the upper stem.

Figure 6, Parts needed to assemble stem and searchcoil

4. Ensure the searchcoil connector at

the rear of the control housing is clean

and the o-ring is well lubricated; add a

little silicon grease or petroleum jelly if

necessary. Do not coat connector pins

with lubricant. Insert coil connector and

gently hand tighten. Do not over tighten.

5. Repeat Step 4 when assembling the

headphone connector at the front of the

control housing.

6. Perform a battery test by switching on

the detector, noting the number of beeps

that occur. Scan a metal object to confirm

detection. If the batteries are low or the

detector fails to operate, verify that the

battery pack and batteries are aligned

properly.

OPERATING PROCEDURE

1. Switch on the detector and note the

results of the battery test represented by

a range of one to four beeps. Four beeps

indicate the batteries are full, one beep

indicates they must be replaced.

2. Select the Standard or Discrete Trash

Elimination mode.

3. Set the threshold knob to the desired

audio level. Typically the audio is set very

low; usually just above silent. How low

you set it depends on your hearing needs

and how loud the background noise is.

4. Set the elimination control to zero

or a low level until you examine your

search area and determine the kinds of

metal items you want eliminated from

detection. Then re-adjust it to a level that

maximizes your search goals.

FIELD RECOMMENDATIONS

Knowing the conditions of your search

and which items you want, or don't want,

to find will help you choose the search

mode and elimination setting which best

suits your needs.

Depending on your search goals, you

may want to set the elimination no higher

than necessary so that you can detect

most metals. You may even want to set

the elimination at zero so there is no

discrimination and all metals are detected.

Although you'll detect a lot of undesirable

items like foil and pull tabs, you won't

miss any desirable ones.

Methodically sweep the searchcoil

from side to side keeping it one or two

inches above the surface. Restrict your

sweeping speed to about one to two

feet per second. Overlap each sweep

by advancing the searchcoil by at least

a quarter of its diameter; one half is

recommended. Always scan in a straight

line (not a wide arc); it helps keep the

searchcoil level, reduces the likelihood of

lifting the searchcoil at the end of each

sweep and ensures the overlap sweeps

remain uniform.

Finally, it is important to remember that

any detection signal, no matter how

loud or faint, represents the sound of

metal and its source should always be

determined.

As with all PI detectors, eliminating iron

materials while in either mode is difficult

if not impossible. However, attaching a

magnet to the inside of your digging tool

can help separate bits of iron and other

debris from your treasure finds.

SEARCH & RECOVERY TIPS

Treasure Hunting

Research - The first rule of successful treasure

hunting, whether on land or in the sea is to do

your homework. Learn as much as you can

about the areas you want to search, the kind

of treasure you want to find and the best ways

to recover it. The better prepared you are the

greater your chances for success. The following

books by Charles Garrett, available from Garrett

Metal Detectors, or your local Authorized Garrett

Dealer, offer invaluable research, advice and

detailed information on search and recovery

techniques for hobbyists: How to Search Sand

and Surf;Treasure Hunting for Fun and Profit

and New Successful Coin Hunting.

Search popular gathering places - Survey the

beach to determine areas with lots of people

activity. A wealth of treasure, including lost

coins and jewelry, often lies hidden beneath

the sand. Other areas that can yield treasure

include footpaths, scenic spots, picnic or camp

sites, concession stands, dressing cabins,

water fountains, boat docks, boardwalks, sea

wall bases, bridges, channel-dredging

sites and sunken vessels.

Study surf and weather patterns -

Pay attention to storm, wind and tide

activity. Treasures from deepwater

vaults are often transferred to shallower

locations like tidal pools and water-filled

depressions near the shoreline. A beach

considered unproductive can suddenly

yield riches. Heavy storm waves often

unearth treasures like rings caught in

exposed rock and gravel areas. (Figure

7).

Figure 7, Surf Pattern

Use the right recovery tools - Use the

right tool for the job and you'll recover

treasure in no time. Knowing what you're

digging for and the kind of surface you're

digging into will help you choose the right

digging tool.

Double check your holes - After you

dig a target, re-scan the hole to make

sure you retrieved everything in and

around it; corroded and coral-encrusted

desirable items can be easily mistaken for

undesirable ones.

Law enforcement and industry - Law

enforcement agencies often depend on

metal detectors to help their investigative

teams recover stolen, lost or discarded

property, particularly material evidence

such as vehicles, weapons and stolen

goods.

Construction, forestry and lumber, and

landscaping are just a few industries that

use metal detectors to purge areas or

materials of unwanted or hazardous metal

items. Metal detectors have been used

to find a variety of hidden items, such

as pipes, scrap metal, nails embedded

in lumber, underground electrical power

cables and oil barrels.

