26. AUTOPILOT OPERATIONS
26-33
Lost speed (IEC 62065 Ed. 1)
*1
: PT-500A: CAUT ALM; PR-6000: RC; FAP-2000, FAP-3000: ALARM
Lost speed (IEC 62065 Ed. 2 (PR-9000))
Associated
alerts
Expected system
performance
Operator
action
• Speed log data, VTG
sentence lost. Alert
"30510 No FIlter
Source of COG/
SOG", Alert "30510
No Filter Source of
CTW/STW" given.
• Acknowledge alerts.
• Monitor situation.
Repeated
every two
minutes
• Alert "30853 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
"30851 Auto Pilot
Mode Conflict" are
generated at the EC-
DIS. The lamp
*1
on the
Autopilot’s Steering
Control Unit (or Con-
trol Panel) 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
• Speed log data, VTG
sentence lost. Alert
"30510 No Filter
Source of COG/SOG",
Alert "30510 No Filter
Source of CTW/STW"
given.
• Acknowledge alerts.
• Monitor situation.
Within 30
seconds
• Alert "156 Speed Fail-
ure"
• Acknowledge alerts.
• Monitor situation.
Within 10
minutes
• Alert "30851 Auto Pilot
Mode Conflict" is gen-
erated at the ECDIS.
The ALARM lamp on the
Autopilot’s Steering
Control Unit (or Control
Panel) lights.
• When the speed log or
VTG data is restored the
Alert "30854 Speed Re-
covered" appears.
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.