VDF

#1. What is the approximate maximum theoretical range at which an aircraft at FL130 could receive information from a VDF facility, which is sited 1024 FT above MSL?

• A180 NM
• B220 NM
• C120 NM
• D150 NM

#2. VDF accuracy may be decreased by?

• ADiurnal variation.
• BSite and propagation errors
• CNight effect
• DCoastal effect

#3. VDF is not affected by the other options listed in this question. The maximum theoretical range at which an aircraft at which an aircraft at FL80 can obtain bearings from a ground VDF facility sited 325 FT above MSL is:

• A158 NM.
• B107 NM.
• C114 NM.
• D134 NM.