Raymarine autopilot control unit - Manual (Page 38)

Chapter 3: Advanced Operation 21
Tidal Stream Compensation
Under most conditions, Track mode will hold the selected track to
within ±0.05 nm (300 ft) or better. 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 ST7000 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 4).
Vessel's speed
Vessel's
Waypoint Arrival 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 pressing
track. In order for the waypoint
advance function to work, there must be at least one character
difference in the names of adjacent waypoints.
Arrival
As the vessel passes the target waypoint, the navigation receiver selects
(manually or automatically) the next target waypoint.
The ST7000 Plus detects the new target waypoint number, sounds the
Waypoint Advance alarm and displays Waypoint Advance
information. This display shows the new bearing to waypoint and the
direction the boat will turn to acquire the new track.
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