avigation

The “highs” and “lows” familiar to the meteorologists—the areas of high and low barometric pressure—are forever playing tag with each other, the air from one area flowing in upon the other much as water seeks its own level, creating fair weather and foul, and offering interesting problems to the students of avigation, not to mention variegated experiences to the flyer himself.

1928, Amelia Earhart, 20 hrs. 40 mins. Our Flight in the Friendship, page 227

The purpose of this book is to give the pilot a clear understanding of avigation by dead reckoning, the system used by Colonel Lindbergh in his memorable flight.

1929, Ienar Ewald Elm, Avigation by Dead Reckoning, page 10

There are four more or less distinct methods of avigating, all of which are somewhat interrelated. These comprise: Piloting, Radio Avigation, Dead Reckoning, and Celestial Avigation.

1940, Hilton Frank Lusk, General Aeronautics, page 361