Furuno FEA-2107-BB - Total Lost Position

30. Steering With TOKYO KEIKI Autopilot PR-6000
30-31
30.9.6 Total lost position
Associated alarms (generated
at ECDIS)
Expected system performance What end operator
should do
• Alarm "4012…4016:
Position equipment error"
• OR
• Kalman filter detects jump,
etc.
• Acknowledge alarms.
• Study situation.
Within 30
seconds
• Alarms "2000 Filter: Position
unreliable" and "2006 Route:
Course jump possible."
• Kalman Filter is switched Off
and system uses dead reckoning
for positioning.
• If you have log or dual-axis log,
then dead reckoning is based on
them and gyro.
• If you have log or dual-axis log,
then dead reckoning is based on
last plausible speed from
position sensors. This is
indicated by showing your ship's
position, SOG and COG in red.
The source indication for SOG
and COG is "(LAST)".
• Acknowledge alarms.
• Study situation.
After 2
minutes
then every 4
minutes
• Alarm "2506 Route: Use
AUTO control"
• Guidance for navigator • Change immediately to
local autopilot control.
• Acknowledge alarms.
After 4
minutes
then every 4
minutes
• Alarm "2475 Route Needs
filter ON"
• Reminder • Acknowledge alarms.
• Study situation.
Within 10
minutes
• Alarm "2497 Route Stop-
Sensor fail."
• Acknowledge alarms.
• Study situation.
After Alarm
"2497 Route
Stop-Sensor
fail."
• Alarm "2471 RC/NAV-TC
STOP - Use AUTO" in
ECDIS is generated. Warning
lamp RC turns on and
steering mode indicator lamp
RC start flashing in Autopilot
control panel.
• If ship is in linear part, actual
heading is used as set course.
• If ship is turning, last set course
and radius are used to complete
the turn.
• Acknowledge alarms
• Study situation.
• Change steering mode
to "AUTO".