Enter a clue or pattern or both:
The Clue
Submarine detection systems (6 letter answer)
The Answer
SONARS
Tags
Notes
The answer SONARS is rarely seen, appearing only about once every 1600 puzzles.
Related Clues
Devices on destroyers
Finding things?
Sub detectors
Sub systems
Undersea trackers
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"