Select zero discrimination - When used

for the purposes of law enforcement or

industry, the Sea Hunter Mark II, or any

metal detector for that matter, usually

requires little or no discrimination.

Underwater searches - The Sea Hunter

Mark II can locate both ferrous and

non ferrous metals concealed within and

below aquatic growth from bottom soil

and rocks, wood and other non-metallic

materials. Large items such as boats,

motors and safes can be located several

feet below the searchcoil. Locating

small, isolated items is more difficult and

requires a comprehensive grid search

with the detector.

Land searches - When searching near

wire fences, metal buildings, etc., make

sure that you scan the searchcoil parallel

to the structure.

CAUTIONS

1. To avoid acid damage you should

install high-quality alkaline or nickel metal

hydride batteries and always remove

them prior to storing the detector.

2. If the battery compartment becomes

flooded, remove the batteries immediately,

rinse the compartment with fresh water

and allow to air dry. The electronics

compartment is factory sealed and

should never be opened. The see-

through "helmet mask" window on the

front panel should remain clean and free

from condensation. If the window ever

displays moisture, you should contact the

Garrett factory as soon as possible.

3. Before diving, always examine the

searchcoil and headphone connectors

and battery cap. Verify the battery

strength by operating the detector for a

couple of minutes prior to field use.

4. Dive with extreme caution. Observe

diving practices to lessen the risk of

becoming entangled with the headphones

or coil cables. Ensure that the headphones'

vent holes are open prior to diving.

5. When using the hip mount configuration,

ensure that the belt will not interfere with

equipment removal in the event of an

emergency.

MAINTENANCE

1. Wash off any sand, salt and residue

from the detector immediately after each

use.

2. Avoid high, internal temperatures by

protecting the equipment from the sun.

Store equipment in a cool location; avoid

storage in a hot vehicle.

3. Take advantage of Garrett's preventative

maintenance program. For a small fee,

the factory will inspect the entire detector,

replace its seals and pressure test it.

Contact the factory for more details.

BATTERY REPLACEMENT

To access the battery pack, unscrew the

battery cap at the rear of the detector

housing, by hand. Do not use tools.

The o-ring should remain in the control

housing while the battery pack slides

out. When installing batteries ensure that

they are aligned with the correct polarity

(plus and minus) markings. Re-install the

battery pack by placing the contact end

of the housing inside first and pointing

downward (figure 8). Verify that the o-ring

is well-lubricated and free from debris.

Add a little silicon grease or petroleum

Figure 8, Proper battery pack re-installation

jelly, if necessary. Reinstall the battery

cap, hand tighten it until it is flush with

the housing and the two index marks are

aligned as shown (Figure 9).

Figure 9, Proper battery cap re-installation

RECOMMENDED ACCESSORIES

Using the right recovery tools is as

essential to treasure hunting as the

detector itself. Here are a few examples

of recovery tools and their uses (Figure

10).

A hand scoop is useful for dry sand and

shallow water recovery up to two feet.

A trowel is best for recovering items in

clay or gravel areas.

Tip: A strong magnet attached to the inside of a scoop will

help separate bits of wire and other iron debris from your

treasure finds.

Figure 10, Various commercially available recovery tools

SPECIFICATIONS

• Circuit type: Pulse Induction, automatic

cancellation of salt/iron mineralization.

• Frequency: 750 pulses per second

• Submersion depth: Up to 200 feet (65

meters) or seven atmospheres

• Buoyancy: Near neutral

• Batteries: Eight "AA"

• Battery life: Approximately 18-22 hours

• Control housing weight: 31 oz.

• Headphones: 11 oz.

• Sea Hunter Mark II with ScubaMate, no

headphones: 64 oz.

• Sea Hunter Mark II with long stem, no

headphones: 73 oz.

REPAIR SERVICE

If you have difficulty operating the Sea

Hunter Mark II, take a few minutes

to re-read this manual and check the

batteries, switches and connectors. If you

are unfamiliar with underwater detectors,

consult your local Authorized Garrett

Dealer or the Garrett factory.

If your Sea Hunter needs repair, you should

return it to the factory accompanied by a

detailed letter describing the problem(s).

Carefully pack the detector in its shipping

carton or other sturdy box, using packing

material or appropriate insulation to

protect the parts. Do not include the

stems or headphones unless they are

part of the problem. Return all coils,

unless the problem is mechanical.

Note: Remember to include your name,

address and daytime phone number with

your shipment.

Return your detector to:

Garrett Metal Detectors

1881 W. State St.

Garland, Texas 75042

Please allow one week from the receipt

date for the detector's inspection and/or

repair and another week for its return.

Garrett will automatically return the

detector via UPS or Parcel Post unless

you provide a written authorization that

instructs otherwise.

MORE INFORMATION

For further assistance, please contact the

Garrett Customer Service Department, at

1.800.527.4011 or 972.494.6151.

