Table of Contents
Advertisement
Preconditions for Route steering
General preconditions
Route steering requires that the position filter is used. See more in chapter Filter Operations. If you try to activate
any of the route steering modes without the filter, you get alarm "2470 Disabled: Needs filter on". If you try to
activate any of the route steering modes without independent speed source, you get alarm "2490 Disabled: Needs
log sensor".
Goto Track mode preconditions
Route steering with Goto Track mode requires that the you have at least one high precision position receiver
available and in use (Permanent indication FILTER HIGH in upper right hand corner of ECDIS screen). DGPS
and Syledis are accepted as high precision position receivers. Note that a standard GPS or a DGPS without
differential position available are not accepted as high precision position receivers. Route steering with Goto Track
mode requires also that you have at least either one log and position receiver or two position receivers available and
in use. If one of the conditions described above is lost during Goto Track mode then the system automatically
changes to Goto Waypoint mode and you get alarm "2489 Route: Changed to Goto WP".
How to activate Route steering
Route steering can be activated by pressing GOTO WAYPOINT or GOTO TRACK pushbutton in the trackpilot
panel. The lamp of the pressed pushbutton will start to flash and if the ECDIS accepts the requested route steering
mode, then the lamp will be turned permanently ON to indicate the used route steering mode.
If Go to waypoint is activated, indication "Route: goto wp"
appears in Route Monitor window of ECDIS display.
If Go to track is activated, indication "Route: goto track"
appears in Route Monitor window of ECDIS display.
When route steering is not used or if the ECDIS did not accept
the requested route steering mode, then 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 "2467 Disabled: Steering off", which tells that the ECDIS didn't have steering controlling permission at the
time of request. Check that you have properly enabled Trackpilot for steering.
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
Steering with EMRI Trackpilot • • • • 369
Advertisement
Table of Contents
