Editing Heathrow arrival stacks (section)

==The stacks==
===Bovingdon===
The Bovingdon stack is for arrivals from the north west. It extends above the village of [[Bovingdon]] and the town of [[Chesham]], and uses the RNAV waypoint BNN (co-located with the BNN VOR), which is situated on the former [[RAF Bovingdon]] airfield.

===Biggin Hill===
The [[Biggin Hill]] stack on the south east edge of Greater London is for arrivals from the south east.  It uses the RNAV waypoint BIG (co-located with the BIG VOR), which is situated on [[London Biggin Hill Airport]].

===Lambourne===
The [[Lambourne]] stack in Essex is for arrivals from the north east.  It uses the RNAV waypoint LAM (co-located with the LAM VOR), which is situated adjacent to [[Stapleford Aerodrome]].

===Ockham===

The [[Ockham, Surrey|Ockham]] stack in Surrey is for arrivals from the south west.  It uses the RNAV waypoint OCK (co-located with the OCK VOR), which is situated on the former [[Wisley Airfield]]. During typical easterly operations, the proximity of arrival traffic via OCK requires departures from Heathrow's runway 09R towards the Compton VOR (CPT) to follow a non-standard departure procedure.