30. Alarms
30-4
30.7 Description of Backup Navigator Alarm
Track Control System (=TCS) standard IEC 62065 require “Backup Navigator Alarm”. It is intended to be
connected to a Central Alarm System. The idea behind the IEC 62065 requirement for “Backup Navigator Alarm” is
that if the navigator on duty cannot handle the situation (i.e. he does not have time enough to check and to
acknowledge all track control related alarm) then more person(s) are called automatically to the bridge. Alarm
Transfer System included into Central Alarm System will then transfer “Backup Navigator Alarm” to intended
person(s).
If during Track Control (= Program track, Goto Track, Goto WP etc.) any of alarms listed below is unacknowledged
for more than 30 seconds then “Backup Navigator Alarm” closed contact relay is activated. Note that “Backup
Navigator Alarm” is not activated, if any of above alarms happens when the ship is not performing any Track
Control mode.
“Backup Navigator Alarm” is related to following alarms:
Alarm “2000 Filter: Position unreliable”
Alarm “2008 Filter: speed below xx KN”
Alarm “2010 Filter: Pos source change”
Alarm “2451 Route: WP approach alarm”
Alarm “2458 Route: Last WP approach”
Alarm “2488 Steering:Stop-System fail”
Alarm “2489 Route: Changed to Goto WP”
Alarm “2496 ProgTrack: Stop - Sensor Fail”
Alarm “2497 Route: Stop - Sensor Fail”
Alarm “4005: Gyro error”
Alarm “4006: Gyro error”
Alarm “4008: Log error”
Alarm “4008: Dual axis log (WT) error”
Alarm “4009: Dual axis log (BT) error”
Alarm “4012…4016: Position equipment error”
Alarm “4027…4031: Lost DGPS”
Alarm “4033: ARPA radar spd/crs error”
Alarm “4055: Gyro error (Trackpilot)”
If ECDIS is a part of a Track Control System, the “Backup Navigator Alarm” should be connected. If ECDIS is
NOT part of Track Control System, then “Backup Navigator Alarm” is not generated.
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