This category covers 15 topics and has 26 questions.

• DME Freq Diff
• EPC Reason
• DME Jiggered PRF Reason
• DME Delay Reason
• DME PP Reason
• DME Interrogation
• DME Saturation
• DME Tuning
• DME Nolockon
• DME Lockon
• DME Range Accuracy
• DME Range
• DME Speed Accuracy
• DME Hold Entries
• TACAN Purpose