G-PILOT 3100 Operation Manual NAVMAN 19
The G-PILOT 3100 has three ways of steering the boat, compass, GPS and wind. To select an
appropriate mode, see section 2-4. In GPS mode, the G-PILOT uses data from a GPS to steer
the boat along a route or to a waypoint.
5-1 GPS navigation data
Example of navigating to a waypoint:
DTG (distance)
TTG (time)
BRG (bearing)
SOG (speed)
Course error (angle)
CTS (bearing)
Plotted course
XTE (distance)
The boat is sailing from the start to the destination and has moved off the GPS plotted course
from the start to the destination:
BRG Bearing to destination The bearing to the destination from the boat.
Course error The difference between CTS and the boat heading.
CTS Course to steer Optimum course to steer to return to the plotted course.
DTG Distance to go Distance from the boat to the destination.
SOG Speed over ground The current boat speed over the ground. This is not necessarily
the same as the boat speed through the water nor the speed
at which the boat is approaching the destination.
TTG Time to go The estimated time to reach the destination.
XTE Cross track error The distance from the boat to the nearest point of the plotted
course. XTE may have a letter: R means steer to the right to
return to the plotted course, L means steer to the left.
5 GPS steering mode
COG (bearing)
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