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Hand steering
Hand steering modes are:
•
Steering wheel
•
Wing steering control
•
Override tiller
While in hand steering mode the ECDIS system is displaying the rudder angle and indication of hand steering mode.
Trackpilot steering
•
Operator sets the required heading of the vessel
•
Turning radius is also set by operator (or in course control mode the rudder limit)
•
Turn is initiated by operator
ECDIS system displays required heading, radius, rate of turn and predicted turn. (also Curved EBL could be
displayed, but not in course control mode)
Waypoint mode
The ECDIS system will follow the planned track to next waypoint but with a moderate accuracy in order to have
more economic sailing (sailing in ocean areas).
When approaching the next waypoint the ECDIS system is pre alerting operator well before the turn and just before
the turn a second acknowledge is required.
The ECDIS system performs turns using planned radius.
Track mode
In track mode the planned track is followed at the maximum accuracy between the waypoints and also in the turn
(position controlled turn).
Approaching the waypoint in track mode is like in waypoint mode.
Radar assisted turns
Radar assisted track turns are defined from the radar with a help of curved EBL.
Turns are defined and started "ON-LINE" and performed with a constant radius. Turns can either be locked to the
geographical co-ordinates or relative to water.
All steering modes can be interrupted with the override tiller. The system is displaying the future ship position in all
steering modes. Whenever a constant radius turn is initiated, curved EBL is displayed.
Some radar models can be used also to set radius and to start course change. For more information, see "
Radar Steering" on page 366.
362 • • • • Steering with EMRI Trackpilot
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