Information pertaining to submarine detection apparatus used by Allies known as "Sonar" in United States, and as " Asdic" in Great Britain; real secret of Asdic was in particular means which Navy had evolved of generating and directing supersonic beam, of receiving and timing echoes, its methods of operation and tactics used when engaged on submarine hunt; German counter measures; Asdic limitations.
Submarine detection
Shipbldg Shipg Rec
Shipbuilding and Shipping Record ; 67 , n 19
1946
2 pages
Aufsatz (Zeitschrift)
Englisch
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