Ship ID: R/V Sally Ride
Multibeam System: EM712/EM124/Seapath 380-R3
Dates: April 3-5, 2024
- R/V Sally Ride (SR) received an upgrade of its Seapath 330 navigation system to dual Seapath 380s
- The primary Seapath 380 employs a new Seapath MGC-R3 (“Seapath 380-R3”) and the secondary Seapath 380 uses the pre-existing MRU 5+ (“Seapath 380-5+”); both systems are logged by the EM124 and EM712
- While no changes were made to the MRU 5+ installation, the original Seapath antenna locations were modified for a longer baseline and a second antenna pair was added; all Seapath antennas are NovAtel GNSS-850 units
- A new survey was conducted by Westlake Consultants to determine the installation offsets of the new MGC-R3 and new antenna locations using the existing reference frame (established by IMTEC during the 2021 SBP29 installation and EM124 topside upgrade)
- The Sally Ride conducted routine quality assurance testing (QAT) between April 3-5, 2023, focusing on:
- Configuration review and calibrations (‘patch tests’) for both EM systems with both Seapath 380s
- RX noise level vs. speed testing
- Swath coverage testing
- The Multibeam Advisory Committee (MAC) assisted with test planning, configuration review, and data processing in collaboration with SIO and SR personnel
- Planning followed the standard MAC SAT/QAT checklist, starting with hardware health, RX noise testing, and calibration; swath coverage data were collected opportunistically for the EM124 on a transit (no EM712 data)
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