INDIGO RADIO NAVIGATION

#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?

What approximate rate of descent is required in order to maintain a 3° glidepath at a groundspeed of 90 kt?

The azimuth transmitter of a Microwave Landing System (MLS) provides a fan shaped horizontal approach zone which is usually: