VDF

#1. An aircraft has to communicate with a VHF station at a range of 300 nm, if the ground station is situated 2,500' amsl which of the following is the lowest altitude at which contact is likely to be made?

#2. Class ‘B' VHF DF bearings are accurate to within:

#3. An aircraft at altitude 9,000 feet wishes to communicate with a VHF/DF station that is situated at 400 feet amsl. What is the maximum range at which contact is likely to be made ?