"The museum is housed in the oil-pumping station of the former naval base at Lyness. The base was originally built to supply fuel to the British Fleet, which was based in Scapa Flow.

Outside the museum are some of the guns salvaged from the scuttled World War I German Fleet; the propeller from HMS Hampshire, which was sunk during the same war; and remains of some of the boom defence nets, designed to prevent enemy ships entering Scapa Flow."