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No navigator should be without a good set of parallel rules as part of the navigation back up plan in the event of an electronic navigation failure
Edition Date: 22-Mar-1985
(1-Feb-2005)
Edition Date: 20-Aug-1999
Deck Officer Study Guide Volume 6: Deck Illustration Booklet 2025 Publication No navigator should be withoutby Captain Joseph S. Murphy, II (Editor) Commonly known as just "The Murphy Books" or "Murphy Guides", the Deck Officer Study Guides contain actual United States Coast Guard license exam questions and answers released by the National Maritime Center. The Murphy Books are updated on the release of questions by the NMC, usually once or twice a year. Captain Murphy, or "Joe", is looked upon as a national expert on license exams and USCG questions by
