07-02-07, 06:14 PM
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#5
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Sea Lord 
Join Date: Feb 2004
Location: San Francisco, California
Posts: 1,633
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U.Kdt.Hdb B. I. 28) This possibility of using the hydrophone to help in detecting surface ships should, however, be restricted to those cases where the submarine is unavoidably compelled to stay below the surface.
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