it is called minimum separation distance, correct?
As far as safety, that is relative. LHR does appear to have quite the distinction on wake encounters.
In 2010, 65% of the reported wake encounters reported were at LHR. of the 210 encounters at Heathrow, 74 were below 500 feet, with another group of 100 at 4500 feet (where the turns come on to final)
Of the 74 below 500, 32 were listed as severe.
And from 2007
Highlights from the 2007 NATS Wake Vortex Analysis Report were:
- Prime aim was to monitor spacing effectiveness and identify follow-up actions to address.
- The value of the report relies on accuracy and capture of all relevant facts.
- 227 reports in UK airspace in 2007 of which 54 were severe – 197 reports in 2006. The majority were inbound/outbounds at Heathrow. A trial has just commenced at Heathrow using LIDAR to investigate further.
WAKE TURBULENCE ENCOUNTER SCHEME WORKING GROUP (WEWG)
LHR 2015
Landings at San Diego Int Airport Nov 23, 2012 - YouTube