EM122

2020 Kilo Moana EM122/EM710 QAT

Multibeam System: 
EM122
Multibeam System: 
EM710
CruiseID: 
KM2008B

KM 2020 QAT Planning Overview

  • The University of Hawaii’s UNOLS vessel R/V Kilo Moana(KM) is equipped with Kongsberg Maritime EM122 and EM710 multibeam echosounders and an ApplanixPOS MV-320 v5 Ocean Master positioning / attitude system
  • The Multibeam Advisory Committee (MAC) was asked to assist with Quality Assurance Testing (QAT) of the ship’s multibeam echosoundersahead of the 2020 field season; due to widespread travel restrictions, MAC personnel provided remote support for line planning and data analysis from shore

2020 Healy EM122 QAT Report

Multibeam System: 
EM122
CruiseID: 
HLY20TC
  • The USCGC Healy (HLY) is equipped with a Kongsberg Maritime EM122 multibeam echosounder (1° TX x 2° RX) with Seapath 330+ (primary) and Applanix POS MV (secondary) positioning / attitude systems
  • The Multibeam Advisory Committee (MAC) was asked to assist with Quality Assurance Testing (QAT) of the ship’s multibeam echosounders ahead of the 2020 field season; due to widespread travel restrictions, MAC personnel provided remote support for line planning and data analysis from shore

2019 Armstrong EM122 and EM710 Calibration

Multibeam System: 
EM122
Multibeam System: 
EM710
CruiseID: 
AR42

Executive Summary

  1. Calibrations (‘patch tests’) were planned for the EM122 and EM710 multibeam echosounders on R/V Neil Armstrong during AR42-02 following the winter 2019-20 maintenance period. Calibration sites were developed opportunistically along a transit route in the vicinity of the western Florida escarpment.
  2. The EM710 was most recently calibrated during AR41 in November 2019; due to elevated sea state, the scope of AR41 was narrowed and the EM122 calibration planned for that cruise was removed from the schedule.

Atlantis Seapath Test 2019

Multibeam System: 
EM122
CruiseID: 
AT42-10

Executive Summary:

  1. R/V Atlantis EM122 multibeam data includes intermittent depth artifacts across the swath that do not appear to be correlated with roll, pitch, sound speed, latency, or other sensor integration errors. These were first brought to the attention of the Multibeam Advisory Committee (MAC) in late 2016, beginning a process of investigation to better define the problem and rule out a variety of potential causes.

2017 Kilo Moana Quality Assessment Visit

Multibeam System: 
EM122
CruiseID: 
KM1711

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: 
EM122
CruiseID: 
HE17TA

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: 
EM122
CruiseID: 
SR1601

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

2016 Neil Armstrong Sea Acceptance Trails

Multibeam System: 
EM122
Multibeam System: 
EM710

The R/V Neil Armstrong is a new vessel operated by Woods Hole Oceanographic Institute (WHOI) equipped with Kongsberg Maritime (KM) EM122 (12 kHz) and EM710 (70-100 kHz) multibeam echosounders. The hardware installation, calibration, software configuration, and performance of these systems were evaluated during a sea acceptance trial involving WHOI, KM, Multibeam Advisory Committee (MAC), and NOAA Office of Coast Survey personnel.

Kilo Moana 2015 EM122 MBES Review

Multibeam System: 
EM122
CruiseID: 
KM1514

Introduction

Kilo Moana 2015 Acoustic Test Report

Multibeam System: 
EM122

Executive Summary

Conclusions

  • The EM 122 receive array had a bad preamplifier board that was causing the entire array to have higher noise levels and to exhibit non-uniform distribution of noise characteristics.2.The EM 122 receive array module 6 was out of phase with the rest of the sonar receive array.
  • The EM 122 receive array module 6 was out of phase with the rest of the sonar receive array.
  • Propeller cavitation performance was good and consistent with previous results.

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