Simrad Simrad CS68, Installation Manual

Page: 39 / 92

SOFTWARE CONFIGURATION
20221933 / E
33
Navigator Datum
Specification for differential GPS. Must be entered if Navigator or AIS
is selected as device type.
Valid flag
Antenna position
offset from ref. point
Values for antenna offset for Navigator and AIS devices.
All sensors refer to the vessel’s reference point. This point is
defined in
Ship settings , page 42. If no reference is defined, the
vessel’s center of gravity will be used as reference point.
If the antennas are mounted out of the reference point, the offset
x and y values for the antenna position must be entered into the
system to give the correct ship position.
If two equal navigators (GPS) with antennas are installed as indicated
on the figure below, and if correct antenna offset is entered, there
should be no position difference between them. The ship will obtain
the same position in the chart even if the sensors are exchanged!
If an ARPA/MARPA is connected to the CS system in order to receive
ARPA targets, the targets have to be correctly referenced to the CCRP
(no internal offset required).
The position for a GPS is the position of the antenna. The
position is given as an x and y offset relative to the vessel center,
with positive value forward and to starboard.
x
y
0,0
ANTENNA POSITION (+X, +Y)
ANTENNA POSITION (-X, -Y)