SAT

There are 26 posts tagged SAT (this is page 1 of 3).

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 David Packard EM304 MKII SAT

Cruise ID: R/V David Packard Multibeam System: EM304 MKII Dates: February 15-17, 2024 R/V David Packard undertook a series of sea acceptance trials (SAT) for the ship’s new Seapath 380 / MGC-R3 navigation system and EM304 MKII multibeam echosounder in the vicinity of Vigo, Spain between 15-17 Feb 2024; a combination of contract SAT activities were completed by Kongsberg for Freire Shipyard in tandem with independent pre-SAT and SAT assessments conducted by Johnson and Jerram for MBARI Two important factors will impact performance of this particular EM304 MKII: The high voltage power supply has been reduced by Kongsberg from 130V to 105V to avoid damages observed with other EM304 MKII and EM124 systems; the impacts on performance are not clear at this point, and these concerns have been noted in the signed SAT documents with Kongsberg The ice windows cause acoustic attenuation during TX and RX that will reduce the
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