Crossword clue: depth finder for determining depth of water or a submerged object by means of ultrasound waves
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
fathometer
10 letters
wn-def
depth finder for determining depth of water or a submerged object by means of ultrasound waves