Chap t e r 3 : A d van c e d Oper at i o n
19
The autopilot takes account of vessel speed when computing course
changes to ensure optimum performance over a wide range of vessel
speeds. If speed data is available, the ST4000 Plus uses the measured
vessel speed. Otherwise, the Speed Over Ground (SOG) or specified
cruise speed is used, depending on the calibration setting (see Dealer
Setup in Chapter 5).
Vessel's speed
Vessel's
Waypoint arri val and advance
If your navigation receiver transmits valid NMEA waypoint number
and bearing to waypoint data, it is possible to advance from one
waypoint to the next by simply pressing track.
Arrival
As the vessel passes the target waypoint, the navigation receiver should
select (manually or automatically) the next target waypoint.
The ST4000 Plus detects the new target waypoint number, sounds the
Waypoint Advance alarm and displays the Waypoint Advance
information. This display shows the new bearing to waypoint and the
direction the boat will turn to acquire the new track.
D3564-1
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