Science / Tides and Currents / Azimuth: Azimuth of a body is the arc of the horizon intercepted between the north or south point and the foot of the vertical circle passing through the body. It is reckoned in degrees from either the north or south point clockwise entirely around the horizon. Azimuth of a current is the direction toward which it is flowing, and is usually reckoned from the north point.
Science / Tides and Currents / Magnetic Azimuth: Azimuth reckoned from the magnetic north or magnetic south. See magnetic direction. MORE
Science / Weather / Plan Position Indicator: Also known as a PPI Scope, it is a radar indicator scope displaying range and azimuth of targets in polar coordinates. MORE