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Old 19th Feb 2020, 11:06
  #12 (permalink)  
DaveReidUK
 
Join Date: Jan 2008
Location: Reading, UK
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Originally Posted by DFS346
For example position 1 to position 2 = 5 nm in 4 minutes = ground speed 75 knots​​​​​​​
How do you know that the distance from Position 1 to Position 2 is 5 nm ?

All I can see is that P1 is 5 miles closer than P2 to some unspecified DME.
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