abbreviation for Anti-Submarine Detection InvestigationCommittee, a committee which British sonar was named after.(British) an underwater apparatus used to detect submerged submarines. Its name comes from the group that suggested it the Allied Submarine Detection InvestigationCommittee, a jointEnglish-Frenchprojectset up in 1918, immediately after WorldWar I (1914@1918). Now called sonar. A QCB-1 antisubmarine electronic echo device, an ASDIC QCB-1Tthis is the way it is built. - StudyEvaluation of Information (11 Aug. 64)the name of a system developed by the British and first used in 1921 that transmits a pulse of sound into the ocean and uses its rebounding echo to detect submarines. "ASDIC" comes from the initials of the group that firstabbreviation for Anti-Submarine Detection InvestigationCommittee, a committee which British sonar was named after. I tried to explain it to themT"a QCB-1 antisubmarine electronic echo device, an ASDIC QCB-1. This is the way it is built." - StudyEvaluation of Information (11 Aug. 64)