On May 20, 1927, Charles Lindbergh solo’d his way from New York to Paris, as many of you know. What you might not have known, is that by the time he reached the Irish coast, over a day later, and having already been awake for over 45 hours straight (he didn’t sleep the night before), he was only 3 miles off his planned course. Now that’s dead reckoning. He only had a compass, a gallon of water, and five sandwiches. We GPS folks have it easy.
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