The Astra IIIB Sextant incorporates all of the features of high-end German and Japanese sextants, at about one third of their cost. But make no mistake: it is a very accurate instrument of very high quality. How does Astra do it? First of all, it's made in China, where labor rates are vastly lower than in Germany or Japan. Second, they use an aluminum alloy for the frame (as does Freiberger and C. Plath in its lightweight sextants). As a result, there is a very minor sacrifice in potential accuracy (+ or - 20 seconds throughout the arc, compared with 9 seconds for the Cassens & Plath), which is likely to be completely inconsequential when taking sights from a moving small yacht. The Astra IIIB is, in fact, used by many professional navigators.
We can recommend the Astra IIIB Deluxe to all navigators - and especially to those beginning to learn celestial - without reservation. It's a bargain. Astra IIIB Deluxe Sextant Whole / Full Horizon Mirror
Astra IIIB Deluxe Sextant Split (Traditional) Horizon Mirror
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