Compensating For Bearing Error; Compensating For Position Error - Furuno FEA-2107-BB Operator's Manual

22.5.3

Compensating for bearing error

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.
No manual gyro correction (left-hand figure)
• ARPA targets and radar overlay match perfectly.
• Chart features and radar overlay have some mismatch.
Manual gyro correction in use (right-hand figure)
• ARPA targets and radar overlay match perfectly.
• Chart features and radar overlay match perfectly.
22.5.4

Compensating for position error

Verifying position and alignment
See section 19.8.1 Position alignment by means of ECDIS.
Verifying 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.
22. Radar Overlay
22-11