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Pole Star Space Applications

Commercial-in-Confidence

DSAS Mk2 Ship Security Alert System

Pole Star Space Applications
DSAS Mk2 Ship Security Alert System
DSAS Mk2 Ship Security Alert Installation Guide

Document No: PS-TN-DSAS-MK2-SIG_V1.0

Issue No: 1.0 - Issue Date: March 2012

Pole Star Space Applications

Commercial-in-Confidence

DSAS Mk2 Ship Security Alert System

Configuration Page
DSAS Mk2 Ship Security Alert Installation Guide
	
	
	
	
	
	

Document No: 	
Issue No: 	
Date: 		
Summary: 	
Distribution: 	
Author: 		

PS-TN-DSAS-MK2-SIG_V1.0.doc
1.0
March 2012
DSAS Mk2 Ship Security Alert System installation guide
Unrestricted
Steve Bradbury

Author:

Steve Bradbury

15th February 2012

Technical Review:

John Duckworth / Philip Lane

22nd February 2012

Quality Review:

Sarah Gough

23rd February 2012

Amendment Record
ISSUE

DATE

1.00

March 2012

UPDATES
Initial release

AUTHOR
Steve Bradbury

© Pole Star Space Applications Limited, 2012

All rights reserved, No part of this document or any information appertaining to its content may be used, stored,
reproduced or transmitted in any form or by any means, including by photocopying, recording, taping, information
storage systems, without the prior permission of Pole Star Space Applications Limited.

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Table of Contents
CONFIGURATION PAGE - i

i

DSAS Mk2 SHIP SECURITY ALERT SYSTEM INSTALLATION GUIDE (V1.0)
SAFETY NOTICE

1

EQUIPMENT LIST

1

UNIT DESCRIPTION							

1

PREPARATION	

2

INSTALLATION							

3

SYSTEM OPERATION

5

MAINTENANCE	

5

INTERNAL CONNECTIONS	

6

SPECIFICATIONS

7

CHARGER BOARD LED DIAGNOSTICS					

8

SATELLITE TRANSCEIVER LED	

8

LINE DRAWINGS

10

List of Figures
FIGURE 1: DSAS MK2 SCHEMATIC

1

FIGURE 2: DSAS MK2 EXTERNAL CABLE PREPARATION

2

FIGURE 3: DSAS MK2 COMMUNICATOR MOUNTING AND LOOK ANGLES

3

FIGURE 4: DSAS MK2 EXPLODED VIEW

4

FIGURE 5: DSAS MK2 CONNECTIONS TO TERMINAL BLOCK

6

FIGURE 6: DSAS MK2 DIMENSIONS

7

FIGURE 7: DSAS Mk2 CIRCUIT BOARD

8

FIGURE 8: DSAS MK2 IDP690 DIAGNOSTIC LED AND MOBILE ID
FIGURE 9: DSAS MK2 BASE PLATE DIMENSIONS

9
10

FIGURE 10: DSAS MK2 ALERT ACTIVATION POINTS ASSEMBLY

11

FIGURE 11: DSAS MK2 PLAN VIEW

12

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DSAS Mk2 Ship Security Alert System Installation Guide (V1.0)
Installation of this unit should be undertaken in conjunction with the Company Security Officer.

1. Safety Notice
The procedures in this guide must be observed during installation, operation, service and repair
of this equipment. Failure to comply with these procedures violates safety standards of design,
manufacture and intended use of this equipment. Pole Star Space Applications Ltd assumes no
liability for the customer’s failure to comply with these procedures.

2. Equipment List
	
	
	
	
	
	
	
	
	

•	
•	
•	
•	
•	
•	
•	
•	
•	

1 x Inmarsat IsatData Pro satellite transceiver (SkyWave IDP-690)
1 x DSAS Mk2 power pack with multistage charger
1 x Stainless steel casing bracket
2 x Normally closed (N/C) alert activation points
4 x 4A fuses including 2 spares for FUSE1 & FUSE2
2 x 4A fuses including 1 spare for external 24V ship supply
1 x External fuse holder for external 24V ship supply
1 x Spare 2A 20mm quick blow fuse for FUSE3
Bolt kit

In addition to the above list, a marine standard 2-core cable (8-11.9mm diameter) will also be
required for the installation (not supplied). If a backed-up 24V DC supply is not available on the
vessel, then a Regulated DC Output Power Supply, 24V at 2 Amps will also be required.

