GAPS - User Guide
9.2.2 INITIALIZING GAPS
If you turn off GAPS by pressing the GAPS power switch on the BOX, make sure to wait at
least 20 s before turning it on again
Do NOT transmit acoustically with GAPS in the air.
1. Check the power supply (24/36 V DC, 100/240 V AC).
2. Switch the BOX on.
GAPS is powered.
3. Launch your browser and enter the GAPS IP address https://xx.xx.xx.xx
The GAPS control web page opens.
4. Configure (or check if it has already been done) the GAPS network interface. See section 4.2.
5. If an arm or an hydrophone has been replaced, GAPSantenna must be calibrated.Please
check GAPSMaintenance User Guide for complete calibration procedure. In the other case,
no calibration is needed for GAPS before using it. Enter the misalignments and immersion of
the antenna. See section 4.3.
6. Configure the input and output if there are new sensors during this mission. See section 4.4.
7. Configure the tracking parameters. See section 5.1.
8. Configure the transponders that are going to be positioned during the mission. See section
5.3.
9. Enter the speed profile. See section 5.2
10. Press Start Tracking button.
The Start Tracking button is grayed and the Stop Tracking button is not grayed anymore.
GAPS starts its acoustic cycle. The INS needs 5 minutes to be operational.
11. Open the navigation window in order to check the acquired data. See section 9.3.
12. Perform the alignment of the INS (see section 9.2.1). Remain in static position or drifting (no
acceleration, no heading change) for the rough alignment (5 minutes). Perform the fine
alignment if necessary (20 minutes while performing steps or eight-shaped trajectory).
13. Start the survey.
MU-GAPS-AN-005-H - November 2019 143
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