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British naval grid codes
Hello
I am researching on the naval battle in the Kattegat and Skagerrak during operation "Weserübung" during April-May 1940.
However, I have problems with the position codes of the British submarines. They consist of a four letter and four number code: for example: MBRR 5527 (HMS Narwhal 12.4.40) og MBCU 5514 (HMS Truant 9.4.40).
It seems that the grid codes were also used by the Coastal Command.
I understand, that the four numbers nominates minutes N and E, and the letters degrees N and E. But I have no means of placing the letter codes on a map.
I would be very thankful, if anybody could help me to get a map of the Scandinavian area - or at least can tell me the exact position of the letter codes.
Best regards
Jens
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