3. Unit Description
The DSAS ship security alert system is self-contained requiring only mounting, connection to
power, and wiring of two alert activation points. The unit consists of a satellite transceiver, 18Ah
VRSLA power pack, and a multistage charger unit. The unit requires an external DC supply
to maintain the power pack charge. On disconnection of external power, the unit will operate
for approximately 5-7 days. Operation of the unit is completely automatic, and the only user
intervention that should be required after installation is to restore the external power supply in the
event of disconnection. Figure 1 below shows a schematic diagram of the unit.
Note: the unit must NOT be painted as this may inhibit transmission / reception of satellite signals.

Figure 1 - DSAS Mk2 schematic
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4. Preparation
The DSAS unit is shipped in a powered down state. To prepare the unit for operation,
undertake the following (this can be done during installation if required):
	

1.	 Remove the metal casing and plastic lid of the DSAS unit.

	
2.	 Locate the internal 4A input fuses FUSE1 and FUSE2 (next to power pack
		 input block J1, refer to Figure 11), and ensure the fuse holders are empty.
	
3.	 Replace plastic lid and metal top plate, ensuring the cut-out in the metal top
		 plate is located above the satellite transceiver (the transceiver is at opposite
		 end to the external power input plug).
	
4.	
		
		
		
		
		
		
		
		

The unit must be connected to a 24V DC power supply (ideally this should be a
backed-up supply such as the GMDSS power source) and requires a cable
loop for the alert activation points. Both external DC power and alert cabling
require two core cable with circular cross section of between 8 & 11.9m outside
diameter (OD) (figure of 8 cable is NOT suitable). A suitable cable would be a
soft tin annealed copper (ASTM B-33) flexible stranded cable, OD 10mm, in a
heavy duty flame proof arctic grade neoprene. If a 24V DC	 is not easily
available then a Regulated DC Output Power Supply, 24V at 2 Amps will
be required.

	
5.	
		
		
		
		

Before feeding the power supply and alert button cables through the cable
glands, it is advisable to prepare the cable by stripping at least 140mm of the
outer sheath from the cable as shown below. This will make it easier to
manipulate the cable inside the box. The outer sheath must be pushed all the
way through the gland in order to ensure a waterproof seal.

Figure 2: DSAS Mk2 external cable preparation

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5. Installation
The unit is supplied with an Installation checklist, which should be followed during installation.
To initiate formal warranty, each step of the installation should be checked off on the checklist on
completion.
For reference the unit footprint dimensions including Base metal casing are shown in Figure 9. In the
event of this unit replacing a DSAS Mk1 unit in existing position ALL METALWORK including BASE,
MUST be changed. The FIXING FOOTPRINT however remains the SAME.
To install the unit:
	

1.	 Select a suitable unit installation location, taking into consideration the following:

		 a.	
			
		 b.	
			
			
			
			
		 c.	
			
		 d.	
			
		 e.	
			

The transceiver requires a clear and unobstructed view of the sky in order to
communicate with the Inmarsat and GPS satellite constellations.
Obstructions within the look angle range (see Figure 3) are unavoidable in most
marine installations, but the important thing is to minimise them. As a rule of
thumb, it is useful to apply the rule: Safe distance = 29 x diameter of obstruction.
e.g. for a pole of 0.1 metres diameter, the safe distance is 29 x 0.1 = 2.9 metres.
This rule ensures that the obstruction covers no greater than 2 degrees arc.
The unit must be a minimum of 2 metres from any other communication system
and further if possible.
The unit should NOT be in the line of sight of any high-powered transmission
equipment such as radar.
The system should not be installed in any areas that are designated as
‘hazardous zones’.

Figure 3 - DSAS Mk2 communicator mounting and look angles
	
2.	 Securely fasten the bottom part of the metal casing to the vessel superstructure (the
		 casing is designed to be bolted down at the base with M8 bolts).
	
3.	 Connect the unit to the vessel power supply as per Figure 1. The internal connections to
		 the unit are given in Figure 5.
		
		

Note: the unit must be powered from a stable DC power supply - the input voltage
for the unit is 24V DC.

		
		

The power supply cable must be fed through the first cable gland and attached to the
charger board as per Figure 5.

