https://www.carolinasurveyingequipment.com/product-page/echologger-ect-d052s-echosounder-1
EchoLogger ECT D052S EchoSounder | Carolina Surveying
echologgerectechosoundercarolinasurveying
https://manuals-skyhub.sphengineering.com/text/skyhub/echosounder/echosounder-sbes.html
6. SBES: EchoLogger - SkyHub User Manual
sbesechologgerusermanual