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-   -   Crossing ATZ above 2000ft - need to call in? (https://www.pprune.org/private-flying/451572-crossing-atz-above-2000ft-need-call.html)

chevvron 15th May 2011 09:01

Stapleford is not FISO as Wsempson says but A/G. On LARS North or East I would tell pilots to 'keep your own separation from XXXX ATZ', which reminds the pilot he/she is approaching an active ATZ, and gives them leeway to either avoid or call for transit. Unfortunately the powers that be disagreed with this phraeology, hence 'you are approaching XXXX ATZ, what are your intentions? became the official CAP413 words.

TractorBoy 15th May 2011 12:55


My solution is to not fly in that area

Otherwise, I would pass N of Stapleford at 1400 ft, well outside their ATZ and keeping a very good lookout (an awful lot of UK GA flies at 1000-1500ft) and getting out of there really fast.
I wouldn't recommend that TBH. That would put you slap bang in the middle of North Weald. It doesn't have an ATZ but can get extremely busy. Especially if you end up meeting one of the many formations that fly in and out, or some of the many jets based there might be operating that day. And don't forget the circuit height is 1100ft, so you'd only be a maximum of 400ft above it. At Stapleford, you could in theory be 1300ft above circuit traffic.

Overfly Stapleford and keep a listening watch on the radio. Much safer.

UV 15th May 2011 18:26


And don't forget the circuit height is 1100ft, so you'd only be a maximum of 400ft above it.
Technically, that would put you inside Stansted's airspace (1500 feet and above)! In reality it's 300 feet seperation.
However, dont forget jet circuit traffic at NW flies at 1000 feet AAL (1300 QNH) so your seperation form them is only 100 feet!

rkgpilot 15th May 2011 19:45

Even safer to get Class D zone transit and have up to 2500' available.

Anybody tried or done this?

TractorBoy 15th May 2011 20:27


Technically, that would put you inside Stansted's airspace (1500 feet and above)! In reality it's 300 feet seperation.
However, dont forget jet circuit traffic at NW flies at 1000 feet AAL (1300 QNH) so your seperation form them is only 100 feet!
OK - I didn't want to put maximum of 399ft!

Didn't know jets are 1000ft AAL at NW though. And I've been there 2 years !

Golf-Mike-Mike 15th May 2011 20:39

Hi Adam, I've flown over or close to Stapleford many times and do usually transfer to Stapleford Radio - particularly if Farnborough suggest it, as they may have noticed radar traces in the area with no altitude readouts. On a "Basic Service", Stapleford will generally confirm their QNH, runway in use and any known circuit, joining or over-flying traffic. I have never found them anything but helpful and indeed grateful for your call when you transfer back to Farnborough, as you're helping them maintain awareness of what you're up to. As others have said, it's good airmanship to keep others aware of your whereabouts and intentions and since the local traffic will probably be on 122.8 and not a Farnborough frequency, you get the information first-hand and can visualise any potential conflicts. In practice I fly at 2300ft, 2-3nm to the south of Stapleford (using DME from the LAM VOR), which avoids any of the North Weald / 1500ft stuff mentioned elsewhere, keeps you just north of the London City control area, and is also outside the 2nm radius of Stapleford's ATZ as well as being above it.

soaringhigh650 16th May 2011 17:01

General rule of thumb:

Unless instructed otherwise by ATC, talk to the facility for the area that you are currently in, or about to go in

If you follow this rule you can't go too far wrong. ;)

NigelOnDraft 16th May 2011 17:38


Didn't know jets are 1000ft AAL at NW though. And I've been there 2 years !
I instruct on the JPs at NW. Yes - the circuit is supposed to be at 1000'. But they students are working hard, and anything from 800' to 1180' might be encountered :rolleyes:

NoD

UV 16th May 2011 18:39


OK - I didn't want to put maximum of 399ft!
I have recalculated it and the seperation is actually...1499 ft - 321ft (elevation) -800ft (Circuit height) = 378ft.

