Astra III Professional Sextant with Full Mirror
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Astra Professional Sextant with Full Mirror
Just as the Astra IIIB has become world famous as the premier low-cost metal sextant, the Astra III Professional Model, with its low cost, high accuracy, and excellent handling qualities, is destined to be the standard for professional seamen. Its construction is similar to that of the Tamaya sextants, in that it has a bronze arc fused to an aluminum frame. The bronze arc can be manufactured to a higher tolerance than aluminum. The handle features a new, more comfortable design and an electrical outlet for powering accessories. Except for the weight difference, accuracy, and handle improvements, it is exactly the same sextant as the basic Astra IIIB and has all its attributes. These include thoroughly tested mirrors, maintainability, and the ability to quickly and economically change the horizon mirror type. which gives the sextant higher accuracy. At the same time, the aluminum frame keeps the overall weight low enough that fatigue is not a problem, as with a solid bronze or brass sextant. Nevertheless, the additional weight of the bronze arc adds about 8 oz. and gives the instrument an excellent balance and ‘heft’. Included and Optional Equipment: The sextant has LED lighting for the arc and drum, powered by two standard-size AA batteries (not included), installed in the handle. It comes in a varnished wooden case, with an instruction book, a certificate of accuracy, and an adjusting wrench. Case external dimensions are 6.5 x 13 x 11 inches. It includes a 3.5×40 monocular telescope as standard equipment.
Key Features
- Come with Full View Horizon Mirror
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