Furuno FEA-2107-BB - Low Speed

29. Steering With YOKOGAWA Autopilot PT-500A
29-17
29.8.4 Low speed
Associated alarms Expected system
performance
What end operator should do
Alarm "2008 Filter: Speed below
xx."
Acknowledge alarms.
Study situation.
Within 90
seconds
Alarm "2010 Filter: Pos source
change."
Acknowledge alarms.
Study situation.
Within 30
seconds
Alarm "2501 Route: Needs higher
Speed."
Acknowledge alarms.
Study situation.
After 2
minutes
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
then every 4
minutes
Alarm "2501 Route: Needs higher
Speed.
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.
After Alarm
"2497 Route
Stop-Sensor
fail."
If vessel is in linear part of route
alarm "2471 AP mode conflict - Use
AUTO" in ECDIS and alarm
"CAUTION-01 CHANGE TO
AUTO " on Autopilot control panel
If vessel is in turning part of route
alarm "2515 Conflict-NAVI compl.
Turn" in ECDIS and alarm
"CAUTION-01 NAVI COMPL
TURN" in Autopilot control panel.
After the turn is completed the
alarm changes in ECDIS as "2471
AP mode conflict - Use AUTO" and
in Autopilot control panel as
"CAUTION-01 CHANGE TO
AUTO "
If ship is in linear part,
actual heading is used as set
heading.
If ship is turning, last-set
heading and radius are used
to complete the turn as long
as Autopilot mode selector
is kept in position "NAVI".
Acknowledge alarms
Study situation.
If vessel is in linear part then
Change steering mode to
AUTO.
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.