DELUXE MARK 25 MASTER SEXTANT
with full-field dielectric Beam Convergerª
Foam-lined carrying case included
- Full-field 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.
- Improved 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. This is another Davis first! Positive "push-on" switching action, with vinyl boot water protection.
*Based on manufacturer's data, average LED "half-life" is approximately10 years if operated continuously.
All Davis Master Sextants feature the following professional specifications:
- Molded of tough, high-impact plastic.
- 7" (178 mm) frame radius. Graduation 120° to -5°
- Index mirror rectangular, 1.98" x 1.49" (50 x 38 mm).
- Precision machined slow travel gear and worm mechanism.
- Highly visible, easy-to-read micrometer drum and vernier allowing readings to 2/10 minute of arc.
- 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.
- Seven large sunshades allow complete, independent adjustment of shading density for horizon and index mirrors.
- 3 x 27 mm star telescope with anti-reflective coated glass lenses, plus separate hooded sight tube for glare-free sun shots.
- Neck lanyard frees hand and protects sextant.
- Tough, fully padded, shock-resisting carrying case with compartments for extra batteries and mirror kits.
Mariner endorsement: "As an experienced open-ocean navigator, I have relied upon my Davis Mark 25 Beam Converger Sextant for over eight years. It has proven to be of the highest quality, both in construction and performance, of any sextant that I have handled. In numerous crossings of the Pacific Ocean, in fair weather and foul and in vessels from 38 to 620 feet, this lightweight plastic sextant has held up where more traditional metal sextants have failed. Calibration is simple, and the full-field view makes it a joy to operate compared to split-screen models. It has my highest recommendation. I simply have nothing bad to say about Davis or their products.
- David P. Wood, Arlington, VA, April 1993