Echo sounders
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Type 778 - A high quality, fully ruggedized, shock protected military echo sounder. NSN 5845-99-522-7491
Type 786 - Designed primarily for use on flat bottomed vessels or landing craft and employs an automatically retracting transducer. NSN 5845-99-722-5228
Type 787 - Used extensively throughout the world in naval and commercial applications involving coastal, auxiliary and patrol vessels. NSN 5845-99-724-6052
Type AB3801 Echo Simulator - A portable and versatile instrument used to test and calibrate echo sounders, sonara and similar devices. NSN 5845-99-985-1330