1) Antisubmarine device 2) British sonar 3) Early sonar, to Brits 4) Echo sounder 5) Echo sounder acronym 6) Measuring device 7) Measuring instrument 8) Measuring system 9) Navigational instrument 10) Sonar 11) Sonar device 12) Sonar in soho 13) Sonar, British style 14) Sonar, to Brits 1) Sonar 
A type of sonar used by the Allies for detecting submarines during the Second World War.
A type of sonar used by the Allies for detecting submarines during the Second World War.
ASDIC was an abbreviation used during the Second World War for Allied Submarine Detection Investigation Committee. It was a device used for detecting underwater ships. The American name was sonar.