Furuno FEA-2107 Operator's Manual page 496

29. Steering With Yokogawa PT-500A
29.8.5 Total lost position
Associated alarms
Alarm "4012...4016:
Position equipment error"
OR
Kalman filter detects jump,
etc.
Alarms "2000 Filter: Position
Within 30
unreliable" and "2006 Route:
seconds
Course jump possible."
After 2 If vessel is in linear part of
minutes and route alarm "2506 Route:
then every 4 Use AUTO control"
minutes
If vessel is in turning part of
route alarm "2514 Route:
NAVI complete turn"
After 4 Alarm "2475 Route Needs
minutes and filter ON"
then every 4
minutes
Within 10 Alarm "2497 Route Stop-
minutes Sensor fail."
29-18
Expected system performance
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 own ship position, SOG
and COG in red. The source
indication for SOG and COG is
"(LAST)".
Guidance for navigator
Reminder
What end user should do
Acknowledge alarms.
Study situation.
Acknowledge alarms.
Study situation.
Acknowledge alarms.
Study situation.
If vessel is in turning state, then
either keep steering mode NAVI
to complete the turn or change to
steering mode AUTO to stop
turning.
Acknowledge alarms.
Study situation.
If vessel is in turning state, then
either keep steering mode NAVI
to complete the turn or change to
steering mode AUTO to stop
turning.
Acknowledge alarms.
Study situation.
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