Davis Quick Reference Celestial Navigation Card [132] Brand_Safe-T-Alert Multi-layer filter provides a spectral

Multi-layer filter provides a spectral response that closely matches the Erythema Action Spectrum

For BRP® - Evinrude® (OMC®) engines manufactured from 1979 to date

UPC: 014717583596

UPC: 723193824962

Inside Diameter: 35mm - 1

Davis Quick Reference Celestial Navigation Card [132] Brand_Safe-T-Alert Multi-layer filter provides a spectralQuick Reference Celestial Navigation Card A simplified, yet complete Celestial Navigation system. Includes everything you need: sextant use and corrections, star finder for 18 stars, data entry form, and step by step sight reduction and plotting procedures. May be scored and separated; a large portion fits in the sextant case for quick reference, and a small part acts as a waterproof data reduction card.