Luftwaffe Planquadrate map system - 8

[Richard T Eger]

From 12 O'Clock High!:

Pierre BABIN
ref.map PQ 5951/14
Sat Sep 4, 2024 10:13
81.250.106.170

Hello,

Could somebody tell me where the ref.map PQ 5951/14 is located (longitude and latitude) ? I think it's off Brest, in the Atlantic Ocean ... but I'm not sure.

From an other source the same geographic spot would be located Q 51521 (probably an other reference map system)

Please help me to see this thing clearly ...

Many thanks in advance

Pierre