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| Tacan |
Tactical Air Navigation |
| TDOP |
Time dilution of precision, See DOP |
| Time To Go (TTG) |
Digital reading showing the time remaining from your current
position to the next waypoint. This function takes into account
your Distance To Go (DTG), and your Velocity Made Good (VMG)
to give you as closely as possible the amount of time left to
reach your waypoint. Displayed in hours, minutes and seconds,
it will continue counting down until your waypoint is reached. |
| TOE |
Time of Ephemeris. |
| TOW |
Time of week, in seconds, from midnight Sunday UTC. |
| Translocation |
A version of relative positioning that makes use of a known
position, such as a National survey station, to aid in the accurate
positioning of a desired new point. The initial position (coordinates)
is used as a starting point, then the three-dimensional differences
measured by GPS are used to calculate the position (coordinates)
of the second point. |
| Trop |
Tropospheric correction. The correction applied to the measurement
to account for tropospheric delay. |
| Tropospheric correction |
The correction applied to the measurement to account for
tropospheric delay. |
| True and Magnetic
North |
True north is the top of the world, where all lines of longitude
converge. Magnetic north is the location our compasses point
to; it lies several hundred miles to the south of true north,
at a location in Canada. |
| True Bearing |
The bearing of an object relative to true North. If you are
facing East with an object to your South, it has a true bearing
of 180°. |
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C D
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