Quote:
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Originally Posted by QRQ 30
Porpoise occasionally. See where you are heading and adjust the compass heading accordingly.  Example: if you see you are headed 100 M to the right of the target, adjust the compass to 100 M to the left. A porpoise is a very brief surfacing to see where you are heading. Subs have periscopes. 
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Let's assume this is either not possible or not desired for some reason.