Below are possible answers for the crossword clue Sub standard?.
5 letter answer(s) to sub standard?
SONAR
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"
Other crossword clues with similar answers to 'Sub standard?'