Do all localizer antennas provide DME?

Do all localizer antennas provide DME?

• A. Yes
• B. No
• C. Sometimes
• D. Only with certain frequencies

Answer: (B)

The localizer delivers lateral guidance using a VHF signal, while DME provides distance using a separate UHF ground transmitter and the aircraft’s DME receiver. Not every localizer installation includes that DME capability, so you can have a localizer without DME. Only installations labeled as LOC-DME or those paired with a VOR/DME (or another DME source) provide DME. If you tune a localizer and don’t see a DME readout or there’s no LOC-DME facility referenced, there isn’t DME available.

The localizer delivers lateral guidance using a VHF signal, while DME provides distance using a separate UHF ground transmitter and the aircraft’s DME receiver. Not every localizer installation includes that DME capability, so you can have a localizer without DME. Only installations labeled as LOC-DME or those paired with a VOR/DME (or another DME source) provide DME. If you tune a localizer and don’t see a DME readout or there’s no LOC-DME facility referenced, there isn’t DME available.