That was not a serious comment btw!!


Didn't know jets are 1000ft AAL at NW though. And I've been there 2 years !
Come and visit us in the Tower one day, we have tea and coffee and hardly ever get a visitor!


Even safer to get Class D zone transit and have up to 2500' available.

Anybody tried or done this?
Good idea, and Yes I've done it many times in the past, but not recently.

TractorBoy 16th May 2011 18:41


Come and visit us in the Tower one day, we have tea and coffee and hardly ever get a visitor!

I'll take you up on that. I've always wanted to visit the tower at NW but wasn't too sure how accessible it was.

DeeCee 17th May 2011 09:33

To answer the original question.............when I flew from Stapleford it was usual to do a downwind join at 1200'. The safest place to cross would be across the middle at 2200' because other aircraft joining would be quite a bit lower over the top of the airfield whatever the runway and direction of approach.

I suggest that it would be good practise to call and let them know, thereby letting other people know at the same time. Instructors particularly are used listening out for that sort of message and hopefully anyone else crossing LAM would be listening out as well.

I don't think that the possibility of hearing a gruff response should put you off - it can't be as gruff now as it was when I was there!

Morris542 17th May 2011 11:22


On a "Basic Service", Stapleford will generally confirm their QNH, runway in use and any known circuit, joining or over-flying traffic
Just a quick off-topic question to clarify something. Stapleford are A/G so are not able to give a Basic Serice, is that right? I fly from a busy A/G airfield in the South East and have never heard any type of service given (although one chap once asked for a Traffic Service!).

Conventional Gear 17th May 2011 12:08


Just a quick off-topic question to clarify something. Stapleford are A/G so are not able to give a Basic Serice, is that right? I fly from a busy A/G airfield in the South East and have never heard any type of service given (although one chap once asked for a Traffic Service!).
yep that is right, you are not getting a 'service' ever from an A/G airfield.

flyme273 17th May 2011 16:14

Concur with IO540. Better to stay with Farnborough, who can provide some type of service. Hopefully their radar screens have conflict software. Calling Stapleford only blocks their frequency and serves to distract attention.

In any event what would Stapleford ATC reply say on a busy day, "6 in circuit, 8 joining and traffic in transit height unknown"? Not much help.

flyme.

ShyTorque 17th May 2011 20:46

There is no ATC at an A/G station.

But I wouldn't fly through the overhead of any airfield at that relatively low altitude without at least announcing my presence on the frequency.

Jan Olieslagers 17th May 2011 20:50

... and apart from presence on the frequency (which might be obvious to a good listener) one could even announce being in their whereabouts...?

bad bear 17th May 2011 21:57

look out
 
I just cant get my head round some pilots need to use the radio so much. Every time some one is looking in to change the frequency on their radio they are not looking out. I would only dial up the frequency if I was thinking I might have to land or might need to call for a transit. Apart from that I would prefer to be on a frequency that has radar or simply look out.
bb

ShyTorque 17th May 2011 22:24

The ones that worry me most are the ones who rely on so-called lookout but have little understanding of the limitations of human eyesight in an aviation context.

MichaelJP59 18th May 2011 09:26

Seems to me two competing arguments;

1) Call the airfield to let them know you're transiting.
- Risk is you're heads-down switching frequencies, also you're no longer getting wider traffic info from LARS.

2) Stay with the LARS frequency.
- Risk is airfield traffic doesn't know you're transiting. Also you don't know any special airfield activity.

Which risk is higher? Very difficult to say.. especially in the case referred to with North Weald so close by.

DeeCee 18th May 2011 10:30

Competing arguments yes, but this is a very busy corner for traffic going around London using LAM (which is on the airfield for those that don't know). A call might alert sombody doing the same thing as you.

Sorry chaps I cannot understand why you would not call, and as for selecting the frequency, this could be one button push.

Maybe some of you are not familiar with this area. It's very busy with lots of controlled airspace and I would certainly use the radio as much as necessary to let appropriate stations know my intentions.


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