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Note: The cable diameter must be in the range 8 – 11.9mm to ensure the IP68
environmental rating is not compromised.

	
4.	 Assemble and install the alert activation points as shown in Figure 10. Cabling must be
		 fed through the second cable gland and attached to the charger board as shown
		 in Figure 5.
		
		
		

Note: The alert activation points should be wired in series using normally closed
momentary action switches (terminals 1 & 3 in the supplied alert activation points)
– refer to Figure 1.

	
5.	 Connect fuse FUSE1, as shown in Figure 11. The charger board LED1 (status) should
		 follow a start up sequence as per section 10 (Charger Board LED Diagnostics). The
		 transceiver LED will flash 5 times and then turn off.
	

6.	 Connect fuse FUSE2 as shown in Figure 11.

		

Note: The unit may be damaged if the fuses are connected in the wrong order.

	
7.	 Replace the plastic lid of the unit and screw it down well to ensure a watertight seal,
		 being careful not to over tighten. Then bolt on the top of the metal casing, ensuring that
		 the cut-out portion is above the satellite transceiver as shown in Figure 4.
		
		

Note: The unit will not function if the cut-out portion of the metal casing is not over
the satellite transceiver.

Figure 4 - DSAS Mk2 exploded view
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9. When installation is complete, BOTH alert buttons should be tested individually. These
tests should be done in conjunction with the Company Security Officer or Pole Star
distributor, as they will need to check and reset the alerts.
Note: A correctly installed transceiver will work reliably at sea but it is important
to be aware that when the vessel is alongside in port there is an increased
probability of communication problems. In a port there is likely to be a high
concentration of interference sources from both land and vessel-based
communications equipment. High power VHF, UHF and microwave equipment can
all cause interference problems. Buildings, gantries and other large structures can
also cause problems in port by blocking the line of sight to the satellite.

6. System Operation
The DSAS unit operates automatically and requires no user intervention. When the satellite transceiver
unit is powered up, the transceiver LED will flash 5 times, then switch off. In normal operation the
transceiver LED will not flash unless it is has been power cycled. The charger board LED1(status) will
cycle through the diagnostic sequence (refer to Section - 10. Charger Board LED Diagnostics).
The unit will automatically switch over to its internal power supply in the event of input power failure.
The unit should operate independently for approximately 5-7 days. Once the external supply is
reconnected the power pack will recharge.
When pressed, each alert activation point triggers the unit to switch to alert reporting mode at a rate of
1 x alert position report every 30 minutes.

7. Maintenance
The internal power pack has an expected life of 2 years but this may vary considerably depending
upon operating conditions. It is tested automatically every 30 days and the results are sent to Pole Star
by the unit. Information on the current state of the power pack will be made available to the registered
owner of the unit to allow appropriate scheduling of replacements. Full instructions for replacement of
the power pack are included with the replacement unit.
If spare or replacement power packs or any other parts are required, or if you have any problems with
this unit, please contact your Company Security Officer or Pole Star distributor giving details of the
vessel name, customer name, Mobile ID (see Figure 8) and the nature of the problem / enquiry.

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8. Internal Connections

Figure 5 - DSAS Mk2 connections to terminal block

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9. Specifications

Figure 6 - DSAS Mk2 dimensions
Physical
Transceiver Dimensions

Length: 125.8mm x Width: 125.8mm x Height: 100.8mm

Transceiver Weight

460g

Environmental
Operating Temperature Range

–40ºC to +85ºC

Storage Temperature Range

–40ºC to +85ºC

Vibration

SAE J1455 (Sec 4.9, 4.2)
MIL-STD-810G (Sec 514.6)

Shock (survival)

MIL-STD-810G (Sec 516.6)

Transceiver Environmental Rating

IP67

Electrical
Input Voltage

24V DC

Power Consumption (Typical. @ 12V DC)

Receive with GPS: 60 mA
Transmit: 0.75A

Mating Connector

SA901020-001

Satellite
Coverage

Global

Frequency Range

Rx: 1525.0 to 1559.0 MHz
Tx: 1626.5 to 1660.5 MHz

Sensitivity

Aquisition: –136 dBm
Tracking: –146 dBm

EIRP

5.0 dBw

Elevation Angle Range

–15 to +90 degrees

GPS
Frequency

1575.42 MHz

Channels

16 parallel

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Certifications
Inmarsat, FCC, CE Mark, RoHS

