Furuno FEA-2107-BB - Lost Differential Position

30. Steering With TOKYO KEIKI Autopilot PR-6000
30-32
30.9.7 Lost differential position
Goto AW steering mode
Associated alarms (generated
at ECDIS)
Expected system performance What end operator
should do
• Alarm "4027…4031: Lost
DGPS" or "4012…4016:
Position equipment error."
• Acknowledge alarms.
• Study situation.
Within 90
seconds
• Alarm "2010 Filter: Pos
source changed."
• Acknowledge alarms.
• Study situation.
Within 30
seconds
• Alarm "2492 Route: Needs
diff pos."
• Goto AW requires differential
position.
• Acknowledge alarms.
• Study situation.
After 2
minutes
then every 4
minutes
• Alarm "2505 Route: Use
Goto OS."
• Guidance for navigator • Change to Goto OS
steering mode.
• Acknowledge alarm.
After 4
minutes
then every 4
minutes
• Alarm "2492 Route: Needs
diff pos."
• Reminder • Acknowledge alarms.
• Study situation.
Within 10
minutes
• Alarm "2489 Route: Changed
to Goto OS."
• Automatic change of steering
mode to Goto OS mode.
• Acknowledge alarms.
• Study situation.