1 x Twin 6pdr with no overhead cover. Unigue double split beam searchlight houses.
Graemsay Battery, Graemsay. Coast Artillery Battery: S0015229
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Norcon pillbox, with flat roof with hatch. Small circular Norcon type concrete pillbox built into the remains of a broch.
Anti-Torpedo Close Protection Pontoons (ATCPP), were experimental devices used for close protection of naval vessels, at anchor in Scapa Flow, from attack […]
