Describe the DME ID signal?

• A. It is heard continuously during DME operation
• B. It is lower pitched than the VOR/LOC ID
• C. It is heard once every three or four times the VOR/LOC ID is heard and is higher pitched
• D. It indicates the DME distance in nautical miles

Answer: (C)

The DME ident is an audible signal that serves to identify the DME channel, and it is distinct from the VOR/LOC ident. It isn’t heard continuously; instead it comes through as a higher-pitched tone and is played at a slower cadence—typically once for every three or four times the VOR/LOC ident is heard. This higher-pitched, intermittent signal lets you tell that you’re receiving the DME portion of the facility, not just the VOR/LOC. The DME readout that shows distance in nautical miles is a separate display and is not the ident itself.