28. Trackpilot
28-30
28.9.4 Low speed
Associated alarms (generated
at ECDIS)
Expected system performance What end user should do
• Alarm “2008 Filter: Speed
below xx.”
• Acknowledge alarms.
• Study situation.
Within 90
seconds
• Alarm “2010 Filter: Pos
source change.”
• Acknowledge alarms.
• Study situation.
Within 30
seconds
• Alarm “2503 ProgTrack:
Needs higher Speed” or
“2501 Route: Needs higher
Speed.”
• 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 2
minutes
• Alarm “2503 ProgTrack:
Needs higher Speed” or
“2501 Route: Needs higher
Speed.”
• Reminder • Acknowledge alarms.
• Study situation.
Within 10
minutes
• Alarm “2496 ProgTrack
Stop-Sensor fail” or Alarm
“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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