Questions tagged [flight-level]
Altitudes above the transition altitude, where the altimeter is set to the standard pressure, and is expressed as the letters "FL" followed by the indicated altitude in hundreds of feet, e.g., FL380.
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What is meant by altitude correction above Transition level?
I am a system engineer dealing with Thales ATC product. In my system there is a server called sensor data processor, one of its function is to receive QNH data to do altitude correction. I can't ...
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how to determine the optimum FL for A320 to make a flight plan?
I want to make an ifr flight plan for A320 based on fcom, but I don't understand how to make one
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Why do airliners over south-west Europe cruise at flight levels with inversed numbers?
Over North America and Europe, usually when airliners go east (heading 0-179) they cruise at a flight level with an odd number (e.g. FL370) and when going west (180-359) they cruise at an even number (...
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In the International Standard Atmosphere/ICAO, what is geometric and what is geopotential altitude?
Read first before you start considering it a duplicate, please, as the similar questions didn't answer my question either.
The usual standard atmospheres have two altitudes: the geopotential and the ...
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What are those flight level values on an airway?
I have downloaded from this link the chart of available airways over the Canary Islands. There, in some of the airways, it says
FL660
FL145
As far as I know, ...
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Why are planes required to cruise at round flight levels only above 18000 ft of altitude?
AFAIK, planes flying at up to FL180 (18,000 ft pressure altitude) are allowed to fly at both round and semi-round altitudes (e.g. 15,000 ft or 15,500 ft). Planes flying above FL180 must fly at a round ...
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What do these double Class Bravo airspace floor and ceiling limits mean?
While browsing SkyVector I came across these double Class B airspace limits within the same section (is that what you call it?). I'm wondering what it means and what the difference is between this and ...
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How is Altitude/QNH defined state when passing transition altitude?
Let's say an airplane is climbing towards transition altitude (TA = 5000 ft), and it has it's altimeter set to QNH = 1030 hPa. ...
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What is transition altitude?
Now I know the definition of transition altitude - it's the altitude where pilots change their barometric altimeter datum from regional pressure setting to 1013.2hPa. In USA the TA is 18,000ft. But I ...
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Is there a difference between altitude and flight level? [duplicate]
I came across a question in Quora asking the difference between altitude and flight level. One of the answers said that anything above the transition altitude is referred to as a flight level. So ...
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Semi-circular rule for choosing a FL: Risk of head on collision with borderline headings (179, 359)?
If it happens that you fly a 179/359 heading in uncontrolled airspace, what's the risk of collision with aircraft flying in opposite direction?
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How is the quadrantal rule applied to VFR flights in Hungary?
I'm looking for a clear explanation for this quadrantal rule question (it applies to Hungary):
A VFR pilot is cruising, en-route in level flight, above the transition level of FL035. His magnetic ...
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How does the nose of a plane self adjust down [duplicate]
I am not a Flat Earther. I understand that the plane's trim, speed and atmospheric pressure determine the plane's altitude. As the plane moves forward the Earth does indeed curve out from under it and ...
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Do pilots have a generally preferred "traffic" resolution?
For aircraft cruising along at altitude, it is common for the controller to assign an aircraft a new course or altitude or speed for some reason such as "for traffic". My question is, would most ...
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Does it help to climb in case of a partial engine failure?
When the engines of a airplane show irregularities that do not reduce performance but indicate a possible failure of the engines, is it useful to climb to a higher level, to increase the glide length ...
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Why do some countries separate a transition level and a transition altitude?
The US airway system uses a single transition level (or altitude), but some other countries like China separate a transtion altitude and a transition level with the transition layer in between.
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How does changing the altimeter setting in the US and elsewhere compare?
I have been trying to track down an answer to this question and I stumbled upon this website. Apologies if this answer is already out there. I have seen the FAR regulation, 14 CFR 91.121 - Altimeter ...
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Can different departure procedures have different transition altitudes at the same aerodrome?
Is it possible for operations and ATC to have different departures procedures with different transition altitudes at a single aerodrome? For example:
SID RWY11 with a transition altitude of 2,000 ...
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What are the climb rates during the different phases of flight of an A320?
I have read about common climb rates for an A320. It is said that the initial climb rate for an A320 is between 15-20° and it differs depending on the weight and also the altitude.
I therefore have ...
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Does density altitude affect actual altitude?
Student pilot here, working on my first rating. A lot has been drilled into my head about density altitude as we approach the hot summer months here in the northern hemisphere, and how it causes the ...
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How does one calculate true altitude?
"An aircraft is cruising at FL170. The altitude shown with QNH set is 17,500 feet. The OAT is -10 deg C. What is the true altitude?"
The ISA temperature deviation is 9°C.
My calculation is:
17,500'
...
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How does vertical separation work above FL400?
The information mentioned in "Jeppesen Airway Manual" is that after FL400, fight levels are FL430, FL470, FL510 for the 'even' FL's column.
Normally, I would expect every level divided by a thousand ...
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Why airliners fly so high even when winds are more suitable at a lower altitude? [duplicate]
While playing a flight sim, I noticed West winds were very strong at levels >FL350 and weaker around FL270 above the US.
I took a look at Flight Radar 24 to see at which level actual airliners were ...
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Is altitude information included in filed flight plan?
When the dispatcher produces and files the flight plan for a scheduled flight with ATC, are the determined optimal cruise altitudes part of the flight plan, or does the flight plan only contain ...
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Does ATC direct flights to fly eastbound at odd levels and westbound at even ones?
Do commercial airlines routinely travel at altitudes specified by the ATC based on the direction they are heading? Example: eastbound flights travel at odd levels and westbound flights travel at even ...
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Where can I find the transition altitude in different countries/regions? [closed]
Where can I find the transition altitude in different countries or regions?
Hoping to cover as many places as possible. Links to the applicable regulations would be nice.
See also:
What is the ...
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What is the difference between "flight level" and "altitude"?
I have seen references to "FL180" and "FL300", and I know that they stand for Flight Level 180 and Flight Level 300. I've also seen references to "an altitude of 18000ft" or "an altitude of 30000ft".
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Why are many jet aircraft designed to cruise around FL350-370?
If the flight distance permits, the B737-800 will cruise at FL350, the A320 a little bit higher...
Flying at FL370. Photo: Live from the Flight Deck by GolfCharlie232 (reframed)
Elements such as ...
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Flight Level Change or Vertical Speed - When to use it?
I've heard that some pilots have this difficulty to determine the correct use of both features. So, which is the difference between using the vertical speed, instead using the flight level change ...
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Where can I find regulations in different countries for flight level rules based on direction of flight?
I'm from Brazil, and here we use the West/East rule, so we use an odd flight level when we fly between 0/360 - 179, and when we fly between ...
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