Go Back  PPRuNe Forums > Ground & Other Ops Forums > ATC Issues
Reload this Page >

refusing access to class D airspace?!?

Wikiposts
Search
ATC Issues A place where pilots may enter the 'lions den' that is Air Traffic Control in complete safety and find out the answers to all those obscure topics which you always wanted to know the answer to but were afraid to ask.

refusing access to class D airspace?!?

Thread Tools
 
Search this Thread
 
Old 8th Jul 2003, 02:55
  #21 (permalink)  
 
Join Date: Sep 2002
Location: UK
Posts: 1,294
Likes: 0
Received 0 Likes on 0 Posts
I may be wrong here but I believe the reason that the CAA are trying to find out whether or not aircraft are being refused Zone transits of Class D airspace is not about a Witch hunt but about establishing if the airspace categories are correct at a number of units.

Certainly we are all aware how much traffic levels have risen within the last 10 years and perhaps it is time that Class C airspace is introduced at certain Airfields. This of course will still mean zone transits are available by VFR aircraft but they will be under control with standard seperation against other traffic.

I'm not to sure how the GA community would react to this.

I personally like the flexibility of Class D airspace but work at a unit which is properly served by it unlike a whole host of airfields whose traffic levels have risen greatly.

I am also sure that units would like enough CAS around them to offer low level corridors to VFR transiting aircraft but we are squeezed into the minimum amount of CAS they can get away with giving us to protect our approaches and climb outs.
flower is offline  
Old 8th Jul 2003, 05:08
  #22 (permalink)  
Warped Factor
Guest
 
Posts: n/a
Normal Flights :

(1) Flights which have filed a flight plan in the normal way and conforming with normal routing procedures.

(2) Initial instrument flight tests conducted by the CAA Flight Examining Unit (RTF callsign EXAM)
So number (1) must cover an abbreviated flight plan being filed by VFR traffic on the r/t. That's a normal procedure is it not?

WF.
 
Old 8th Jul 2003, 06:54
  #23 (permalink)  
 
Join Date: Oct 2002
Location: frozen norff
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts
Angry

Having read Mr. Skinner's piece in GATCO about access to transit class D airspace, I am stunned at his arrogance.He believes that by simply announcing certain details correctly ATC should allow immediate and unimpeded transit thru' said airspace!!!

DO WOT!!!?

Try that at some airfields, Mr. Skinner, and those of you sitting on the right-hand side will see a B737 approaching you at 150kts, passing through the airplane, and departing through the left-hand window.

Safety means GAPS between airplanes, Mr.S, ALL 'planes.Wether you pay a navigation charge or not.
JustaFew is offline  
Old 8th Jul 2003, 15:36
  #24 (permalink)  
Final 3 Greens
Guest
 
Posts: n/a
Just a Few

I have not read Mr Skinner's article, but what you describe was achieved perfectly safely with the VFR corridor through LAX class B (A to us) airspace, which is the busiest airspace that I have ever flown in.

Your attitude, sadly, suggests a mind focused on how things cannot be achieved, rather than how they can.

We all know that UK airspace is a challenge, but posting comments like your previous unfortunately sounds arrogant, even if it was proviked by a piece that you thought was arrogant.

Last edited by Final 3 Greens; 8th Jul 2003 at 16:06.
 
Old 8th Jul 2003, 15:54
  #25 (permalink)  
 
Join Date: Feb 2003
Location: Outlawed
Posts: 561
Likes: 0
Received 0 Likes on 0 Posts
There seem to be a few controllers on this thread stuck in a civil service type mentality.
If a shop has too many customers, you employ more staff, not shut it at its busiest periods. You should remember that we are ALL your customers (and paying the govt tons of money through fuel duty for starters) and your job is to assist us, not moan because we're there.
If you are understaffed, what are you doing personally about it? Just waiting for an accident to happen so that you can say I told you so?

(All hard-working, non-moaning, helpfull and friendly controllers (which I accept is the majority) excused from this rant).
strafer is offline  
Old 8th Jul 2003, 16:17
  #26 (permalink)  
Final 3 Greens
Guest
 
Posts: n/a
I have just reviewed my copy of GASCO (not GATCO) and read Mr Skinners article.

