An aircraft is equipped with a DME receiver that can provide a read-out of ground speed. It is climbing
on a heading of 270°(T), and is crossing the 330 radial from a VOR/DME station. The ground speed
calculated by the DME computer is….

Question

An aircraft is equipped with a DME receiver that can provide a read-out of ground speed. It is climbing 
 on a heading of 270°(T), and is crossing the 330 radial from a VOR/DME station. The ground speed 
 calculated by the DME computer is….

Accepted Answer

less than the actual ground speed because the change in slant range is smaller than the 
 change in ground distance.

Answer

inaccurate because the aircraft is moving away from the station and the slant range error 
 becomes more significant with distance.

Answer

greater than the actual ground speed because the change in slant range is greater than the 
 change in ground distance.

Answer

exactly correct because the aircraft slant range is increasing at the ground speed due to the 
 climb.

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An aircraft is equipped with a DME receiver that can provide a read-out of groun...

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