in reports

2022 Kilo Moana EM122/EM710 QAT Report

Vessel ID: R/V Kilo Moana
Multibeam System: EM122/EM710
Dates: May 22, 2022

  1. R/V Kilo Moana conducted pre-season Quality Assurance Testing for the EM122 and EM710 multibeam mapping systems, following a series of POS MV troubleshooting steps and a dry dock maintenance period
  2. Pre- and post-shipyard noise testing indicated stable/acceptable noise levels and no damage in the shipyard
  3. A multibeam sensor geometry review and POS MV GAMS antenna calibration proceeded normally prior to geometric calibrations (‘patch tests’) at proven sites off Oahu (used previously by multiple vessels)
  4. Calibration adjustments were reasonably small and applied after data collection
  5. Swath coverage was assessed for the EM122 using transit data, indicating trends similar to previous years
  6. Swath artifacts were noted for each system, which may be addressed by software/firmware updates and some runtime setting adjustments; the MAC is available to review additional data to try to identify the root causes
  7. Following the 2022 QAT, the MAC suggests several next steps:
    1. Kongsberg has released updates for these generations of EM systems that should be applied as soon as practicable; please consult with Kongsberg technical support to ensure both systems are up to date
    2. Based on their ages, both systems should undergo comprehensive impedance/admittance assessments (e.g., using a Cypher analyzer) to establish transducer array health; these direct measurements provide much more data than BISTs and will be useful for EOL/capital investment planning
  8. The MAC is available to assist with additional testing (possibly on-board if schedules and conditions align)

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