Scapa Flow: The defences of Britain's great fleet anchorage 1914-45

A strategically important natural harbor in the Orkney Islands, Scapa Flow served as Britain's main fleet anchorage during World Wars I and II. It held Jellicoe's Grand Fleet from 1914-18, and it was from here that it sailed out to do battle with the Germans at Jutland in 1916. In 1914 the British began building a comprehensive defensive network by fortifying the entrances to Scapa Flow and then extending these defenses to cover most of Orkney. These static defenses were augmented with boom...