Raymarine GPS navigation User Manual
Page 32
on track in the center. The
XTE
value will be set to “0.00
since the vessel
is
ON
the track line.
Ideally, the helmsman sets the vessel’s heading with his steering compass
or autopilot to the bearing shown for the
destination and begins
watching the
scale at the top of the
NAV
display, the
digital value,
or the active graphic
screen.
The helmsman then provides steering correction to keep the boat symbol
on the track line or if watching the digital
values, keep the digital value
at or near O.OOnm. This should take the vessel in the most direct path to the
destination
while correcting for wind and current offsets along the
way. A good check point of correct steering is that your
COG
readout
eventually reads the original bearing to the waypoint, even though your actual
compass heading may be somewhat different.
Sometimes when steering to destinations it may be necessary to change
heading to avoid obstacles or other vessels in your path. Having deviated off
of your intended track, in many cases it’s easier just to start a new track from
where you are, than to return to the old track-to-waypoint.
To start a new track, just press
followed by the numbers
of the same waypoint. Then press
and the
NAV
unit will
recalculate bearings, distance and
TTG
for the new track to the old destination
waypoint. The vessel is now
ON
the origin of the new intended track line and
the new bearing and distance to the destination is displayed. The
XTE
value
will be reset to “0.00 nm” since the vessel is
ON
the new line.
Sometimes you may prefer to turn
OFF
the
destination calculation
and
displays. To turn
OFF
the
GOT0
operation press
and
type 0,
NO
will appear on the displays in the message
area and
data will disappear from the
NMEA
0 183 data output.
If you have not yet stored any waypoints, you will hear multiple beeps when
is pressed. You will need to first save an Event or enter some
coordinates directly into the
memories using one of the
methods discussed in section 3.6 of this chapter.
key will also
give an error signal if you select an empty memory number by accident.
coordinates must be stored in the memory before it can be selected
as a destination.
OPERATION 3-18
. . . .