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S 449, Stp Roland I

S 449, Stp Roland I

Closed, but a peep inside is possible.

S 449, Stp Roland I

360 degrees is pure north..

S 449, Stp Roland I

180 is south. Aiming directions in degrees means a naval battery, in this case M.K.B Zanker on the island of Sylt (Ge), armed with 15 cm guns.