Furuno FEA-2107 - Page 498

29. Steering With Yokogawa PT-500A
29-20
29.8.6 Lost differential position and position discrepancy
Associated alarms Expected system performance What end user should do
Precondition If sensors in Filter
calculation are NOT
inside
user chosen position
discrepancy limit.
Alarm “2007 Position
discrepancy”
Acknowledge alarms.
Study situation.
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 “2478 Route: Needs
good Pos”
Acknowledge alarms.
Study situation.
After 2
minutes and
then every 4
minutes
If vessel is in linear part of
route alarm “2506 Route:
Use AUTO control”
If vessel is in turning part of
route alarm “2514 Route:
NAVI complete turn”
Guidance for navigator 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.
After 4
minutes and
then every 4
minutes
Alarm “2478 Route: Needs
good Pos”
Reminder 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.
Within 10
minutes
Alarm “2497 Route Stop-
Sensor fail.”
Acknowledge alarms.
Study situation.
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