B&G H2000 Pilot *DISCONTINUED* - Manual (Page 26)

h2000 Autopilot User Manual
Part 2 - Operating Information
HB-0842-04
2-14
(2) The appropriate NMEA sentences are selected and
set to be transmitted. The minimum data requirement is
XTE (cross track error); however, XTE and Bearing to
Waypoint give the best steering performance. For
Autopilot operation select any of the following: RMB (best
option), XTE, APA, or APB together with BWR or BWC.
(3) The position fixer is switched ON and has the correct
current position.
(4) The signal and noise levels are within the
manufacturer's recommended limits.
(5) The Waypoints have been entered correctly, and the
Waypoint arrival alarm is switched ON.
(6) If using Waypoints in a route or sail plan (cruise
plan), the Waypoints have been entered correctly and in
the correct order, the direction of the route has been
selected and the route is enabled.
2.5.1 Steer to Waypoint Introduction
This mode of steering is available to both sail and powerboats. It is
also available for Autopilot Systems that are using either a Hydra
or Hercules Instrument System, interfaced with a compatible
position-fixing device using NMEA 0183 protocols.
The position fixer can be a GPS (Global Positioning System) or
Loran-C receiver; which in turn could be interfaced with a chart
plotter.
When engaged in WAYPT mode the Autopilot will steer a course
using Waypoint data from the position fixer or plotter programmed
with the Waypoint positions.
It is important to remember that when the Autopilot is steering to a
Waypoint using NMEA data, any erratic data or positional errors
generated by the position fixer will be transferred to the Autopilot
via the NMEA interface and the Instrument System. Position fixer
errors can be due to many causes including: poor reception, bad
satellite constellation, radio beacon chain transitions, local
geography (e.g. in a marina) and high power transmitters.