1° off course:
1° off course after 100 yards is 5.2 feet.
1° off course after one mile yards is 92.2 feet.
1° off course when traveling from San Francisco to Los Angeles is 6 miles.
1° off course when traveling from San Francisco to Washington D.C. is 42 miles.
1° off course when traveling from the Earth to the Moon is 4,169 miles.