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Force 4

Astra 3B Deluxe Metal Sextant - Split View

Force 4 Astra 3B Deluxe Metal Sextant - Split View

Availability: In stock

Save £25.05 RRP £650.00

£624.95

Product code: 320002
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The Astra IIIB Deluxe Sextant is probably the most recognized and easiest to use sextant worldwide.
Its excellent optics, and quality mirrors makes it the perfect selection for both beginners and professional navigators.
The frame is made from lightweight aluminium alloy which resists corrosion and reduces arm fatigue and unsteadiness among infrequent users. Its light weight and excellent balance makes it a pleasure to hold and makes sights easier to take under dynamic weather and sea conditions.
Even reading the sextant under low light conditions is made easier by having white degree marks against a black background as opposed to scribe marks on a brass arc. Additionally, the sextant has LED lighting of the arc and drum powered by two standard size AA batteries (not included) which install in the handle.
During manufacture, each mirror and shade glass is tested for perfect flatness by the Fresnel diffraction pattern method. The index mirror is rectangular in shape which allows more aspect of the mirror to be available for high angle sights. This means the sextant does not have to be held as steady for them.
The Astra IIIB comes in a varnished wooden case, with instruction book, certificate of accuracy, and adjusting wrench. It includes a Split View mirror and a 3.5×40 monocular telescope which collect ample light for star sights.
Specification:
• Arc: -5° + 130°, radius 153mm
• Accuracy: ± 20?, throughout the arc
• Micrometer Drum: 1' scale, vernier to 0.1'
• Horizon Mirror: 51mm diameter
• Index Mirrors: 56x42mm
• Shades: 4 index – 3 horizon
• Weight: 1.2kg
• Case Dimensions: 16.5 x 33 x 28cm

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