EM124

There are 7 posts tagged EM124 (this is page 1 of 1).

2024 R/V Sally Ride EM712/EM124 QAT & Seapath 380-R3 SAT

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:
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2024 R/V Armstrong EM712/EM124 SAT

Cruise ID: AR81-02 Multibeam System: EM124/EM712 Dates: March 14-20, 2024 R/V Neil Armstrong (AR) received several significant upgrades to its multibeam mapping systems during the 2023-24 winter shipyard period in Charleston, South Carolina Primary upgrades included: Replacement of the original EM122 with an EM124 (1.0° TX / 2.0° RX) Replacement of the original EM710 with an EM712 (0.5° TX / 1.0° RX) Installation of a Seapath 380-R3 navigation system with a MGC-R3 Comprehensive new survey of vessel and sensor offsets by Aegis Metrology Installation of new permanent benchmarks at strategic hull locations The MAC was asked to assist with conducting Sea Acceptance Testing (SAT) of the new EM124 and EM712 systems using the Seapath 380-R3; SAT work for a new SBP29 was carried out in tandem by other teams Due to schedule constraints, the MAC provided remote support from shore throughout the SAT; the on-board mapping team included SSSG personnel
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2024 R/V Revelle EM712/EM124 QAT

Cruise ID: RR2401 Multibeam System: EM712/EM124 Dates: February 12, 2024 During the winter 2023-24 maintenance period, the R/V Roger Revelle (RR) underwent significant engine work and received a new Seapath 380 receiver and HMI (the MRU 5+ and antennas were not modified) The Multibeam Advisory Committee (MAC) was asked to assist with routine Quality Assurance Testing (QAT) for the ship’s multibeam echosounders; due to scheduling conflicts, the MAC provided remote support for planning and data analysis leading up to and throughout the QAT Planning followed the standard MAC SAT/QAT checklist, starting with configuration review, hardware health, and noise testing following the engine work; calibrations for both systems were carried out at proven sites near San Diego used by a variety of vessels (e.g., 2023 Sally Ride EM124 and EM712 QAT) Dockside configuration reviews indicated a rollback to outdated offsets for the EM124 (e.g., potentially by loading an older PU parameters
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