Another poster said previously

He believes that by simply announcing certain details correctly ATC should allow immediate and unimpeded transit thru' said airspace!!!
Mr Skinner said "One the one hand, General Aviation pilots cannot expect to always have unfettered access to Class D airspace having given short notice by radio call of a requirement for tranist and in circumstances where it becomes apparent that adequate pre-flight preparation may not have been carried out. On the other hand a response from the air traffic to a properly announced request for transit by a pilot should not be refused on such grounds as "Unit working to capacity"."

I thought that it was reasonable to post this quote to allow readers to make up their own mind.
 
Old 8th Jul 2003, 16:55
  #27 (permalink)  
 
Join Date: Jan 2001
Location: I sell sea shells by the sea shore
Posts: 856
Likes: 0
Received 0 Likes on 0 Posts
My 2ps worth.... as a Controller and a Pilot.

Nobody so far has mentioned the phrase Duty of Care. Now, this may not mean anything to most GA pilots but is very much on the mind of ATCOs that ply their trade in class D (and E to G) airspace in the UK.

So what's is all about? Lets assume in an ideal world that GA is granted largely unfettered access to a Class D CTR, with appropriate traffic info and routings exactly as they want.

All well and good for a large number of well briefed, planned and executed VFR flights. Unfortunately some VFR flights are not so well thought out, or flown.

One day one of the "not so good" VFR flights enters class D, and gets it all horribly wrong and ends up very close to an Airliner with 130 souls on board. Avoiding each other is a joint responsibility, but at say 160kts and focused on the ILS the poor old B737 crew don't stand much chance of avoiding the non SSR equipped CUB wandering through the final approach track...... But hey, it's class D and it doesn't matter right? See and avoid, yeah? err No.

So, who's in the dock afterwards? You might well say that "Well, the ATCOs in the clear, he gave traffic info". Except that a barrister will not see it that way, nor will the relatives, nor will the public. They WILL see "130 people endangered for the sake of a joy ride" type headlines. And they may be right.

You see, ATCOs have a "Duty of Care" to all their charges, be they IFR or VFR, wherever they are. It may just be SAFER for the VFR flight to avoid class D airspace, due to the type of traffic in the CTR. The ATCO might just be doing you a favour.

It's already been stated that most Class D CTRs in the Uk are quite small. In my own (flying) experience routing around them doesn't add much time to my route, and the navigational challenge isn't beyond most PPLs, even me.

Oh, just one more thing. Fuel duty. As far as I'm aware NONE of the tax on AVGAS goes to the ATC providers at various class D airspaces in the UK, and the MoD picks up the tab for LARS. You get a VFR transit for FREE. ATC services are paid for by arrivals, be they IFR or VFR.

In the USA the FAA funds ATC (via the government). Airspace there is seen as a National Asset, available to all and funded accordingly (nowithstanding the latest FAA budget deficit). This isn't the case in the UK.

Well that's my 2ps worth. Feel free to disagree, argue the toss, whatever.... life's too short etc etc

Rgds BEX
BEXIL160 is offline  
Old 8th Jul 2003, 17:34
  #28 (permalink)  
 
Join Date: Sep 2002
Location: uk
Posts: 38
Likes: 0
Received 0 Likes on 0 Posts
Angry

I am shocked by some of what I have read here.

Trying to keep my temper. Here r some thoughts.

Pilots, please try to understand most ATCOs do their utmost to assist u.

We are employed by companies (be they airport authorities or NATS) who are subject to the same laws of commerce as any other business. Staff and facilities must be paid for. Simple economics would dictate priorities, let alone safety but let me come back to that. Understand that 50-80% of the normal daily workload for an average regional airport approach ATC unit could eaily be made up of traffic that produces no revenue for the said airport. Hmmm. Overall I could say that GA doesn't get such a bad deal after all?

