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S
Second: 1/60th of a minute of a degree.
Seed Position: A latitude and longitude position fix
approximately equal to the current position that the
Apollo GX
uses to determine the location of
available satellites from which signals may be
received.
Selective Availability (SA): The degradation of
accuracy of GPS position fix data by the United States
Department of Defense for civilian use.
Space Vehicle (SV): A GPS satellite.
Statute Mile: A distance measurement equal to 5,280
feet or 0.87 of a nautical mile.
T
Three-dimensional (3D) Position Fix: A position fix
defined by latitude, longitude, and altitude.
Track (TRK): The imaginary line that the flight path
of an airplane makes over the earth.
Track Angle: The angle of your actual direction of
travel. Track angle is computed using the magnetic
variation at the Present Position.
Track Angle Error (TAE): The difference between
the Desired Track and the Track Angle (Dtk - Trk =
273
Glossary
TO
WPT
FROM
WPT
North
Track Angle
Error (Tae)
Present
Position
TRK
DTK
Summary of Contents for Apollo GX 50
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Page 17: ...I 270 K 270 L 270 M 270 N 271 O 272 P 272 R 272 S 273 T 273 U 274 V 274 W 274 xv ...
Page 18: ...xvi ...
Page 88: ...Notes 70 Moving Map Functions ...