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In the age of adventure, when dirigibles coasted through the air and vast swaths of the Earth remained untouched and unseen by man, one pack of relentless explo
"Navigation puzzles, controversies, historical problems, and other ponderables demystified by an expert navigator and writer. Joe Portney is a US Naval Academy
*Explains the mathematics essential to flight, teaching basic principles and reasoning *Provides an understanding that allows pilots to utilize new technologies