Enter a clue or pattern or both:
The Clue
Underwater acronym (5 letter answer)
The Answer
SONAR
Tags
Notes
The answer SONAR is seen frequently, appearing about once every 110 puzzles.
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Definition
SONAR as a noun:
1. (sonar, echo sounder, asdic) = a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee"