Orkneyinga Saga: Viking Ship & Scapa Flow
The bodies of water surrounding the Orkney Islands, such as the Scapa Flow, were just as important key locations as their land counterparts. Vital locations, such as seats of multiple earls, is right off the edge of the Scapa Flow. "...the Orkney Islands were divided into thirds between of three of Earl Sigurd's sons, and later into halves from time to time between two earls" (Steinnes). These bodies of water held many battles for the earls of Orkney and their invaders. One account is the battle between Earl Thorfinn and Karl Houndson, the Scot-King. The two had a final naval battle of the coast of Deerness. "This fight was both hard and long, and it was long before it could be seen which way the day would turn" (Hermann). This is just one example of the naval warfare that would have taken place during the Orkneyinga Saga. Without locations such as the Scapa Flow and war machines such as the viking longship, the Saga would be a completely different story, with a completely new set of rules. It's with these characteristics that make it so unique and the popular legend it is.
Sources:
Steinnes, Asgaut. “The 'Huseby' System in Orkney.” The Scottish Historical Review, vol. 38, no. 125, 1959, pp. 36–46
Hermann, Pálsson, and Paul Edwards. Orkneyinga Saga: The History of the Earls of Orkney. London: Hogarth Press, 1978.