Combination of assets: HUMINT, signals intelligence, radar (detecting the boats when snorting) and active/passive sonar. See October Fury by Peter Hutchausen(2002 ISBN 0-471-41534-0). Some people enjoy dissing Mr. Hutchausen who is a journalist rather than a historian but in this case he was an active participant in the events being a sailor on USS Blandy (DD-943), part of the USS Essex (CVS-9) ASW battle group throughout the crisis.
Edit: Missed TLAM Strike's endorsement of October Fury. Apologies for the repeat.
Last edited by Randomizer; 09-06-09 at 08:19 PM.
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