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2017 Healy Quality Assessment Report

Cruise ID: HLY17TA
Multibeam System: EM122
Dates: May 16-20, 2017

The USCGC Healy is equipped with a Kongsberg MaritimeEM122(12kHz)deepwater multibeam echosounder utilizing both a Seapath 330+ (primary) and Applanix POS/MV(secondary) positioning and attitude reference systems. This report describes the procedures and results from a review of system geometry, geometric calibrations(‘patch tests’),vessel noise testing, swath accuracy assessment, and swath coverage analysis conducted during cruise HE17TA (May 16-20, 2017)off the coast of Washington. These tests were conducted to verify functionality following earlier data collection challenges and shipyard maintenance. Figure 1 depicts the operational areas and tracklines for calibration, swath accuracy, and swath coverage data collection.

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