B&G Network Pilot - Manual (Page 15)

15
NAV MODE - ADDITIONAL INFORMATION
When the autopilot in engaged in NAV mode it will steer a
course using waypoint data from a position fixer programmed
with the waypoint positions.
The position fixer can be any GPS (Global Positioning
System), DECCA or LORAN-C receiver, with a compatible
NMEA 0183 (v1.5) interface.
POSITION FIXER ERRORS
It is important to remember that when the autopilot is steering
to NAV, any erratic or positional errors generated by the
position fixer due to poor reception, bad satellite constellation
or radio beacon chain transitions, will be transferred to the
autopilot via the NMEA interface. This could cause steering
inaccuracy so always maintain a log and positional plot on a
current chart. Also ensure that the autopilot course will steer
you clear of any obstacles, taking into account tides.
Before using your position fixer to steer to NAV, check the
following:
• The position fixer has a compatible NMEA 0183 (v1.5)
interface, set-up and connected in accordance with the
manufacturers instructions.
• It is switched on and has the correct current position.
• The signal and noise levels are within the manufacturers
recommended levels.
• The waypoint have been entered correctly, and the
waypoint arrival alarm switched on (if it has one).
• If using waypoints in a Route or Sail (cruise) Plan, they
are entered correctly and the route is enabled.