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