Airspace. Every unit I have worked at has not had enough airspace in my view. That includes class A and D, both in the UK and abroad. From a GA viewpoint u may think that the airspace is pretty empty but from an ATCO standpoint I can assure u it is not.
It is excrutiatingly difficult to try to change airspace boundaries and I would offer my humble opinion that SAFETY is not given the weighting that it deserves. Small CTRs and CTAs increase ATCO workload, decreasing efficiency. How efficiently I am able to work has a direct impact on the services I am able to provide. There are some pilots in the GA (and Military!) community who appeal against CAS expansion who may like to consider that their interests may be better served by adopting a different view.

And the UK is not the only place with problems. Let's not adopt too much of a "grass is greener" mentality.

Access. As a keen outdoors person I have some sympathy with the GA community on this issue. Be it freedom to roam on moorland or in the sky it is the same concept of access. Safety is my paramount concern, though, as an ATCO. Please try to understand that see and be seen rules which may work very well between a couple of Cessnas are rather redundant when it comes to airliners travelling between 230-180knots (approx initial and intermediate approach speeds. Pax pay money for their seat on an aeroplane. They deserve certain levels of safety and protection. Your right to play is, rightly, of lesser importance.

As ATCOs we r increasingly thinking with a "at the subsequent court of enquiry..." mentality. Please understand that we do not wish to be doing so. It is a distraction that we must increasingly face, though. A military ATCO recently went through a court martial process lasting some considerable time that involved charges relating to the provision of a RIS. The ATCO involved in the mid air collision on the German-Swiss border is, I understand, still on manslaughter charges from both Swiss and German authorities. There have been court decisions recently in Holland that give grave cause for concern. Personal versus corporate responsibility is an issue for us. Should we make or be viewed to make a mistake, (be they of our own fault or due to human factors, technical failures, lack of infrastructure... the list is endless) it has very serious repercussions. My livelyhood, conscience and freedom are ultimately at risk every time that I am at work. I don't wish to sound melodramatic, only trying to make a point.

ATCOs are professionals. We take a pride in our work. That means trying to provide the best service that we can to everyone that we can all of the time.

If it feels to any of the GA community that ATC aren't being helpful, remember that we can feel that the reverse is true. We could all do ourselves a favour by tyring to understand the fuller picture.

At the end of the day my frustration is with those in the GA (and Military!) world who seem to have a lot of opinion but little true appreciation of modern commercial civil aviation.
Eggs Petition is offline  
Old 8th Jul 2003, 17:58
  #29 (permalink)  
Final 3 Greens
Guest
 
Posts: n/a
BEXIL

non SSR equipped
I would regard this as being a responsible and highly reasonable judgement for instructing an aircraft to remain outside controlled airspace. I wouldn't even waste your time asking if my transponder was u/s.

Is there any ATCO out there who accepts Class D traffic without a verified squawk?

You get a VFR transit for FREE
I don't see it that way. The arrivals pay for the system as it suits their businessness. Providing VFR transist is compensation to those of us who are affected by the system. I would say it's a fair trade off and personally I try to avoid class D as part of that deal, using it rarely and appreciating the benefits it gives all involved.

Eggs Petition

Understand that 50-80% of the normal daily workload for an average regional airport approach ATC unit could eaily be made up of traffic that produces no revenue for the said airport
Thats the price you pay for owning the franchise. Commercial thinking often involves taking the bigger picture and GA/Mil are stakeholders in your business activities.

Please try to understand that see and be seen rules which may work very well between a couple of Cessnas are rather redundant when it comes to airliners travelling between 230-180knots
I really hope that you will consider this very rash statement and re word it.

Firstly, I do not understand the comparison between aircraft under IFR and VFR. Fast jet traffic often does operate under VFR and light aircraft often operate under IFR - the physics of the aircraft are no different, its the management of the different rules that is the issue.

See and be seen is the final safety protection in ANY type of flying and to dismiss it as being 'rather redundant' in airliners is extremely worrying, since it questions exactly what understanding you have of airmanship.

There have been many incidents over the past years where crashes have been avoided by airline pilots seeing and avoiding.

