Dead Reckoning Altitude and Azimuth Table (H.O. No. 211)

Washington, D.C: United States Government Printing Office, 1943. Third Edition. Hard Cover. Near Fine/No Jacket. 9x5x0. Third edition. Pencil name and ink stamp. 1943 Hard Cover. 49, [8] pp. Tabbed degrees. Altitude: the angular distance of a celestial body above or below the horizon, measured along the great circle passing through the body and the zenith. Altitude is 90° minus the zenith distance. Azimuth: the angular distance measured eastward along the horizon from a specified reference point (usually north). Azimuth is measured to the point where the great circle determining the altitude of an object meets the horizon.