Vessel Geometry and MBES Offset Recommendations

Vessel survey reports (VSRs) play a critical role throughout service life (10+ years) of a multibeam echosounder system (MBES) and provide the foundation for future vessel and sensor surveys. This document provides recommendations for VSRs that minimize opportunity for errors in the configuration of MBES and ancillary sensors.

2017 Kilo Moana Quality Assessment Visit

Multibeam System: 

During the late fall of 2016 and spring of 2017 the University of Hawaii’s Ocean Technology Group (OTG) submitted bathymetric data, screen shots (Figure 1), and built in self-test (BIST) data to the Multibeam Advisory Committee (MAC) and to Gates Acoustic documenting pervasive noise which was affecting the R/V Kilo Moana’s Kongsberg EM122 multibeam echosounder system’s (MBES) ability to collect high-quality bathymetric data.

2017 Healy Quality Assessment Report

Multibeam System: 

TheUSCGC Healyis equipped with a Kongsberg MaritimeEM122(12kHz)deepwater multibeam echosounderutilizingboth a Seapath 330+ (primary) and Applanix POS/MV(secondary) positioning and attitude referencesystems. 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 coverageanalysis conductedduring cruise HE17TA (May 16-20, 2017)off the coast of Washington.

2016 Sally Ride System Review

Multibeam System: 

The R/V Sally Ride is equipped with a Kongsberg Maritime EM122 (12 kHz) and EM712 (40-100 kHz)
multibeam echosounders both utilizing a Seapath 330+ (primary) and iXBlue HYDRINS (secondary)
positioning and attitude reference system. This report describes the procedures and results from a
review of system geometry, geometric calibrations (‘patch tests’), and assessments of swath accuracy
and swath coverage conducted during cruise SR1601 (July 25-28, 2016) off the coast of Washington.
These tests were conducted to verify functionality and data quality at the beginning of each multibeam

E/V Nautilus Spring 2017 Quality Assessment Report

Multibeam System: 
The E/V Nautilus undertook a multibeam echosounder quality assurance test from May 1 to May 5, 2017 during an engineering shakedown leg (NA079) in order to perform an assessment of the vessel’s Kongsberg EM302 multibeam echosounder. Data were collected near the Southern Channel Islands (Figure 1), offshore from San Pedro, California. Paul Johnson and Lindsay Gee provided logistical and technical support for mission planning, data collection, and analysis.

Summary and Recommendations:

Tool: Sound Speed Manager (SSM)

Sound Speed Manager (SSM) aims to merge together functionalities present in three existing applications that process sound speed profiles (SSP) for underwater acoustic systems: NOAA Velocity, MAC SVP Editor, and HydrOffice SSP Manager.

RV Sikuliaq 2016 Calibration Report


The R/V Sikuliaq is equipped with Kongsberg Maritime (KM) EM302 (30 kHz) and EM710 (70-100 kHz) multibeam echosounders and a Seapath 320 positioning and attitude system with C-NAV DGNSS auxiliary input. These systems were reviewed by the Multibeam Advisory Committee (MAC) and personnel from NOAA, the University of Alaska Fairbanks (UAF), and Kongsberg Maritime (KM) during sea acceptance trials (SAT) in August 2014.

Swath Coverage Analysis

Swath coverage performance can be evaluated by extracting the outermost port and starboard soundings to compute swath width from data acquired in a variety of water depths. Swath coverage testing data acquired specifically for this purpose should extend from deep water to shallow water with the ship traveling orthogonal to the slope. Alternately, data from an entire cruise can be used to assess effective swath width.

RV Hugh Sharp 2016 QAT Visit


The R/V Hugh R. Sharp is equipped with a Reson 7125 SVP2 (200/400 kHz) multibeam echosounder installed on a drop keel and an Applanix POS-MV 320 positioning and attitude system. Traditionally, survey planning and data acquisition are handled using Hypack HYSWEEP software installed on the RESON acquisition machine.

Tool: Sound Speed Profiling (SSP) Library and Manager

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