NASA astronaut Alexander Gerst learns how to use a sextant. “I learned how to navigate after the stars using a sextant,” said Gerst. “It’s actually a test for a backup nav method for #Orion & future ...
Chronicles the author's first transatlantic voyage, when he learned to navigate using a sextant, and traces how this indispensible navigational tool was used by daring mariners to explore and map the ...
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