O T P Roberts No description specified. 1-5 (5 Records) Documents The building and trials of the Årby Boat Replica (1993) A comparison of Sail Control Methods in Second Century Egypt and in Viking Gotland [Krampmacken] (1987) The Årby Boat Replica (1986) The sailing rig of Olympias (1993) Viking sailing performance [Krampmacken] (1984)