A critical survey of the vocabulary of Viking ships and their crews, of fleets and sailing and battles at sea, based on the runic and skaldic evidence from c.950-1100, and studied within the context of Viking activity in the period. The Vikings were the master mariners and ship-builders of the middle ages: their success depended on these skills. Spectacular archaeological finds of whole or partial ships, from burial mounds or dredged from harbours,...