SVFR viz - helicopters

[walkabout]

Hi
What is the limit on viz for a svfr transit in the London TMA for a helicopter?
I'm getting conflicting opinions at the moment and hoped that someone here could clarify the situation for my own mind.
Thanks
W

[HEATHROW DIRECTOR]

Don't think you really mean the London TMA. There are limits from transitting the London Control Zone and for crossing Heathrow and these are detailed in the AIP.

[walkabout]

Sorry you're right I meant the London Control Zone. I am aware that svfr is only available in a control zone.
I have been to the AIP ENR 1-2-1 but couldn't find any reference to svfr limit for transits or the heliroutes there. Am I looking in the correct section?
W
OK HD have found it in AD specific section.... 1km viz, 2km if landing at, taking off from or crossing LHR.

[Roffa]

You need to go to the Heathrow specific text data (http://www.ais.org.uk/aes/pubs/aip/pdf/aerodromes/302LL01.PDF) and scroll down to around EGLL AD 2.22 section 8 or thereabouts.

[walkabout]

Had just located it but thanks anyway Roffa.

[chaka534]

others are correct here to issue of fly svfr in london control zone you have to have 1000m horizontal and the cloud ceiling needs to above 600ft agl--rgds

[Roffa]

chaka,

Assuming you're talking about helicopters, and specifically helicopters on the heli-routes as you mention 1km viz, what's your reference for the cloud ceiling requirement?