What range does a phantom station give?
Area navigation (RNAV) is a general term used to describe the navigation from point A to point B without direct over flight of navigational aids, such as VOR stations or ADF nondirectional beacons.
It includes VORTAC and VOR/DME based systems, as well as systems of RNAV based around LORAN, GPS, INS, and the FMS of transport category aircraft.
However, until recently, the term RNAV was most commonly used to describe the area navigation or the process of direct flight from point A to point B using VORTAC and VOR/DME based references which are discussed in this section
All RNAV systems make use of waypoints.
A waypoint is a designated geographical location or point used for route definition or progress-reporting purposes.
It can be defined or described by using latitude/longitude grid coordinates or, in the case of VOR based RNAV, described as a point on a VOR radial followed by that point’s ground distance from the VOR station (i.e., 200/25 means a point 25 nautical miles from the VOR station on the 200° radial).
Annex illustrates an RNAV route of flight from airport A to airport B.
The VOR/DME and VORTAC stations shown are used to create phantom waypoints that are overflown rather than the actual stations.
This allows a more direct route to be taken.
The phantom waypoints are entered into the RNAV course-line computer (CLC) as a radial and distance number pair.
The computer creates the waypoints and causes the aircraft’s CDI to operate as though they are actual VOR stations.
It includes VORTAC and VOR/DME based systems, as well as systems of RNAV based around LORAN, GPS, INS, and the FMS of transport category aircraft.
However, until recently, the term RNAV was most commonly used to describe the area navigation or the process of direct flight from point A to point B using VORTAC and VOR/DME based references which are discussed in this section
All RNAV systems make use of waypoints.
A waypoint is a designated geographical location or point used for route definition or progress-reporting purposes.
It can be defined or described by using latitude/longitude grid coordinates or, in the case of VOR based RNAV, described as a point on a VOR radial followed by that point’s ground distance from the VOR station (i.e., 200/25 means a point 25 nautical miles from the VOR station on the 200° radial).
Annex illustrates an RNAV route of flight from airport A to airport B.
The VOR/DME and VORTAC stations shown are used to create phantom waypoints that are overflown rather than the actual stations.
This allows a more direct route to be taken.
The phantom waypoints are entered into the RNAV course-line computer (CLC) as a radial and distance number pair.
The computer creates the waypoints and causes the aircraft’s CDI to operate as though they are actual VOR stations.
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