10. Charger Board LED Diagnostics
There are 3 LED’s situated on the charger board.
LED1 – Provides the user with installation and fault finding diagnostic information.
LED2 – Indicates the power pack protection module has been activated.
LED3 – Used for factory testing – can be ignored.
Please refer to Figure 11 for LED locations.
LED

Colour

Flashing / Constant

Description

LED 1 (STATUS)

Red

Flashing

Checking 24V DC charge power available

LED 1 (STATUS)

Red

Constant

24V DC charge power OK, now checking power pack connected

LED 1 (STATUS)

Amber

Flashing

Power pack connected OK, now checking alert circuit connected

LED 1 (STATUS)

Amber

Constant

Alert circuit connected OK, now checking IDP-690 to DSAS comms

LED 1 (STATUS)

Green

Flashing

IDP-690 to DSAS comms OK, now checking for valid GPS position

LED 1 (STATUS)

Green

Constant

GPS position valid, DIAGNOSTIC TEST COMPLETED / PASSED

LED 2 (ERR)

Red

Flashes once on power up

Indicates power pack protection module start-up

LED 2 (ERR)

Red

Flashes continuously

Indicates power pack protection module has activated

LED 3 (TEST)

Yellow

Flashes once

Alert loop is opened

LED 3 (TEST)

Yellow

Flashes twice

Tamper switch is opened

LED 3 (TEST)

Yellow

Flashes three times

24V DC is disconnected

LED 3 (TEST)

Yellow

Flashes four times

24V DC is reconnected

LED 3 (TEST)

Yellow

Three fast flashes on power up

Power pack communication

LED 3 (TEST)

Yellow

One fast flash (every minute)

Power pack communication

LED 1 - (STATUS)
FUSE 3

LED 3 - (TEST)

LED 2 - (ERR)

FUSE 2
FUSE 1

Figure 7 - DSAS Mk2 Circuit Board
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11. Satellite Transceiver LED Diagnostics

Diagnostic LED (Status)

Mobile ID

Figure 8 - DSAS Mk2 IDP690 diagnostic LED and mobile ID
TRANSCEIVER LED
When the satellite transceiver unit is powered up, the transceiver LED will flash 5 times, then switch
off. In normal operation the transceiver LED will not flash unless it has been power cycled.

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12. Line Drawings

Figure 9 - DSAS Mk2 base plate dimensions

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Figure 10 - DSAS Mk2 alert activation points assembly

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Figure 11 - DSAS Mk2 plan view
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DSAS Unit
with IDP Communicator
Power Pack Removal
and Replacement Instructions

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WARRANTY FORM
Installation Checklist

This form and Installation Checklist will activate the guarantee and serve as a means of
quality control.
Return the form to:
Pole Star Space Applications Ltd
4th Floor
Compass House
22 Redan Place
London
W2 4SA
Or email to: dsas@polestarglobal.com
DSAS Serial number (on lid of unit):
Date:
Installer name:

