Memo for the Record, 1 November 1968a, Subj: Telephone conversation of 31 Oct 68, Col Werlich – Lt Marano, 1. An azimuth is the horizontal component of a direction measured around the horizon clockwise, from the north (0°) toward the east, and from the south (180°) toward the west. Magnetic declination is the angle between magnetic and true north, and considered positive east of true north, and negative when west. As a result of the Earth’s magnetic poles wandering slowly over the years, magnetic declination changes over time and location. Declination for Minot AFB (48.25o N- 101.21’W) in October 1968 = 12° 50' E changing by 0° 3' W/year. (See: National Geophysical Data Center).