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There is even a book on how to use them called "How to Use Plastic Sextants" by David Burch who seems to be a fairly prolific author on celestial navigation htt
by gcheong 8y ago
There is even a book on how to use them called "How to Use Plastic Sextants" by David Burch who seems to be a fairly prolific author on celestial navigation http://a.co/0iVNVrW http://a.co/0iVNVrW
- keithpeter 8y agoLinked to that book page on Amazon is the Davies 'quick reference card' (laminated) that I imagine one would have in the life boat...