asdic is an acronym for antisubmarine detection investigation committee.    From Wordnet, Princeton University. 

Establishment (ASEE), where he was involved with the development of asdic, an early form of sonar, and then for the Admiralty Signals Establishment (ASE).    From Wordnik.com.  [The Guardian World News] Reference

I mean I'm also thinking of Japanese and I guess, Idaho and so on from a manual differentiation there, but in so called normal times, if they exist, is there a flow of chassis for asdic or is it fairly steady?.    From Wordnik.com.  [pfblogs.org: The Ad-Free Personal Finance Blogs Aggregator] Reference