Final answer:
A DME (Distance Measuring Equipment) distance is not affected by slant range. DME measures the time it takes for a radio signal to travel to and from the aircraft and a ground-based beacon.
Step-by-step explanation:
A DME (Distance Measuring Equipment) distance is not affected by slant range.
DME is a navigation system used in aviation to determine the distance between an aircraft and a ground-based beacon. It measures the time it takes for a radio signal to travel to and from the aircraft and the beacon. This measurement is not affected by the slant range, which is the straight-line distance between the aircraft and the beacon.
For example, if an aircraft is flying directly towards a beacon, the slant range will be shorter than the actual distance between the aircraft and the beacon. However, the DME distance will still accurately indicate the true distance.