What accuracy of bearing is indicated if Air Traffic Control (ATC) give you a VDF bearing, of '225 Class Charlie'?
According to ICAO Annex 10, the VDF information is divided into four classes A, B, C and D. The classes are defined by the range of accuracy defined by degrees, based on the following table:
| Classes | Accurate to a range within |
| Class A | ± 2° |
| Class B | ± 5° |
| Class C | ± 10° |
| Class D | Less than Class C |
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