28. Trackpilot
28-29
28.9.3 Lost speed
Associated alarms (generated
at ECDIS)
Expected system performance What end user should do
• Sensor alarm, for example
Alarm “4008: Log error”,
“4012…4016: Position
equipment error”, etc.
• Acknowledge alarms.
• Study situation.
Within 30
seconds
• Alarm “2476 Route Needs
log sensor” or “2494
Progtrack: Needs log sens.”
• Acknowledge alarms.
• Study situation.
After 2
minutes and
then every 4
minutes
• Alarm “2506 Route: Use
Radius control” or “2504
Progtrack: Use Radius
Ctrl.”
• Guidance for navigator • Change immediately
to local autopilot
control.
• Acknowledge alarms.
After 4
minutes and
then every 4
minutes
• Alarm “2476 Route Needs
log sensor” or “2494
Progtrack: Needs log sens.”
• Reminder • Acknowledge alarms.
• Study situation.
Within 10
minutes
• Alarm “2496 ProgTrack
Stop-Sensor fail” or “2497
Route Stop-Sensor fail.”
• Automatic change of steering
mode to Radius Control mode.
• If ship is in linear part, actual
heading is used as set heading.
If ship is turning, last-set
heading and radius remain.
• Acknowledge alarms.
• Study situation.
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