EGCC TMA altimeter setting question.
 

Hi guys I am a quite low hours microlight pilot and have asked this question of other pilots but with conflicting advise, if I were flying under the manchester TMA to the north say around the winter hill area where the base of CAS is 3500ft, should I be setting the manchester QNH or the barnsley or even the std setting 1013 if above 3000ft, and if flying in this area would you guys prefer a call or just go about my buisness.

Nick.

magpienja.
Definately the Manchester QNH. You can get it by listening to the arrival ATIS on 128.175. From an ATC perspective Manchester Approach would have no real interest in your operation in the Winter hill area but Warton or Blackpool may very be interested as they could have traffic descending out of controlled airspace in that area. With my pilots hat on. I'd call Warton if they're open. Blackpool if they're not.

Spiney.

Many thanks spiney that clears that up for me.

Nick.

Interesting question for Spiney - I do not know the answer. What is the TA in that area below the TMA where its base is 3500', or higher?

For magpinja - don't forget to swap back to the appropriate setting before you go alsewhere!

BOAC.
The answer is...........
4 Selected Transition Altitudes
4.1 The following Transition Altitudes apply to flights within or beneath the following Airspace:
† Note: Outside the notified hours of operation the Transition Altitude is 3000 ft.
ENR 1-7-2 (24 Nov 05) UK AIP
ENR 1.7 — ALTIMETER SETTING PROCEDURES
Aberdeen CTR/CTA 6000 ft
Belfast CTR/TMA 6000 ft
Birmingham CTR/CTA 4000 ft
Cardiff CTR/CTA 4000 ft
Durham Tees Valley CTR/CTA 6000 ft †
Edinburgh CTR/CTA 6000 ft
Glasgow CTR 6000 ft
Leeds Bradford CTR/CTA 5000 ft †
London TMA 6000 ft
Manchester TMA 5000 ft
Newcastle CTR/CTA 6000 ft
Nottingham East Midlands CTR/CTA 4000 ft
Scottish TMA 6000 ft
Solent CTA 4000 ft †
Sumburgh CTR/CTA 6000 ft †
I apologise for my pasting which didn't turn out quite as I thought!!!!!
Spiney

Ta! So it does indeed 'cast a shadow'.

TMA bases are set as AMSL. Fly underneath one not using the AMSL pressure - therefore the TMA QNH - and you won't know exactly where the base is so a CAS infringement is a possibility.