Davis Instruments Mark 25 Working Nautical Sextant Navigation Tool

Davis Instruments Mark 25 Working Nautical Sextant Navigation Tool

• Full-field dielectric Beam Converger with quartz hardcoat replaces conventional half-silvered mirror. Horizon and astrobody images are combined in a single full-field for easy, reliable sights under the most difficult conditions.
• Special mineral coating is selective for different wavelengths of light. Horizon is transmitted in one color region and the star or sun in another.
• Reinforced plastic stiffens frame for greater measurement accuracy
• High-efficiency LED (solid-state Light Emitting Diode) illumination system, which floods arc and drum with soft light. The LED will last for the lifetime of the sextant.* Batteries, which are included, will last up to 10 times longer than with regular bulbs. Positive “push-on” switching action, with vinyl boot water protection
• Seven large sunshades allow complete, independent adjustment of shading density for horizon and index mirrors
• Fully ribbed, three-circle sextant body for platform strength and stability.
• Large, contoured handle designed for sure, steady grip and angled back for added control
• 3 × 27 mm star telescope with antireflective coated glass lenses, plus separate hooded sight tube for glare-free sun shots
• Neck lanyard frees hand and protects sextant
• Tough, fully padded, shockresisting carrying case with compartments for extra batteries and mirror kits.