Direction finder AD 200; manufactured by Marconi, Marconi's Wireless Telegraph Co Ltd, Chelmsford, Essex, UK.

• Principle: Direction finder
• Operation modes:
• Frequency range: VHF aeronautical radio
• Sensitivity: AM (A3) / Selectivity:

• Mains operation: probably

• mm, kg

In one list of Air Force wireless equipment, there is an entry of Marconi AD 200 having the designation P-714, probably corresponding to the Marconi VHF Airport Direction Finder AD 200 from 1955.

The set provides automated direction finding of approaching aircraft on two VHF frequencies.