Table of Contents
Advertisement
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 manoeuvres 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
course to start the route steering has more difference than set by the user in the Route start limit angle of Route
Parameters.
Alarm "2464 Route: No selected route", which tells that the 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.
Arrival to a Waypoint
The ECDIS system uses with Yokogawa autopilot a rule known as DNV. NOTE The autopilot interface do not fulfil
all DNV requirements.
Automatic route steering navigation tries to keep the ship always inside the channel limits and going to next
waypoint. Well before the next waypoint, there will be an alarm 2485 ROUTE WP PREWARING. As soon as
the alarm appears verify that the manoeuvre is safe and there are no dangerous targets. If the manoeuvre can be
performed press ACKN. WARNING pushbutton. If the manoeuvre is impossible you can leave the automatic route
steering by leaving REMOTE mode of the Yokogawa autopilot.
388 • • • • Steering with Yokogawa Autopilot
Advertisement
Table of Contents