DSAS Mk2 UNIT - INSTALLATION CHECKLIST
Unpack unit – check serial number (on the lid of the DSAS unit) and write it on the warranty form.
Visual check for completeness and good order – refer to equipment list on page 1 of Installation
Guide.
Open unit and ensure that all fuses are disconnected before proceeding.
Check the power pack – a voltage above 11V shows that the power pack is still holding a charge.
Below 11V the power pack should be put on charge before installing – ideally power packs
should be fully charged before installation. It may be worth putting the power packs on charge
while the rest of the installation is taking place.
Select a suitable installation position, with regard to the considerations listed in the Installation
Guide (page 3).
Prepare external cable assembly using two core cable of at least 8mm diameter (OD) (see cable
schematic on page 2 of the Installation Guide). Install the alert button in a suitable position, and
feed the power cable out to installation position. All loose cables should be secured with cable
ties or straps at approximately 30cm (1ft) distance.
Drill locating holes for DSAS assembly using the base of the metal casing as a template. The
unit must be mounted on a horizontal surface.
Attach the metal base plate to the installation position. M8 bolts are recommended for this. Do
not over tighten the bolts as they could sheer. A torque of 21Nm is recommended.
Place the DSAS unit on the metal base plate, and open the plastic lid of the box.
Ensure that the power packs are reconnected.
Feed the power supply and alert button cables through the unit cable glands and attach as
indicated in figure 5 of the installation guide. Tighten the glands using a 24mm spanner.
Insert FUSE1, THEN insert FUSE2 (see plan diagram in the installation guide, Figure 11).
PLEASE NOTE: The unit may be damaged if these fuses are not connected in the correct
order.
Ensure that the DSAS Mk2 unit is powered up. LED1(STATUS) should begin its diagnostic
sequence to indicate this.
Test the power input connections by applying power through the DC supply cable. When the unit
detects external power, LED3(TEST) will flash four times. When power is disconnected, LED3
should flash three times.
Test both of the alert buttons. When pressed, LED3(TEST) should flash once. Check that the
first alert message has been received by the office staff on shore, and reset before testing the
second button. Check that this alert message has also been received and reset.
Replace the plastic lid and assemble the rest of the casing around the unit using the bolts
supplied.
Ensure that the cut-out in the metal top plate is above the transceiver unit (the OPPOSITE
END to the cable glands).
Ensure that:
•	
The DSAS is securely attached to the vessel superstructure
•	
The venting plugs are not obstructed
Apply external power to the unit.
Indicate the position of the installation relative to the vessel hull and superstructure on the
diagram opposite.
The DSAS unit is now ready for use.

DONE

On the diagram below, please indicate the position of the DSAS unit installation relative to the
vessel, and also indicate any other superstructure and other potential obstacles to communication.

Address:

Telephone number:
Vessel name:
Customer / Company:
Customer / Company address:

Customer / Company contact name & position:
Customer / Company telephone number:
	
Customer / Company fax number:
Customer / Company email address:

Steel Power Pack - Removal and Refit
This describes power pack replacement for serial numbers 50001 upwards ONLY.
DO NOT TAMPER WITH THE POWER PACK.
THERE ARE NO USER SERVICEABLE PARTS INSIDE.
DO NOT OPEN UNIT OR DAMAGE SEALING IN ANY WAY.
Tools required: 	
			
1.	
2.	
3.	
4.	
5.	
6.	
7.	
8.	
9.	
10.	
11.	
	
	
12.	
13.	
	
14.	
	
15.	
	
16.	
	
17.	
18.	
	
19.	
	
20.	
	
21.	
	
22.	
23.	
	
24.	
25.	
	

• Phillips No 2 Screwdriver 		
• Spanner or Socket 10mm		

• Phillips No 4 Screwdriver
• Scalpel or cutting knife

Undo 8 x outer stainless steel case bolts with 10mm spanner (A).
Remove metal casing. Make a note of the orientation of cut out in lid section (B).
Undo 4 inner case bolts (with large Phillips screwdriver) and carefully remove plastic lid (C).
When removing lid take care not to move or damage micro-switch (N).
Remove FUSE1 to isolate from power pack (O).
Remove FUSE2 to isolate from ship supply.
Do not proceed until this has been done.
Undo 2 flat head screws either side of Skywave transmitter with large flat head screwdriver (D).
Remove plug connector from socket in corner of circuit board (E).
Hinge / Lift PCB panel to upright position (F). Do not over hinge the lid.
Remove green solid vent pipe from connector on end of old power pack (G, H, I and J). Hold
black collar (G) and push this towards the battery to release the grey locking collet. Using the
other hand pull gently on the solid green pipe to allow simple removal of solid green pipe.
Carefully slide out power pack case by handle (K) and remove.
Fit new case ensuring the pack is seated correctly into the base and up against the stop (L).
Lower the end with the handle and ensure it sits flush behind the lip (Inset L).
Replace vent tube onto the power pack by pushing the green vent tube firmly into the
connector (G). Gently pull back on green pipe to ensure seal secured.
Hinge down the PCB panel ensuring that the power lead does not get trapped between the
PCB panel (M) and power pack, replace flat head screws (D).
Connect new plug to socket on corner of circuit board (E) – ensure that the plug and socket
orientation is correct.
Replace FUSE1 to reconnect power pack (O).
Note the LED1(status) on the circuit board will now each come on to indicate that the supply is
re-connected correctly.
Replace FUSE2 to reconnect to the ships supply. LED3 (TEST) will flash four times to indicate
24V DC power is restored.
Functionality test. Wait two minutes. Operate micro switch (N) press and hold gently for 5
seconds and release. Ensure that LED3 (TEST) flashes twice.
Carefully replace the lid (C) ensuring that the seal is seated correctly between the inner case
halves. Take care to not damage or move the micro switch (N) when replacing the lid (C).
Re-tighten the screws in the corners of the lid (C).
Replace outer steel case lid remembering to maintain the correct orientation to the inner
satellite transmitter (B).
Replace and tighten the outer case bolts (A).
Confirm with the company security officer or Pole Star distributor that the message sent as a
result of step 21 was received.

