History of Orkney should continue to be observed in Orkney and Shetland. Thus the udal succession and mode of land tenure (that is, absolute freehold as distinguished from feudal tenure) lingered to some extent, and the remaining udallers held their lands and passed them on without written title. The islands cluster round the huge deep-water anchorage of Scapa Flow like a protecting hand, and in both World War I and World War II, the Royal Navy had a major base there, enabling them to challenge any attempt by German warships to emerge into the ocean through the Norwegian Sea. After the Armistice in
Master of the fleet rank of captain, while masters who had served at least 15 years were given the new rank of "staff commander" and ranked after commander. During the First World War the title was revived for the Grand Fleet's senior Navigation Officer. The title has been used outside the Royal Navy, such as in "Ultramarines" and other science fiction, and for the captain of the "Belle of Louisville". Master of the fleet In the Royal Navy, the rank of master of the fleet denoted the sailing master of a fleet flagship, or the senior sailing master in a fleet. Examples include John