Asdic definitions and example sentences on Wordnik

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Definitions (1)

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

And as a destroyer made her run, there was a short space ahead of her which was dead for her asdic; thus contact was lost during this last crucial moment. — Grey Wolf, Grey Sea
Furthermore, and most important, asdic was useful only for detecting a submerged boat. — Grey Wolf, Grey Sea
The escorts 'pinged' away with asdic, but, at schnorkel depth, the electro-boats were almost impossible to detect. — Luftwaffe Victorious
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? — pfblogs.org: The Ad-Free Personal Finance Blogs Aggregator
He trained his commanders to stay on the surface, safe from the escorts’ asdic, and wait for their chance to slip by them into the main body of the convoy. — Grey Wolf, Grey Sea