An instrument with an arc of 60 degrees and a sighting mechanism, used for measuring the angular distances between objects and especially for taking altitudes in navigation
The angular distance of a place north or south of earth’s equator, or of a celestial object north or south of the celestial equator, usually shown in degrees and minutes
The study of physical features of earth and its atmosphere and of human activity as it affects and is affected by the US including the distribution of populations and resources land-use and industries