How To Compensate For Bearing Error; How To Compensate For Position Error - Furuno FEA-2807 Operator's Manual

23. Radar Overlay
23.6.3

How to compensate for bearing error

Bearing error can be compensated on the Ship and Route Parameters dialog box. To show this box, open the menu,
select Initial Settings, Navigation parameters, and Ship and route parameters.
There are two ways to compensate for gyro-induced bearing error:
1) Manual
Adjust value of manual gyro correction.
2) Table-based gyro speed/latitude correction (Note that the ECDIS's built-in correction facility doesn't correct
dynamic error, settling time after course change, etc.)
Turn On Gyro speed/latitude correction in the Ship and Route Parameters dialog box.
Drift compensation, Gyro error not available with some autopilots.
No manual gyro correction (left-hand figure)
•
TT and radar overlay match perfectly.
•
Chart features and radar overlay have some mismatch.
Manual gyro correction in use (right-hand figure)
•
TT and radar overlay match perfectly.
•
Chart features and radar overlay match perfectly.
23.6.4

How to compensate for position error

How to verify position and alignment
See section 19.9.1 "Position alignment by means of the ECDIS".
How to verify correct datum used in positioning
It is very important that output co-ordinates of a position device is the same as the ECDIS expects to receive,
otherwise you may get incorrect position in the ECDIS. Verify in position device configurations that output of co-
ordinates is WGS-84 and also check in the installation parameters of the ECIDS that it is set to receive position in
WGS-84 datum.
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Manual