Two quick questions for you ATCO's.

[spoilers yellow]

After some clarification on a couple of questions, thanks in advance.

1.which of the following is correct RT?

a. climb to 4000 feet, QNH 1015
b. descend to altitude 4000f eet, QNH 999
c. climb to flight level 230.

2. under a RA sevice, FL90 am i right in thinking that the max speed is 250kts?

3. ( for you LHR chaps), is N1 and N3 Rw27L considered NOT to be an intersection for wake seperation purposes?

4. finally, A319 following B757 into LHR, nice day, what is the minimum spacing required on approach?

Thanks.:confused:

[Gonzo]

1 - b (if you add the word 'millibars' on the end!)

2 - I'll leave that to the experts!

3 - N3 is not considered a vortex intersection. ie. if you depart from N3 in a medium, you can go 2 minutes behind a heavy who departed from the full length. (same with N8 and N10 on 09R)

4 - A319 (lower medium) requires 4 miles behind a B757 (upper medium).

[spoilers yellow]

Thanks very much for the quick reply, appreciate that.:ok:

[rodan]

1. In the UK, none are correct. They should be:

a) Climb to altitude 4000 feet, QNH 1015.
b) Descend to altitude 4000 feet, QNH 999 millibars.
c) Climb flight level 230. (No 'to')

2. The rules of the air require aircraft to observe a speed limit of 250kt IAS below FL100.

The limit does not apply to:

a) Flights in class A and B airspace.
b) IFR in class C
c) Flights in class C & D when authorised by ATC.
d) Test flights iaw specified conditions
e) Flying displays authorised by CAA
f) A/c subject to written permission from CAA
g) A/c not subject to ANO (eg. military)

So, in your example, the limit is applicable.


3 & 4 left for those in the know.


Edit: Beaten to it!

[bekolblockage]

Millibars? Is it not hectopascals now?

[rodan]

In ICAO-land, maybe.

Here in the UK we still use milky-bars.

[bekolblockage]

Oh I forgot. Pascal was French. ;)

[2 sheds]

"None IS correct" - "none" is singular.

(Ducks to avoid inevitable incoming from anti-grammar police)

[ifleeplanes]

Hate to differ but in Class D/E airspace below FL100 the speed limit of 250kts is manditory there is no ATC disgression, (unless your military of course :) )

[Pierre Argh]

Thinks, what is the plural of none then... nuns?

[BALIX]

Oh I forgot. Pascal was French

As opposed to Millie Barr, the well known Scottish meteorologist. :E

[rodan]

Hate to differ but in Class D/E airspace below FL100 the speed limit of 250kts is manditory there is no ATC disgression
Assuming we are talking about the UK here, (the reference to 'RA service' and questions about EGLL ops imply a UK perspective), then you are incorrect.

In the UK, the restriction may be lifted in Class D at the discretion of ATC. My answer was drawn from the UK Manual of Air Traffic Services.


"None IS correct" - "none" is singular.
Quite right, I hang my head.

[chiglet]

(unless your military of course )......errrrm should that be
"unless you're military, of course"? :rolleyes:
watp,iktch

[ifleeplanes]

OK Rodan Im sorry, the CAA document I took it from must be wrong then. It seemed logical to me since in D only separation provided is between IFR/IFR.

[Spuds McKenzie]

Climb to altitude 4000 feet
Why do you have to add "altitude"in the UK?
What could "4000 ft" be mistaken for?

Bit like a black crow or a wooden tree.

[Gonzo]

Climb to four thousand feet.

Climb two four thousand feet.

[ukatco_535]

Spuds...

Here at TC, we quite often get our bretheren from across the pond replying to a call of climb FL130 with "climb 0ne three thousand"... etc etc

if you were to say "climb to 4000 feet"; would they maybe take that as clearance to climb to FL240??

I know it should be obvious, but when you normally fly in a country with a transition altitude 2 or 3 times higher than in the UK, I suppose it can be confusing. (Can't believe I typed something that could infer a defence of the Yankee pilots!!)

Beaten to the punch by Gonzo....

[Pierre Argh]

... climb to (height) 4000ft...

UK Military ATS Units predominatly pass instructions on QFE (although currently standard phraseology does NOT allow for the use of either height or altitude... IMHO wrongly?)

[stag1]

Spuds mckenzie, I hope you are not a controller!!! What could altitude be confused with?? height perhaps?? some a/c operators still use qfe.