highspeed below 10,000ft?
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highspeed below 10,000ft?
recently I've heard that highspeed below 10,000ft approved doesn't mean can exceed 250kts. it only means cancel restricions less than 250kts on the SID etc.
and ATC controllers don't have rights for approve speed more than 250kts as well. quiet a new concept for me.
please share you guys ideas about this.
many thanks!
and ATC controllers don't have rights for approve speed more than 250kts as well. quiet a new concept for me.
please share you guys ideas about this.
many thanks!
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In the US there are no waivers for 250 KIAS below 10,000', except for the statutory allowance for climb performance (91.117(d)), and specific waivers for air shows and other special operations (91.117(a)). ATC cannot approve or direct any speed above 250 KIAS in cruise or arrival.
There may be different rules in other countries...
There may be different rules in other countries...
Last edited by Intruder; 6th Jul 2013 at 18:38.
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Surely the rule for a max speed of 250 kts refers to flights operating outside CAS? The principle of "See and Avoid" in the open FIR works on this premise.
If a controller can still provide separation inside CAS, my understanding is that he may approve a higher IAS.
If a controller can still provide separation inside CAS, my understanding is that he may approve a higher IAS.
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ShyTorque
That's more or less correct for the UK. ATC can't approve high speed below FL100 in Class E, F, or G airspace, but they can in Class D or above.
That's more or less correct for the UK. ATC can't approve high speed below FL100 in Class E, F, or G airspace, but they can in Class D or above.
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Not forgetting that ATC cannot over-ride company rules or other limits, so in fact, regardless of 'class of airspace', they are or should be saying:
"No ATC speed restriction".
"No ATC speed restriction".
Or if ATC want high speed to make their sequencing work they can ask for it. If your SOPs allow you to accept high speed below 10000' to fit in with ATC requests then job done.
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If you are at FL110 doing for arguments sake 320kts and the controller clears you to FL80 and asks you to keep up the speed (and you readback wilco) do you think they are expecting you to slow to 250kts as you pass through FL100? You took the clearance and will stuff up their plan royally if you start slowing down. When you need to slow down you tell them.
Its the same with idiots that come off the track system and roll back the mach no. without any clearance from the controller.
Its the same with idiots that come off the track system and roll back the mach no. without any clearance from the controller.
I think high speed means 250kts. I learnt this once over 30 years ago when I went across the Manchester zone and was asked to keep the speed up, apparently he meant 250 Kts rather than the 500+ I gave him! Fortunately my boss thought it was quite funny.
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I think high speed means 250kts.
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If a controller asks me to maintain high speed or to keep up the speed i will reduce to 250kts below FL100, it is too unspecific for anything else. Mind you, 250kts is the ECON descend speeds these days with a CI of 10. If a controller asks for a specific speed i will keep it if it is within company regulations (300kts below Fl100, 250kts below 5000ft).
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My understanding is that "no ATC speed restrictions" means just that. You can fly any speed you want or are allowed to do under you SOP.
"Maintain high speed" is very ambiguous and could mean anything. Pretty much means carry on with what you are dong now IMO.
"Maintain high speed" is very ambiguous and could mean anything. Pretty much means carry on with what you are dong now IMO.
I'm with Lord Spandex on this one!
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How, in the English language, can 'maintain high speed' mean reduce to 250kts below FL100.
