Crossword Genius

Submarine detector (5)

Ross

I believe the answer is:

sonar

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">submarine detector</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for sonar that I've seen before include "Sub's navigation" , "Underwater detection system" , "Method of echolocation" , "echo device" , "Underwater detector" .)

I've seen this clue in the Newsday and the Universal.
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