Glossary of Navigation Terms | Apollo 360 Map Display |
NNautical Mile (nm): A distance measurement equal to 6,076 feet, or 1.15 statute mile. One nautical mile is also equal to one minute of latitude.
N o n - d i r e c t i o n a l B e a c o n ( N D B ) : A l o w frequency/medium frequency navigation aid sending
PPosition Dilution of Precision (PDOP): A merit value for the calculated position based on the geometrical configuration of the satellites used; 3 is considered good, greater than 7 is considered poor.
RRadial: Any of the 360 magnetic courses from a VOR or similar navigational aid, beginning at the navigational aid and proceeding outward in a straight line.
Range (RNG): The distance from the present position to a destination waypoint.
SSecond: 1/60th of a minute of a degree.
Statute Mile: A distance measurement equal to 5,280 feet or 0.87 of a nautical mile.
T
Track (TRK): The imaginary line that the flight path of an airplane makes over the earth.
True North: Geographic north, at the earth’s north pole.
Tower (TWR): Airport tower communication frequency
UUNICOM: The radio frequencies assigned to aeronautical advisory stations for communication with aircraft.
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