Alarm Problems

11 Aug 2011 Resource

Dear Sirs,
The following problems have been reported from one of our ships:
AIS model R4 AIS Transponder is installed on board the vessel. Maker: SAAB Rosemount, Saab Marine Electronics Singapore Pte. Ltd.

1. Four alarms appear together in very quick succession. The time interval between these alarms in less than a second. Once acknowledged alarms reapear on the display unit. They disapear after 2-3 acknowledgements. Following are the alarms:
- External EPFS Failure
- No valid Sensor Position
- No valid SOG Information
- No valid COG Information.
2. Some other alarms are activated once a day or two:
- Lost Heading
- Invalid Heading
- Alarm ID 32 or 25
- Invalid Course over Ground
- Lost Course over ground
- Lost Signal
- A4 AIS System Signal failure
3. Data of various ships disappears some time and reappears again in few minutes.
4. On some targets only MMSI number appears with no other information.

Best regards
Supdt. Fleet Operations

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