O'Donnell, Nuala An analysis into the verification of position fixing when using ECDIS / Nuala O'Donnell. - viii, 35 pages : color illustrations, tables ; 30 cm - B.Sc. (Hons) Nautical Science . Includes bibliographical references. Subjects--Topical Terms: Electronics in navigation Dewey Class. No.: B.Sc. Nautical Science