The periscope reticle has markings in degrees that show where the various components are located. So you can see that the bow, middle, and stern compartments are located at 3 degrees left, dead ahead, and 3 degrees right. Then you use the offset feature in the TDC to aim the torpedoes at those locations on the ship.
I don't believe the "Dick O'Kane" method posted on the Subsim forums is historically accurate. Dick O'Kane, trained as a wartime US submarine skipper, would have used all of the features of the TDC and position keeper as originally designed, instead of the shortcut method posted here.
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Last edited by cleverusername; 11-25-08 at 07:46 PM.
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