Sextant — Davis Mark 15

A Practical, Proven Instrument for Learning & Traditional Celestial Navigation

The Davis Mark 15 Sextant is a well-regarded, mid-range navigation instrument designed to make celestial navigation approachable, accurate, and dependable. Favoured by sailing schools, offshore cruisers, and navigators building hands-on skills, it combines essential professional features with clear, user-friendly operation.

Manufactured by Davis Instruments, the Mark 15 is built for real-world use—robust enough for life at sea, yet intuitive enough for those learning the art of sextant navigation.

⚓ Designed for Confident Sight-Taking

The Mark 15 is engineered around a 7″ (18 cm) frame radius, offering excellent balance and stability while remaining comfortable to hold during extended sight sessions. The arc is clearly graduated from –5° to +120°, covering the full range required for solar, stellar, and planetary observations.

A traditional half-silvered horizon mirror delivers familiar, time-tested alignment between celestial bodies and the horizon—ideal for anyone learning classical methods.

🔭 Optics & Measurement Precision

• 3 × 27 mm star scope — well suited for stellar sights and low-light conditions

• Seven large sunshades — effective glare reduction for safe solar observations

• Micrometer drum with vernier scale — reads cleanly to 0.2 minutes of arc, enabling precise angle measurements

• Clear, high-contrast graduations — easy to read in varied lighting conditions

These features make the Mark 15 particularly forgiving for beginners, while still offering the accuracy needed for meaningful navigation fixes.

📘 Ready to Learn, Ready to Sail

Each Davis Mark 15 includes an instruction booklet, allowing new users to begin practising immediately. Its straightforward layout and traditional configuration make it an excellent teaching sextant and a reliable backup instrument aboard cruising vessels.

📐 Specifications

🎯 Ideal For

• 🧭 Students of celestial navigation

• ⛵ Sailing schools & training programmes

• 🌊 Offshore cruisers wanting a reliable backup

• 📚 Navigators practising traditional methods

Important: This item is supplied to order.
Please allow up to 10 working days for delivery.

The Davis Mark 15 Sextant offers a confident introduction to celestial navigation—clear, capable, and trusted by navigators worldwide.

A practical instrument for learning the sky, one sight at a time.