Quote:
Originally Posted by Silent Steel
Hi again
Well, in some radio messages I get on patrol sent to/from BdU to/from other uboats they are sometimes talking about observations or new patrol areas in a specific 'grid' with a specific name or number but the only 'grids' I can see on my map are the longs and lats... 
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I think that's what you are looking for:
Kriegsmarine Grid Map