Astra IIIB Sextants
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High-quality, precision marine navigation instruments with superior optics are trusted by both novice and professional mariners alike. The Astra IIIB is crafted from lightweight, corrosion-resistant aluminum, ensuring durability and long-lasting performance in harsh marine environments. Featuring bright, energy-efficient LED lighting on the arc and drum, this instrument offers clear visibility during nighttime or low-light navigation. Standard rectangular index mirrors are easily interchangeable, allowing users to choose between the traditional half-silvered mirror preferred by experienced sailors for precise sightings, or the whole-horizon mirror, which many beginners find easier to use for accurate bearings.
Included with the Astra IIIB is a 3.5 x 40 monocular telescope that enhances distant viewing, helping mariners identify landmarks and navigational aids with greater clarity. Designed to deliver reliable, accurate readings, this versatile instrument combines expert craftsmanship with user-friendly features to meet the needs of all skill levels. Whether you are charting a course along coastal waters or navigating open seas, the Astra IIIB provides dependable performance essential for safe and effective navigation at sea.
Key Features:
- Frame Material: Aluminum
- Sighting System: Traditional half-silvered or whole horizon mirror
- Scope Magnification: 3.5 x 40
- Filter Shields: 4 index - 3 horizon
- Arc Range: ±20", throughout the arc
- Drum Calibration: -5° = 130°, radius 153mm
- Lighting: LED on the arc and drum
- Weight: 2.6lbs
- Case: Varnished wood carrying case
- Included Accessories: Case, instruction book, certificate of accuracy, vial of oil, adjusting wrench
- Warranty: 30 Days
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