Astra Iiib Sextants - Trad Mirror . High-quality accurate instruments with excellent optics are popular with both beginning and professional navigators. Constructed from lightweight corrosion-resistant aluminum the Astra IIIB is electrically lighted by LED on the arc and drum. Rectangular index mirrors are standard on both models though mirrors on the Astra are easily and conveniently interchangeable. The traditional half-silvered mirror is preferred by many experienced mariners while the whole horizon mirror is often easier for beginners to use. A 3.5 x 40 monocular telescope is also included. 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
