Loomis' map of magnetic variation in the United States. He made his observations as directed hy Prof. Gillespie's work on surveying, and found the magnetic variation to be 3 30. This is the same ...

Question: Why do people say, "Winds aloft are true," when what is forecast is often notoriously inaccurate from what you really experience at altitude? I am a student pilot and this has messed me up ...