Scapa Flow (p. 170)

This is a body of water in the Orkney Islands that has played an important role in travel, trade, and conflict throughout time. The Vikings anchored their longships there more than 1000 years ago. It served an important British naval base in both world wars. In World War I, the Germans scuttled their fleet there and as a result, its wrecks and marine habitats have formed an acclaimed diving location. The world’s first ship-to-ship transfer of liquefied natural gas took place at Scapa Flow in 2007. (en.m.wikipedia.org).