If you had said 'more challenging when flying an instrument approach' if I would have agreed with you, but' rather redundant' is way off mark.



Your right to play is, rightly, of lesser importance.
Really.

Last edited by Final 3 Greens; 8th Jul 2003 at 18:32.
 
Old 8th Jul 2003, 18:34
  #30 (permalink)  
 
Join Date: Jan 2001
Location: I sell sea shells by the sea shore
Posts: 856
Likes: 0
Received 0 Likes on 0 Posts
Final....

You might well regard being non SSR equipped grounds for a refusal to enter Class D. Many of those who have raised this issue (access to Class D) are of a very different opinion.

The Reason I said non SSR equipped was to make the point that TCAS does not "see" non equipped a/c, making the task of the hypothetical B737 crew MUCH more difficult.

BUT.... just supposing the CUB has a transponder with mode C, it wanders into path of the B737 and a TCAS RA is triggered. A go- around is flown, safely, but at some expense to the PAYING Airline. This type of event could well occur regularly if unfettered access to given to all VFR flights.... end result? Demands from the PAYING airlines to turn the CTR into class A with virtually NO ACCESS to GA.

I repeat. CTRs ain't big. ATC will grant access when it is safe to do so and having taken into account all airspace users needs. Please note : It may not be safe to grant you access and the safer option FOR YOU may well be to spend perhaps 5 minutes more routing around the CTR. Or is a 5 minute saving worth the risk? Not in my, or any ATCOs, book

Rgds BEX
BEXIL160 is offline  
Old 8th Jul 2003, 18:38
  #31 (permalink)  
 
Join Date: Sep 2002
Location: uk
Posts: 38
Likes: 0
Received 0 Likes on 0 Posts
Grrr

Final 3 Greens... how many moons are circulating your planet?
Where is it in the universe? Have u ever been to Earth?

Now, I am being childish, I know, but really: what do u expect when u seem to imply that light aircraft operating in a final approach area is simply "more challenging" for all concerned?!!!

As a passenger on a train would u be happy with children playing on the track ahead?

My points were an attempt to promote understanding. ATC objectives, roles, responsibilities etc can be difficult to convey it seems.




PS And yes I do try to accommodate non SSR a/c as much as any other. Any request for CAS transit should be accommodated subject workload, which is subject to traffic levels and complexity, equipment and airspace limitations. Any deviation of track or refusal is for good cause. This is not a game we r playing.

Last edited by Eggs Petition; 8th Jul 2003 at 18:56.
Eggs Petition is offline  
Old 8th Jul 2003, 19:27
  #32 (permalink)  
Final 3 Greens
Guest
 
Posts: n/a
Bex

The Reason I said non SSR equipped was to make the point that TCAS does not "see" non equipped a/c, making the task of the hypothetical B737 crew MUCH more difficult.
I'm well aware of this and also the possibility for spurious TA/RA - for this reason I am always very careful to go to standby on the ground at airports and also to use the transponder appropriately at other times.

If you can fit non transponder traffic in your airspace safely that's fine (I'll bow to your knowledge/judgement), but whilst monitoring Essex (formerly Stansted), they regularly decline non transponder a/c and I can't argue with their logic (once telephoned them , asked politely why and had a full and reasonable explanation from an ATCo pleased that a GA pilot had called in.)

[QUOTE]Your point[QUOTE]

Please note : It may not be safe to grant you access and the safer option FOR YOU may well be to spend perhaps 5 minutes more routing around the CTR. Or is a 5 minute saving worth the risk?

[QUOTE]My point in earlier mail[QUOTE]

personally I try to avoid class D as part of that deal, using it rarely and appreciating the benefits it gives all involved



Eggs

Now, I am being childish, I know, but really: what do u expect when u seem to imply that light aircraft operating in a final approach area is simply "more challenging" for all concerned?!!!
Err - well that's not what I said actually, but now you say it, it is done safely in many areas, but LAX was the best example I experienced.

