Re: Luftwaffe air recon flights in very late May – early June 1944 to southern Karelia Isthmus/Lenigrad area
The codes are the numbers of the grid squares used in the war-time air surveillance map of Finland. Size of a square was one degree in longitude and half a degree in latitude. 143 was between 28 and 29 E, 60 and 60.30 N. 144 was the next square east of it and 142 next square west of it etc. 118 was east of Tallinn on the south coast of Gulf of Finland. I am sure that if you pay a visit to the Air Force museum you will see the original map.
Matti
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