noun Etymology: from ~s underwater echo ranging, probably from Anti-Submarine Division (British Admiralty department 1916-18) + -ics Date: 1939 sonar
ASDIC
Meaning of ASDIC in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012