And you still haven't grasped my airmanship point, so I'll assume that you are a terranian, to quote a suitable memory from my childhood as you seem still to be in yours
 
Old 8th Jul 2003, 19:43
  #33 (permalink)  
 
Join Date: Jan 2001
Location: I sell sea shells by the sea shore
Posts: 856
Likes: 0
Received 0 Likes on 0 Posts
Perhaps a more useful question to be posed would be:

How many GA VFR pilots really are seriously disadvantaged by not being able to transit class D whenenver they wish ?

As I have said, and so far many pilots seem to agree, including Final etc, routing around Class D is not a major issue as they are quite small pieces of airspace in avation terms.

Is there REALLY an issue here? Are the MAJORITY of pilots upset? Or is it the minority with a chip on their shoulder about ATC making a big noise?

I wonder......

Rgds BEX
BEXIL160 is offline  
Old 8th Jul 2003, 20:14
  #34 (permalink)  
 
Join Date: Sep 2002
Location: uk
Posts: 38
Likes: 0
Received 0 Likes on 0 Posts
Final, let's not start to cast aspersions about airmanship...

As u said SEE+BE SEEN is the FINAL safety protection. There are one or two other measures that should, in CAS, be reasonably taken beforehand!

Regardless of flight rules the physics of a/c ARE very different indeed. A large jet will be travelling faster and be less manoeuverable than the usual GA type a/c. Obvious?!?

A large pax carrying jet should not in my humble opinion have to worry about the continual possibilty of having to take avoiding action. The self loading freight may not be too happy about playing russian roulette any more than the professional driver!

What may seem like a large chunk of CAS to u in a Cherokee, appears far too small to accommodate modern (faster, larger) aircraft and traffic levels from my earthbound view in front of a Radar display.
Eggs Petition is offline  
Old 8th Jul 2003, 20:29
  #35 (permalink)  
 
Join Date: Apr 2001
Location: Adrift upon the tides of fate
Posts: 1,840
Likes: 0
Received 0 Likes on 0 Posts
Am I correct in gleaning from this thread that VFR aircraft require 'clearance' to operate in your class D? If so, aren't you in fact operating the airspace as another class? Why not reclassify it as such?
ferris is offline  
Old 8th Jul 2003, 21:29
  #36 (permalink)  
 
Join Date: Sep 2002
Location: uk
Posts: 38
Likes: 0
Received 0 Likes on 0 Posts
Ferris:

Class D airspace:

Flight Rules: IFR + VFR

A/C Requirements: ATC clearance before entry. Comply with ATC instructions.

Were u thinking of Class E in which VFR flights do not require clearance?

There is no class E in UK airspace, or at least none that I know of. We could be viewed to have a slightly different mindset here in the UK in that we think in terms of "contolled" and "uncontrolled" airspace. Class E is not "controlled" from our perspective in that it is not a "controlled" environment, VFR being able to fly through at will. Here, outside of our airways,TMAs, CTAs and CTRs we generally have class G up to FL245.

Hope the sun is shining out there for u. The wx here has a different mindset too!
Eggs Petition is offline  
Old 8th Jul 2003, 21:54
  #37 (permalink)  
Final 3 Greens
Guest
 
Posts: n/a
Eggs

Firstly, I do not understand the comparison between aircraft under IFR and VFR. Fast jet traffic often does operate under VFR and light aircraft often operate under IFR - the physics of the aircraft are no different, its the management of the different rules that is the issue.
i.e. the physics of the aircraft type do not change depending on the flight rules - obviously the physics of different aircraft are different.

A large pax carrying jet should not in my humble opinion have to worry about the continual possibilty of having to take avoiding action
Now I begin to wonder which planet you come from, since this possibility is all around us, e.g.

- airliners operating under RAS in open FIR between CAS
- 'turbulence commanded' level changes
- gliders crossing airways out of radar or radio contact
- TCAS incidents
- hot air balloons not painting and popping up in CAS
- human errors (e.g. private flights infringing without clearance, level busts)

etc etc etc

I would hope that the crew of any airliner carrying me were VERY alert to the continual possibility of taking avoiding action, even though it rarely happens.

