8-2-16 Section 8: Autopilots
ST290 Instrument System Owner’s Handbook
In order of preference, the autopilot uses:
• Measured boat speed (speed through water)
• Speed over ground (SOG), if measured boat speed is not available.
• The cruise speed specified in Pilot Advanced Calibration (see
Section 8, Chapter 5), if neither measured boat speed or SOG are
available.
Waypoint arrival and advance
Note: Waypoint advance operates only if valid bearing to waypoint and
waypoint name information are available from the navigation system.
On arrival at a waypoint, the autopilot will display the Waypoint
Advance(NEXT WAYPOINT)screenand sound an alarm. The alarm screen
showsthe bearingto thenext waypointand the directionthe boatwill turn
to acquire the new heading.
• If it is safe to make the turn, press the TRACKbutton to accept thenew
heading. The autopilot will turn the boat and cancel the alarm.
• IfyoudonotpressTRACK then the boat will maintain the existing
heading. Pressing AUTO or STANDBY will cancel the alarm, aban-
don the track and return to automatic or manual mode as appropriate.
Figure 2-16: Waypoint Arrival and Advance
Target
waypoint
Old target
waypoint
New target
waypoint at 071˚
D5416-1
Next target
waypoint at 071˚
Waypoint arrival Waypoint advance
Message will "pop-up" in front of current view
81183_2 S8.book Page 16 Tuesday, May 6, 2003 9:08 AM
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