881A/L-GS Scanning Sonar
Doc No: 430-044-00
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32
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Suspend sonar operations, and mount the sonar on a level stable surface, or settle the ROV on a flat
bottom.
Select Options > Calibrate Gyro.
The message Calibrating Gyro will appear. Calibration takes approximately 30 seconds.
Once the message disappears, standard operation commences.
Note
: When using manual biasing, it is ESSENTIAL that the sonar remains completely stationary and at constant
temperature during gyro calibration. Any movement will cause undesirable drift in the gyro.
3.5.6.
Options > Enable Gyro Auto Bias
Realtime only.
Puts the sonar into auto bias mode where the sonar will continuously re-bias the gyro in real time. Disabling this
mode requires periodic manual calibration. See Section 3.5.5 Options > Calibrate Gyro.
Summary of Contents for 881A-GS
Page 41: ...881A L GS Scanning Sonar Doc No 430 044 00 Page 41 of 46 APPENDIX A HOT KEYS ...
Page 42: ...881A L GS Scanning Sonar Doc No 430 044 00 Page 42 of 46 ...
Page 44: ...881A L GS Scanning Sonar Doc No 430 044 00 Page 44 of 46 ...
Page 45: ...881A L GS Scanning Sonar Doc No 430 044 00 Page 45 of 46 ...
Page 46: ...881A L GS Scanning Sonar Doc No 430 044 00 Page 46 of 46 APPENDIX C SPEC SHEETS ...