Which of the following will give the most accurate calculation of aircraft ground speed?

Question

ATPL - Airline Transport Pilot license - Radio Navigation - Which of the following will give the most accurate calculation of aircraft ground speed?

QuizVDS · Accepted Answer

A DME station sited on the flight route

QuizVDS · Answer

A DME station sited across the flight route

QuizVDS · Answer

A VOR station sited on the flight route

QuizVDS · Answer

Yellow to amber to blue

ATPL: Which of the following will give the most accurate calculation of aircraft ground speed?