Operator's Manual

26. AUTOPILOT OPERATIONS
26-27
Lost speed
*1
PT-500A: CAUT ALM; PR-6000: RC; FAP-2000, FAP-3000: ALARM
Low speed
Position discrepancy (position from only one GPS navigator is reliable)
Associated
alerts
Expected system
performance
Operator
action
• Speed log data, VTG
sentence lost. Alert
"901 No FIlter Source
of COG/SOG", Alert
"902 No Filter Source
of CTW/STW" given.
• Acknowledge alerts.
• Monitor situation.
Repeated
every two
minutes
• Alert "675 Use Man
Steering"
Guidance for navigator • Change immediately to
local Autopilot control.
• Acknowledge alerts.
Within 30
seconds
• Alert "156 Sensor
Failure"
• Acknowledge alerts.
• Monitor situation.
Within 10
minutes
• Alert "153 Track Con-
trol Stop"* and Alert
"665 Auto Pilot Mode
Conflict" are generat-
ed at the ECDIS. The
lamp
*1
on the Autopi-
lot’s Steering Control
Unit lights.
*Transferred to
BNWAS if not
acknowledged within
30 seconds.
TCS stops and
• If the ship is running
straight, actual heading
is used as set course.
• If the ship is turning,
last-set course and ra-
dius are used to com-
plete the turn.
• Acknowledge alerts.
• Monitor situation.
• Change the steering
mode to AUTO (HEAD-
ING CONTROL on
FAP-3000).
Associated
alerts
Expected system
performance
Operator
action
• Alert "159 Low Speed
Alarm".
• Acknowledge alerts.
• Monitor situation.
Associated
alerts
Expected system
performance
Operator
action
Precondition • If sensors in Filter calcu-
lation are NOT inside
operator selected posi-
tion discrepancy limit,
Alert "851 Sensor
Banned"* appears.
* “222 Position Discrep-
ancy” on FAP-2000.
• Monitor situation.