What notable results did hydrophones or ASDIC aboard cruisers, carriers, and battleships achieve?
Short answerPrinz Eugen's detection is the question's example. The response adds a tentative King George V claim and several submarine rammings, while stressing uncertainty about confirmed sinkings.
NotesThe question supplies Prinz Eugen's Denmark Strait detection as an example of a large warship using hydrophones. King George V is then suggested as having detected and sunk a submarine, but the identification is uncertain. The discussion broadens to submarine rammings by battleships across both world wars. A tentative recollection gives six or seven rammings but only about two confirmed kills, so a collision should not automatically be counted as a sinking. The separate collision with Punjabi is explained through storm conditions and zigzagging, rather than treated as evidence for a submarine kill.