Davis Instruments Celestial Navigation Quick Reference Card
Celestial Navigation: A Complete Home Study Course, Second Edition
Davis Instruments Artificial Horizon
2018 Nautical Almanac
The Sextant Handbook
Davis Instruments Mark 25 Deluxe Sextant Navigation Tool
The Star Finder Book: A Complete Guide to the Many Uses of the 2102-D Star Finder, 2nd Edition
Davis Instruments 26 Mark 15 Sextant Navigation Tools
Celestial Navigation for Yachtsmen
Marine Sextant, Davis