I have run into an issue with Japanese escort ships. Twice I have been detected while waiting in firing position between 1000-2000 yds perpendicular to the convoy track. Sea state was calm, so no broaching. No periscopes up. Rigged for silent running and all stop. How are they detecting me? They arent echo-ranging, so I guess it has to be either passive sonar or visual sighting but I can't fathom how. Can any of you guys shed some light on this problem?
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