CHAPTER 3. Navigation

Late Descents

Beginning the descent beyond the planned top-of-descent point means that you will have the same amount of excess altitude, but a shorter distance and time to lose it, as shown in Figure 3-36.

Since flying beyond the planned top-of-descent point leaves less time to lose excess altitude, your goal is to minimize the “overrun” distance by slowing the aircraft as soon as a late descent scenario is suspected. A lower speed means you will cover less distance in the same amount of time, and thus be left with more time to lose altitude.

 
 
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