Collision Avoidance Manuever During Automatic Route Steering; Stopping Or Modifying Pre-Enabled Route Turn - Furuno FEA-2107 Operator's Manual

28. Trackpilot
Alarm "2501 Route: Needs higher Speed" appears for any use of Goto Track with Kalman filter but speed below
limit set for track steering in Installation Parameters. Alarm 2501 will be repeated every four minutes for next ten
minutes and if condition still exists, alarm "2497 Route: Stop - Sensor Fail" is generated and steering mode is
automatically changed to Radius Control.
Alarm "2505 Route: Use Goto WP" is instruction for the operator to change steering mode to Goto WP. This alarm
is generated if there are not sufficient conditions to continue Goto Track (i.e. alarm 2492 or 2507 has been valid two
minutes). This alarm is repeated every four minutes.
Alarm "2506 Route: Use Radius control" is instruction for the operator to change steering mode to Radius Control.
This alarm is generated if there are not sufficient conditions to continue Goto Track (i.e. alarm 2475, 2476 or 2501
has been valid 2 minutes). This alarm is repeated every four minutes.
Alarm "2507 Route: Need sog/cog ref." appears if any use of Goto Track with Kalman filter but without direct
Speed Over Ground (SOG) and Course Over Ground (COG) available from position sensor(s) or from bottom track
of dual-axis log. If condition still exists after ten minutes, alarm "2489 Route: Changed to Goto WP" is generated
and steering mode is automatically changed to Goto WP.
28.5.8 Collision avoidance manuever during automatic route
steering
Often route steering is interrupted by a collision avoidance manuever, but there are also several other reasons to
interrupt route steering. You have several options with which to set the collision avoidance or any other manuever:
•
Use override tiller, direct rudder pump operation button or non-follow-up rudder control.
•
Use follow-up rudder control.
•
Use Trackpilot HEADING CONTROL.
•
Use Trackpilot RADIUS CONTROL.
•
Use Trackpilot Program Track.
To use any of the above Trackpilot modes, push the desired mode button and follow normal instructions. See
paragraph 28.4.5 "Summary of manual steering modes".
Now the route steering is disabled until the GO TO WAYPOINT or GO TO TRACK button is pushed again. Note
that in order to return to route steering the ship heading must point to the next waypoint, otherwise the alarm "2468
Disabled: Out of course" is generated.
28.5.9

Stopping or modifying pre-enabled route turn

There are two cases where the automatic route turn must be stopped or modified:
•
Because the turn cannot be performed up to the final value.
•
Because the turn which your ship will perform is outside of the planned turn. ( Too fast or too slow.)
You can also during turns use all methods described in the above-mentioned paragraph "Collision avoidance
manuever during automatic route steering". However, you may interrupt an automatic route steering turn and
continue it in the manual steering mode.
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