| It transfers the information given by a VOR/DME station into tracking and distance indications to any chosen Phantom Station/waypoint |
| It calculates cross track information for NDB approaches |
| It automatically selects the two strongest transmitters for the Area-Nav-Mode and continues working by memory in case one of the two necessary station goes off the air |
| VOR/DME Area Navigation computer is receiving neither radial nor distance data information from VOR/DME stations. |
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