We have just been informed that an airspace change
trial will be held between 30 April-30 September 2015 on the operation
of the Ockham stack.
The Ockham stack is one of four areas where
aircraft are held at busy times awaiting landing space at Heathrow
Airport. Aircraft held in the stack fly an elongated circular pattern
extending as far south as Dorking and as far east and
west as Ashtead and Little Bookham respectively. The area can contain
up to nine aircraft ‘stacked’ vertically at 1000ft intervals from a base
of 7,000ft. Further details are given in the attached fact sheet and
flight maps.
The trial will test the use of performance based
navigation techniques (PBN, sometimes called PRNAV) for operating the
stack as a replacement for the ground-based beacon at Ockham that
currently guides aircraft into the holding pattern.
National Air Traffic Services (NATS) who are
conducting the trial say it is not expecting any perceptible change on
the ground because the position and height of the stack is not changing,
and a similar trial at another stack at Biggin
Hill has not resulted in flightpath concentration.
However, if any residents are disturbed by aircraft
noise as a result of the trial, please let me know and/or advise them
to register a complaint to Heathrow Airport by emailing
noise@heathrow.com or using the complaint form on the Heathrow Airport website at:
http://www.heathrowairport.com/noise/what-you-can-do/make-a-complaint-about-noise .
Yours faithfully
Guy Davies
Principal Planning Policy Officer
Mole Valley District Council
01306 879281
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