Davis Mark 15 Sextant — Reliable Celestial Navigation for Serious Sailors

Navigate with confidence using the Davis Mark 15 Sextant, a trusted, high-precision instrument designed for accurate celestial fixes at sea and on land. Built for demanding conditions, it combines a robust frame, crisp optics and smooth micrometer control to deliver consistent, repeatable sights. Ideal as a primary learning tool or a dependable backup to modern electronics, the Davis Mark 15 brings together traditional craftsmanship and smart engineering so you can plot your position with clarity, control and confidence.

Key Benefits and Applications

• Accurate celestial fixes — Obtain dependable Sun, Moon, planet and star sights to confirm your position and add redundancy to your navigation plan.
• Confidence when electronics fail — A robust, passive instrument that keeps you navigating during power loss, system errors or antenna damage.
• Fast learning curve — Intuitive controls and clear markings help students and self‑learners master sight-taking and reduction more quickly.
• Consistent performance offshore — Stable handling and high-contrast optics make it easier to take reliable readings in real sea states and varying light.
• Durable for harsh environments — Corrosion-resistant materials and UV‑stabilised components stand up to salt, sun and spray season after season.
• Portable and practical — Lightweight construction reduces fatigue during extended observations while remaining sturdy and well balanced.
• Versatile use cases — Perfect for ocean cruising, coastal training, adventure expeditions and as an essential part of any emergency navigation kit.

Featured technical specifications

• Wide angular measurement range — Measures altitude angles across a broad arc suitable for Sun and star sights, supporting practical navigation scenarios up to approximately 120°.
• Fine micrometer control — Smooth tangent screw and micrometer drum allow precise, minute-level adjustments for repeatable sights and refined intercepts.
• Minute-level resolution — Vernier and drum markings enable readings to 1 arc‑minute for accurate plotting on charts.
• Traditional split horizon mirror — Half‑silvered horizon mirror paired with a bright index mirror delivers a clear, high‑contrast overlap of celestial body and sea horizon.
• Multiple sun shades — Integrated shades on both index and horizon paths provide graduated light control for safe, comfortable observations from dawn to noon.
• High-visibility scale — Crisp, high‑contrast arc and drum graduations are easy to read in changing light, supporting quicker sight timing.
• Robust, marine-ready build — Impact‑resistant, UV‑stabilised polymer frame and corrosion‑resistant metal fittings designed for long service in saltwater environments.
• Ergonomic handling — Balanced frame and contoured grip enhance stability during rolling seas, reducing hand shake and improving sight quality.
• User-adjustable alignment — Accessible index and side error adjustments help maintain accuracy and simplify routine calibration.
• Optics designed for clarity — Bright sighting system supports clean, sharp images of celestial bodies and horizon for confident alignment.

Why the Davis Mark 15 is the perfect choice for your navigation

Choose the Davis Mark 15 at Stratosens.com to equip your vessel with a reliable, precision‑focused sextant backed by expert support. Our curated selection, knowledgeable guidance and commitment to professional instrumentation ensure you receive the right tool and the right advice. From first practice sights to ocean passages, the Davis Mark 15 delivers the accuracy, durability and ease of use that discerning navigators expect—only at Stratosens.com.