Sextant Astra IIIB - Traditional Splitview

Master the art of celestial navigation with unmatched precision and reliability
Discover a sextant that has set the standard for celestial navigation, trusted by sailors, navigators, and maritime professionals worldwide. With over 24,000 units sold in the U.S. alone, this instrument combines time-tested craftsmanship with modern engineering to deliver unparalleled accuracy and ease of use. Whether you're a seasoned navigator or just starting your journey into celestial navigation, this sextant is designed to meet the demands of the open sea while remaining accessible to all skill levels.

A legacy of precision and durability
Built to withstand the harshest marine environments, this sextant features a corrosion-resistant aluminum alloy frame and a bronze arc, ensuring long-lasting performance without compromising on weight. Its lightweight design—just 1.2 kg—makes it easy to handle, while its perfect balance guarantees steady readings even in rough conditions. The precision-engineered components, including a micrometer drum with a 1' scale and 0.1' vernier, allow for fine adjustments and readings with an accuracy of ±20" across the entire arc.

Optics and design optimized for clarity and versatility
The sextant’s optical system is a standout feature, offering exceptional clarity and brightness. The rectangular index mirror (56 x 42 mm) and interchangeable horizon mirror (51 mm diameter) provide flexibility for different navigation scenarios. Choose between a traditional split-view mirror for classic celestial navigation or a full-view mirror for enhanced visibility. The standard 3.5x40 monocular telescope ensures sharp, distortion-free images, while optional accessories like a 7x35 telescope or rubber eyepiece can further tailor the instrument to your needs.

Innovative features for modern navigators
Designed with the modern sailor in mind, this sextant includes an LED illumination system for the arc and micrometer drum, powered by two AA batteries. This feature ensures readability in low-light conditions, making it ideal for nighttime navigation. The sextant also comes with a set of index and horizon shades (4 index and 3 horizon) to reduce glare and improve visibility in bright sunlight. For training purposes, an optional bubble horizon accessory is available, allowing you to practice celestial navigation even when the natural horizon is obscured.

Ready for the sea, right out of the box
Every sextant is delivered in a polished hardwood case, combining elegance with protection. Inside, you’ll find everything you need to get started: a certificate of accuracy, adjustment tools, and clear instructions for setup and use. The included oil ensures smooth operation of moving parts, while the sturdy case keeps your sextant safe during storage and transport. With its user-friendly design, precise markings, and robust construction, this sextant is more than just a tool—it’s a companion for your maritime adventures.

This sextant is engineered for precision and durability, featuring a lightweight aluminum alloy frame and a bronze arc that spans from -5° to +130° with a 153 mm radius. It delivers an accuracy of ±20" across the entire arc, thanks to its micrometer drum with a 1' scale and 0.1' vernier for fine adjustments. The optical system includes a 56 x 42 mm rectangular index mirror and a 51 mm interchangeable horizon mirror (split or full view). Weighing just 2 lb., 10 oz., it is equipped with a 3.5x40 monocular telescope and LED illumination for the arc and drum, powered by two AA batteries. The sextant comes in a polished hardwood case measuring 6.5 x 13 x 11 inches, complete with adjustment tools, oil, and instructions.

• Experience the perfect blend of tradition and innovation with a sextant that offers unmatched precision, durability, and versatility. Its lightweight yet robust construction ensures reliable performance in any marine environment, while the high-quality optics and interchangeable mirrors provide exceptional clarity and adaptability. The LED illumination system enhances usability in low-light conditions, and the included accessories make it ready for immediate use. Whether you're navigating by the stars or training for your next voyage, this sextant is designed to exceed expectations, combining ease of use with professional-grade accuracy.