How many DME channels does the aircraft have?

How many DME channels does the aircraft have?

• A. Four
• B. Six
• C. Eight
• D. Twelve

Answer: (B)

DME channels are the separate paths the DME system uses to interrogate ground beacons and receive distance readings. The CRJ-550’s navigation setup is designed to handle multiple such channels for redundancy and to track more than one beacon at a time. In this aircraft, the DME system provides six channels, giving enough capacity to support primary and standby operation while still allowing concurrent interrogations to multiple beacons. Four would be insufficient for robust redundancy and multi-beacon use, while eight or twelve would exceed the aircraft’s standard DME hardware configuration.

DME channels are the separate paths the DME system uses to interrogate ground beacons and receive distance readings. The CRJ-550’s navigation setup is designed to handle multiple such channels for redundancy and to track more than one beacon at a time. In this aircraft, the DME system provides six channels, giving enough capacity to support primary and standby operation while still allowing concurrent interrogations to multiple beacons. Four would be insufficient for robust redundancy and multi-beacon use, while eight or twelve would exceed the aircraft’s standard DME hardware configuration.