WARNING

The following measures must be observed

at all times.

Do not hunt in areas where electric lines,

gas/water pipelines, bombs or other

explosives may be buried.

Never trespass or hunt on private property

without permission.

National and state parks, monuments,

military sites, etc. are absolutely "off

limits".

Always exercise caution when digging

toward a target where the underground

conditions are unknown.

RECOMMENDED READING

There are a variety of books available

from Garrett that can teach you how to

use a metal detector effectively, give

you ideas about places to hunt and help

improve your search and recovery skills.

(All books are written by Charles Garrett

unless specified otherwise.)

The revised classic, Modern Metal

Detectors, is a book that provides

necessary, basic information on metal

detectors and their use.

The latest edition of Treasure Hunting

for Fun and Profit is written especially for

beginner hobbyists.

Looking for interesting places to hunt?

Why not check out Charles Garrett's

book, Ghost Town Treasures, or Bob

Marx's Buried Treasures You Can Find,

a book describing countless sites where

treasure is believed to exist.

New Successful Coin Hunting, You Can

Find Gold with a Metal Detector and How

To Search Sand and Surf are perfect

books for readers who have specific

hunting goals.

MIND YOUR MANNERS

Filling holes and obeying NO

TRESPASSING signs are just two of

the responsibilities of a dedicated metal

detector hobbyist. The sincere request

that Charles Garrett makes to everyone

who uses his equipment is to leave each

place they search in better condition than

they found it. Thousands of individuals

and organizations have adopted this

formal Code of Ethics for Metal Detector

Operators:

• I will respect private and public property,

all historical and archaeological sites

and will not metal detect on these sites

without proper permission.

• I will keep informed and obey all laws,

regulations and rules governing federal,

state and local public land.

• I will aid law enforcement officials

whenever possible.

• I will not willfully cause damage to property,

including fences, signs and buildings and I will

always fill the holes I dig.

• I will not destroy property, buildings, or the

remains of ghost towns and other deserted

structures.

• I will not leave litter or uncovered items lying

around. I will carry all trash and discarded

targets with me when I leave each search

area.

• I will observe the "Golden Rule" using good

outdoor manners and conducting myself at all

times in a manner that will enhance the public

image of everyone involved in the field of metal

detection.

Please send me the following RAM books:

(Please indicate number of copies desired.)

___ New Successful Coin Hunting ................... $9.95

___ Treasure Hunting for Fun and Prot ........ $9.95

___ Treasure Caches Can Be Found................ $9.95

___ Ghost Town Treasures ............................... $9.95

___ You Can Find Gold with a Metal Detector ... $9.95

___ Buried Treasures You Can Find .............. $14.95

___ Gold of the Americas................................. $9.95

___ New Modern Metal Detectors ................. $12.95

___ Gold Panning is Easy ................................ $9.95

___ How to Find Lost Treasure*...................... $3.95

___ How to Find Gold ..................................... $3.95

___ How to Search Sand and Surf ................... $3.95

* Free with the purchase of any other RAM book or

Garrett product. If you do not wish to purchase anything but

would like a free copy of How to Find Lost Treasure, mail $2.00

for postage and handling to the address below. U.S. orders only.

For international orders, contact international@garrett.com.

Please send payment to:

RAM Publishing Co.

1881 West State Street

Garland, Texas 75042

(Order form continued on back of this page)

RAM BOOKS ORDER FORM

MAIL-IN ORDER FORM

Add $2.00 for rst book, and $1.00 for each additional book

ordered for handling and shipping charges.

Total for books $______________

8.25% Tax (TX/CA residents) $______________

Handling Charge $______________

TOTAL $______________

Payment Options:

___ Enclosed check or money order

___ I prefer to order through:

___ American Express ___ MasterCard

___ Visa ___ Discover

Card Number: ______________________________

Expiration Date of Card: _____________________

Phone Number: ____________________________

Signature: _________________________________

Required on credit card purchases

Name: ____________________________________

Address: __________________________________

__________________________________

City/State/Zip: _____________________________

PATENT PROTECTION

Garrett's high tech instruments are

protected by one or more of the

following United States Patents and

other Patents Pending: 4,398,104,

4,423,377, 4,303,879, 4,334,191,

3,662,225, 4,162,969, 4,334,192,

4,488,115, 4,700,139, 4,709,213,

Design 274,704 and 297,221

G. B. Design 2,011,852

Australia Design

111,674.

Other patents pending.

All Garrett detectors are manufactured

in the United States of America.

1881 W. State Street

Garland, Texas 75042

Toll Free:1.800.527.4011

Tel: 972.494.6151

Fax: 972.494.1881

Email: sales@garrett.com

PN 1525400.D.0408

Garrett Metal Detectors Sea Hunter Mark Ii Users Manual

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