Before revision: Methods include using a compass (magnetic compass or gyrocompass), the Sun path (unaided or by using a watch or sundial), the stars, and satellite navigation.U.S.
After revision: The most direct method isbut indirect methods exist, based on using a compass (magnetic compass or gyrocompass), the Sun path (unaided or by using a watch or sundial), the stars, and satellite navigation.U.S.