Before revision: }The combination of both allows for a precision approach in foul URL Beam systems Beam systems broadcast narrow signals in the sky, and navigation is accomplished by keeping the aircraft centred in the beam.
After revision: VOR/ILS Testing with Signal Generator SMT</ref>}The combination of both allows for a precision approach in foul URL Beam systems Beam systems broadcast narrow signals in the sky, and navigation is accomplished by keeping the aircraft centred in the beam.