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GPS Backup with a Mark 3 Sextant

All Instructions and Tables Included; For Any Ocean, on Any Date; No Background in Celestial Navigation Required.

No power, and batteries used up? This book and a Mark 3 sextant lets you carry on. It's a short book, mostly tables.

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GPS Backup with a Mark 3 Sextant: All Instructions and Tables Included; For Any Ocean, on Any Date; No Background in Celestial Navigation Required.

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GPS Backup with a Mark 3 Sextant: All Instructions and Tables Included; For Any Ocean, on Any Date; No Background in Celestial Navigation Required.

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Length: 98 pages

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