See and avoid may be the last protection in the sequence, but to dismiss it as 'largely redundant' as you did is a very dangerous mindset to get into.

As an example, there are two engines or more on airliners and they are very reliable, so why bother learning the skills to deal with a shutdown, when the statistics prove that it is largely redundant?

Some issues are absolute, not relative and the skill of maintaing a good look out falls into the former category - it is far from being redundant.

A large jet will be travelling faster and be less manoeuverable than the usual GA type a/c. Obvious?!?
Maybe, maybe not. What is the roll rate of a Fokker 100 compared with a 172 or PA28 .... ask a F100 driver - I was amazed at the answer. Also a jet has much higher vertical manoeuverability.

NB: a PA28RT or PA32RT will be cruising around the approach speed of many airliners. I have cruised versions both types at around 140kias.

So whilst I understand the thrust of your point and agree that we should not throw airliners all over the sky and scare the pax, you are over simplifying.

Last edited by Final 3 Greens; 8th Jul 2003 at 22:12.
 
Old 8th Jul 2003, 22:25
  #38 (permalink)  
 
Join Date: Sep 2002
Location: uk
Posts: 38
Likes: 0
Received 0 Likes on 0 Posts
Oh dear Finals.

My point was not that the pilots of scheduled/charter airlines (most of whom I think u will find ARE flying IFR ) should not look out of the window, rather that it should not be the prime method of ensuring that there are no lumps of metal in front/below/above of them. Not a wholly unreasonable view?

RAS to IFR is a minefield of liability to ATCOs and ATS providers. CAS D (or A)is there for a reason. We wish to provide a safe operating environment. If that means, unfortunately, a GA a/c can't have exactly what he/she wants: so be it. It is in the interests of safety.

We do try our best.
Eggs Petition is offline  
Old 8th Jul 2003, 22:48
  #39 (permalink)  
 
Join Date: May 2000
Location: Scotland
Posts: 264
Likes: 0
Received 0 Likes on 0 Posts
A couple of corrections to the above posts:

Eggs....Class E airspace indeed exists n the UK, mainly in the big chunk of Scottish TMA around Glasgow and Edinburgh airports. (Belfast also have some).If you read the latest book of Airprox investigations, you'll see one involving a 737 and a microlight in Class E. See and be seen indeed, although this isn't always appreciated by IFR crews travelling at 250kt.

And to the PPLs who feel VRF and IFR could be integrated even closer: I am aware of several Airprox reports filed by IFR crews who felt that VFR traffic had got far too close, when in fact the VFR was visual and safely avoiding - either due to TCAS or crew interpretation, "safe separation" depends on which plane you're sitting in....
NudgingSteel is offline  
Old 8th Jul 2003, 23:15
  #40 (permalink)  
Final 3 Greens
Guest
 
Posts: n/a
Nugding Steel

I agree with your point and GA pilots need to understand how it looks from the other side.

One of the reasons I stay away from 'big iron' comes from the experience of a radio conversation between me, Socal approach and a United 727 over LA... (something like this, can't remember the exact words, it's a few years ago)

Socal "United XXX you have Arrow traffic opposite direction, 4 miles out of 2700' for 4000'."

United XXX "United looking"

Socal "Arrow XXX you have a 727 opposite direction 4 miles, out of 9000' descending for 6000'"

F3G "Arrow XXX looking"

F3G "Arrow XX visual"

United XXX (sounding slightly concerned) "United still looking"

Socal "United XXX, traffic now at 2 miles"

Socal "Arrow XXX traffic now 2 miles"

United XXX (now sounding worried) "United not visual, still looking"

F3G "Arrow XXX visual"

United XXX (now sounding very worried "United still not in visual contact"

F3G "727 traffic now passing well overhead"

United XXX "Thank the lordy for that, guess you guys can see a 727 against the sky better than we can see a Cherokee down below"

"safe separation" depends on which plane you're sitting in
Felt okay for me, doubt it felt great for the United crew.

However, the old system of the VFR corridor over LAX always seemed to work really well, since traffic types were not mixed and everyone knew where they stood.
 


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.