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A

B

C

D

E

F

G

H

I
Pipe Stop

Stainless Steel Teeth

Collet

J

K

L

M

N

O
FUSES
F2
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FLAG APPROVAL DOCUMENT
SHIP SECURITY ALERT SYSTEM
UK Flag Approval Letter

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FLAG APPROVAL DOCUMENT
SHIP SECURITY ALERT SYSTEM
USCG Flag Approval Letter

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FLAG APPROVAL DOCUMENT
SHIP SECURITY ALERT SYSTEM
MSC.147(77) Acceptance Matrix
RESOLUTION MSC.147(77) (adopted on 29 May 2003)
ADOPTION OF THE REVISED PERFORMANCE STANDARDS
FOR A SHIP SECURITY ALERT SYSTEM
THE MARITIME SAFETY COMMITTEE,
	
RECALLING Article 28(b) of the Convention on the International Maritime
Organization concerning the functions of the Committee,
	
RECALLING ALSO resolution A.886(21), by which the Assembly resolved that
the functions of adopting performance standards for radio and navigational equipment,
as well as amendments thereto, shall be performed by the Maritime Safety Committee on
behalf of the Organization,
	
RECALLING FURTHER the provisions of the new chapter XI-2 of the
International Convention for the Safety of Life at Sea (SOLAS), 1974, as amended, and the
requirements of regulation XI-2/5, that all ships shall be provided with a ship security alert
system,
	
RECOGNIZING that, for security reasons, a ship security alert system is
necessary on board for initiating and transmitting a ship-to-shore security alert to a
competent authority designated by the Administration,
	
HAVING CONSIDERED the recommendation on revision of resolution
MSC.136(76) made by the Sub-Committee on Radiocommunications and Search and
Rescue at its seventh session,
1. 	
	

ADOPTS the Revised Recommendation on Performance Standards for a Ship 		
Security Alert System, set out in the Annex to the present resolution;

2. 	
RECOMMENDS Governments to ensure that a ship security alert system;
		 a. 	 if installed on after 1 July 2004 conforms to performance standards not 		
			
inferior to those specified in the Annex to the present resolution;
		 b.	 if installed before 1 July 2004 conforms to performance standards not 		
			
inferior to those specified in the Annex to the resolution MSC.136(76).

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FLAG APPROVAL DOCUMENT
SHIP SECURITY ALERT SYSTEM
MSC.147(77) Acceptance Matrix
RECOMMENDATION ON PERFORMANCE STANDARDS
FOR A SHIP SECURITY ALERT SYSTEM
1	

Introduction

1.1 The ship security alert system is provided to
a ship for the purpose of transmitting a security
alert to the shore to indicate to a competent
authority that the security of the ship is under
threat or has been compromised. It comprises a
minimum of two activation points, one of which
is on the navigation bridge. These initiate the
transmission of a ship security alert. The system
is intended to allow a covert activation to be
made which alerts the competent authority
ashore and does not raise an alarm on board
ship nor alert other ships.
1.2 As required by its Administration, the
competent authority receiving the alert notifies
the authority responsible for maritime security
within its Administration, the coastal State(s) in
whose vicinity the ship is presently operating, or
other Contracting Governments.

COMPLIANT – the system transmits a security
alert to the shore indicating to a competent
authority that the security of the ship is under
threat. It comprises two activation points that
initiate the transmission of the alert, one of which
is on the navigation bridge. Activation is covert,
so alerting the competent authority ashore
without raising an alarm on board ship or alerting
other ships.

1.3 The procedures for the use of the ship
security alert system and the location of the
activation points are given in the ship security
plan agreed by the Administration.
1.4 The ship security alert system may utilise the
radio installation provided for compliance with
chapter IV of the SOLAS Convention, other radio
systems provided for general communications or
dedicated radio systems.

