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The Cult of Gago
Early Types of Marine Sextants and Their
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aboard Aerea Aerial Navigation air navigation aircraft airplane Alcock and Brown altitude American angle April Argos Arthur Whitten Brown artificial horizon astrolabe astronomical navigation aviation azimuth Beires Brazil Brazilian British bubble sextant Byrd sextant Cabral and Coutinho Captain Castilho celestial body chart chronometer compass course crossing designed edition Fernando de Noronha Figure flew fliers flight flying Gago Coutinho Gago Coutinho 1969 Greenwich Henry Hughes horizon glass included instrument island June land latitude Lisbon logarithms longitude LOP's marine sextant meridian miles Museum natural horizon Nautical Almanac Naval nonstop observations obtained octant officer Paul Rocks Penedo periscopic sextant pilot Pinheiro Correa plane Plath Portugal Portuguese Navy position Praia precision astrolabe precomputation published radio Recife Sacadura Cabral sea horizon ship sight reduction South Atlantic spirit level stars sun sights tables telescope tinho took transoceanic U. S. Navy Willson York