An Admiral Commanding for the Orkneys and Shetlands was appointed twice, on the outbreak of war, to provide for the defence and administration of the main base for the Home Fleet.

The Admiral Commanding was responsible, under the orders of the Commander-in-Chief, Home Fleet, for administration of naval defences, naval establishments, and shore duties generally in Orkney and Shetland.

[4] During the Second World War the Rear-Admiral, Scapa Flow continued to serve under him.

Included:[5] Source:[5] This officer's role was similar to that of Admiral Superintendent of a dockyard port.

The Admiral's flag was flown aboard HMS Iron Duke in Scapa Flow.