PS-TN-DSAS-SIG_V1.0

COMPLIANT – note: the Vessel name, date /
time, lat / lon, plus other relevant parameters are
transmitted in the Exception Position Report to
the PurpleFinder server (the shore station) and
immediately routed via email to the nominated
competent authority and flagstate recipients.
Refer to Section 2.1.3 of the DSAS Ship Security
Alert System User Guide and Ship Security
Plan Interface document, ref: PS-BD-DSASUGSSPI_2.0.
COMPLIANT – the document PS-BD-DSASUGSSPI_2.0 allows for the definition of these
procedures.
COMPLIANT – note: the system utilises a
dedicated Inmarsat IDP service (non-GMDSS).

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FLAG APPROVAL DOCUMENT
SHIP SECURITY ALERT SYSTEM
MSC.147(77) Acceptance Matrix
2.	

General

2.1 In addition to complying with the general
requirements set out in resolution A.694(17)1, the
ship security alert system should comply with the
following performance standards.

2.2 The radio system used for the ship security
alert systems should comply with relevant
international standards.

3.	

Power supply

3.1 Where the ship security alert system is
powered from the ship’s main source of electrical
power, it should, in addition, be possible to
operate the system from an alternative source of
power.

4.	

COMPLIANT – the system has an internal 18 Ah
power source (lasting 5-6 days in full operating
mode). Refer to Section 2.1.2.

Activation points

4.1 Activation points should be capable of being
used on the navigation bridge and in other
locations. They should be protected against
inadvertent operation. It should not be necessary
for the user to remove seals or to break any lid or
cover in order to operate any control.

5.	

COMPLIANT - Mariner Systems (UK) Ltd Type
Approval Laboratory Test Report TL1587 state
that all tests meet or exceed the requirements
of the guidelines laid out in IACS Unified
Requirement E10 and the relevant sections of
IEC945.
COMPLIANT – the system utilises the CE
certified and Inmarsat-approved Skywave
DMR200 Inmarsat D+ satellite transceiver.

COMPLIANT – the alert activation point(s) are
press-type switches of a dimension easily
installed on the navigation bridge and in other
locations. They are protected against inadvertent
use by a flip-up lid.

Operation

5.1 The activation points should operate a radio
system such that transmission of the security
alert does not require any adjustment of the radio
system, i.e. tuning of channels, setting of modes
or menu options. Operation of the activation point
should not cause any alarm or indication to be
raised on the ship.
5.2 The operation of the ship security alert
system should not impair the functionality of the
GMDSS installation.
PS-TN-DSAS-MK2-SIG_V1.0

COMPLIANT – the alert activation point(s) are
press-type switches causing the immediate
transmission of an Exception Position Report
to the PurpleFinder server. No system adjustment
is required, nor is any alarm or indication raised
on the ship.
COMPLIANT – note: the system utilises a
dedicated Inmarsat IDP service (non-GMDSS).

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FLAG APPROVAL DOCUMENT
SHIP SECURITY ALERT SYSTEM
MSC.147(77) Acceptance Matrix
6.	

Transmission of security alerts

6.1 In all cases, transmission initiated by security
alert system activation points should include a
unique code/identifier indicating that the alert has
not been generated in accordance with GMDSS
distress procedures. The transmission
should include the ship identity and current
position associated with a date and time. The
transmission should be addressed to a shore
station and should not be addressed to ship
stations.
6.2 The ship security alert system, when
activated, should continue the ship security alert
until deactivated and/or reset.

7.	

COMPLIANT – The system automatically alerts
each 30 minutes until deactivated and/or reset.

Testing

7.1 The ship security alert system should be
capable of being tested.

1

COMPLIANT – note: the system utilises a
dedicated Inmarsat IDP service (non-GMDSS).
Vessel name, date / time, lat / lon, plus other
relevant parameters are transmitted in the
Exception Position Report to the PurpleFinder
server (the shore station) and immediately
routed via email to the nominated competent
authority and flag-state recipients. Refer to
Section 2.1.3.

COMPLIANT – The system is tested through a
controlled hybrid Sat-C messaging / DSAS
alerting mechanism, a full audit trail is reported.

Publication IEC60945

PS-TN-DSAS-MK2-SIG_V1.0

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