Davis Mark 25 Deluxe Marine Sextant • 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.
Viewing Field Illuminator Weight
DELUXE Beam Converger LED* on both arc 16.5 oz.
MARK 25 1.61 x 1.16" and drum, uses (0.47 kg)
#025 (43 x 29 mm) two 1.5 V (AAA)
batteries
*Average LED half-life is approximately 10 years if operated continuously.
All Davis Master Sextants feature the following professional specifications:
• 7" (18 cm) frame radius. Graduation 120° to −5°
• Index mirror rectangular, 1.98" × 1.49" (50 × 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 × 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.
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