Activating Route Steering - Furuno FEA-2107 Operator's Manual

29. Steering With Yokogawa PT-500A
29.4.4

Activating route steering

Activate route steering by selecting mode "NAVI" in the Yokogawa autopilot panel.
Track
If "NAVI" is selected, indication "Track" appears in Route
Monitor window of ECDIS display.
If the ECDIS did not accept the requested route steering mode,
then there is an "Autopilot Conflict" indication in Route
Monitor window of the ECDIS Display.
Also alarms "2470 Disabled: Needs filter on" and "2471 AP
mode Conflict - Use AUTO" appear.
In Yokogawa steering control unit text "Caution-01 CHANGE
TO AUTO" appears with buzzer sound.
When route steering is not used, there is an empty indication in
Route Monitor window of the ECDIS Display
There are several reasons why the requested route steering mode cannot be accepted:
Alarm "2470 Disabled: Needs filter on," which tells that you didn't have the Kalman filter operative and selected in
ON position at the time of request. Route steering requires that you use Kalman filter, because the filter eliminates
sudden jumps of the position and thus prevents unpredictable maneuvers of the own ship. Check your selection of
the sensors. See more information at Filter Operation
Alarm "2490 Disabled: Needs log sensor", which tells that the Kalman filter did not have an independent speed
source. You need either a log, a dual axis log or two position receivers. Check your selection of the sensors. See
more information at Filter Operation
Alarm "2468 Disabled: Out of course", which tells that the current heading of the own ship and the required set
heading to start the route steering has more difference than set by the user in the Route start limit angle of Route
Parameters.
Alarm "2471 AP mode Conflict - Use AUTO", which tells that ECDIS and Yokogawa autopilot cannot perform
route steering mode. First change mode from "NAVI" to "AUTO" and then check that preconditions for route
steering are fulfilled.
Alarm "2477 Disabled: Out of channel", which tells that the current location of ship is not inside channel of
Monitored route.
Alarm "2464 Route: No selected route", which tells that there is no route selected for Route Monitoring.
Alarm "2465 Route: Illegal WP", which tells that the there is a route selected for Route Monitoring, but the
selection of the next or final waypoint is missing or illegal.
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