How do you find transition altitude as a controller?

Sorry if this isn’t the category, but I would like to know something when controlling. How do you find out the Transition altitude? Do you set it to what altitude seems the best for you (the controller) or is there any information on it somewhere. I couldn’t find anything else on this topic so I had to ask forums :/


This is a great question @SirBinary - I would love to know the answer myself!


As taught by @art_martinez,

The airspace that ATC is responsible is ground level to 5,000 feet. If a plane is requesting transition and you want to avoid a mid air collision, you want to clear transition around 4,000 feet so that they have 500 ft to 1,000 feet of height separation from the planes in the pattern.


Brilliant @quantasVirtual and that goes for all airports regardless?


Thank you.


Yep, all airports!

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Thank you man


Not necessarily 4,000 feet. As Art mentioned, you want that kind of separation between planes, but the normal pattern altitude would be 1,000-1,500 feet AGL for aircraft operating patterns in the airspace. Just be sure to watch how high they are and adjust appropriately. It isn’t wrong, but just something to keep in mind.


I’m also confused if transitions are approved at or above or at or below. I hear both a lot and it confuses me.

Please keep in mind these are not real world altitudes. This is something we implemented within Infinite Flight a while ago to simplify things UNTIL the airspace class system could be revamped.


You never hear at or below. That’s not a possible command.

Transition altitude is by definition the lowest altitude at which you may pass through the airspace.

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In Infinite Flight.


Also, I’d like to point out the AGL that Josh mentions. AGL. AGL. AGL. Above ground level. NOT MSL, which is what’s used in air traffic communication. Please keep this in mind


Applies to ATC as well.


I haven’t seen the answer come through yet on where to find this information. Tyler mentioned in the YouTube tutorial that we just click on the airport and the airspace info shows up in the top right corner of the map…but it definitely doesn’t on my iPhone 6+. I also read that the airspace info isn’t accurate in real life so no use googling it. Could someone kindly explain?

Also I’ve noticed the in the tutorials that the rings on the ATC map shows the heading degrees, but I don’t see heading info outside the rings…are this issues because I’m using a phone instead of a tablet?

Last question, I promise, but say my airspace is a wired number like spc----2800ft, and a transition is requested, an I supposed to round down and clear at 2000ft? (I got this question wrong on the written lol).

Thanks for the help!

IF used to display the altitudes for the airspace of each ‘ring’ but they don’t anymore. That tutorial must be outdated now.

As a rule, IFATC has stated that the ceiling of the towers airspace is just a blanket 5000 feet AGL. That means, aircraft only need to request a transition if they are at, or below, 5000 feet AGL when transitioning through the airspace. In the same fashion, tower only needs to approve it at or below 5000 feet AGL.

Aircraft don’t need to request above 5000 feet AGL, and tower doesn’t need to ‘on-guard’ them.


So, what is correct answer to the pilot who request transition from 160000 ft?
Check tutorial…? Or Freq.change…L

Heading degrees on ATC map was there before Aug’16 update.

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I do check tutorials followed by frequency change if they request transition when above FL100 (unless I notice plane is on descend).

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I believe you must request a transistion if your 5000 feet and below is what I think I heard