  Electronic Aids to Navigation (Paperback) ISBN-13: 9780713135480 ISBN-10: 0713135484 Genre: Science & Math ?  Electronic Aids to Navigation Position Fixing (Paperback) ISBN-13: 9780340543801 ISBN-10: 0340543809 ?  Understanding Gmdss the Global Maritime Distress and Safety System (Paperback) ISBN-13: 9780470237069 ISBN-10: 0470237066 Genres: Nonfiction, Science & Math ? |
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