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Old 5th Oct 2016, 23:08
  #16 (permalink)  
DaveReidUK
 
Join Date: Jan 2008
Location: Reading, UK
Posts: 10,825
Originally Posted by A30yoyo View Post
I'm just making the point that it was considered wise in 1948 to double the stack separation to 1000ft and now aircraft are up to 8x heavier (with stronger wakes), up to 2x larger (linear) and faster in the stack so is the separation still proportionate? Has it been reviewed in the light of airmiss statistics?
Airmisses involving aircraft in the hold are extremely rare.

ATC can monitor aircraft altitudes much more closely than they could in 1948.
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