3 / 20
Which one of the statements below regarding the distance from departure to the Point of Equal Time (PET) is correct?
  • A
    The distance from departure to PET is directly proportional to the sum of ground speed out and ground speed back.
  • B
    The distance from departure to PET is inversely proportional to the sum of ground speed out and ground speed back.
  • C
    The distance from departure to PET is inversely proportional to ground speed back.
  • D
    The distance from departure to PET is inversely proportional to the total distance.

The Point of Equal Time (PET) allows a pilot to decide which is the quickest landing area to get to. It is the position of a point on a track, where it is as quick to go on, as it is to turn back. The PET can be also called Equal Time Point (ETP) or Critical Point (CP).

The formula to calculate the position of the PET is:

  • Distance to PET = (D x H) / (O + H)

Where:

  • D: Sector Distance
  • O: Groundspeed Out
  • H: Groundspeed Back

Since the sum of the Groundspeed "out" and Groundspeed "back" (O + H) consists the denominator of the above fraction, then the distance to PET is inversely proportional to the sum (denominator).

And since the Sector distance (D) and the Groundspeed Home consist variables of the numerator of the above fraction, then the distance to PET is directly proportional to the D and H variables.

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.

Keyboard Shortcut Use Keyboard Shortcuts