Cruise ID: RR2301
Multibeam System: EM124/EM712
Dates: February 4-19, 2023
- R/V Roger Revelle (RR) underwent routine calibrations of the ship’s multibeam echosounders during an extended transit/cruise between Punta Arenas, Chile, and Cape Town, South Africa in February 2023; the MAC provided remote support for planning and data analysis leading up to and throughout the calibration
- Planning followed the standard MAC SAT/QAT checklist, focusing on calibrations at suitable sites within reasonable deviations along the transit route; these were completed in two phases with initial EM124 testing near Puntarenas, followed by EM124 re-calibration and EM712 calibration at suitable sites off Cape Town
- The initial EM124 calibration was completed with a TX array pitch error inadvertently held over from the 2020 EM124 and EM712 SAT; this was corrected for the second calibration, resulting in typically small adjustments
- During the approach to the second calibration area off Cape Town, an EM712 configuration error was detected and discussed over ship-to-ship calls between the MAC (at sea on another vessel) and technicians on board the Revelle; EM712 calibration was completed with the correct configuration and small results (as expected)
- This report describes the procedures and results for calibrations (‘patch tests’) of the EM124 and EM712
- The MAC thanks the Revelle’s shipboard technicians for collecting all QAT data, noticing data quality issues with the EM712, and following up quickly with questions to ensure successful calibrations for both systems
Attached Documents
Report:
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