ATPL Tips - Altimetry 1; QNH, QFE, QNE & Pressure Altitude

This is the first video in a short series covering altimetry. This video looks at the different pressure settings available to pilots - and why we need them - and looks at the relationship between them.

Video two looks at Density Altitude and True Altitude, and shows you the method I use for True Altitude questions. Video three is a deeper look into more true altitude exam questions.

If you have any questions about any of this, or have ideas for future ATPL Tips videos, leave me a comment below!

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Creative Commons — Attribution 3.0 Unported — CC BY 3.0

[salah-deansharata]

I can not understand why there are 6 thumps down. The explanation is brilliant. The are always wierdos in this world ! A million thumps up

[MrCed]

Hi Tom. Not sure you will read this as you don't seem to be around here anymore, but wanted to thank you for sharing your knowledge/methods.
Passed my last ATPL exams today (gnav) and you helped a lot. Many Thanks🙏

[jcbmachify]

Extraordinary videos, very well explained, very good sketch's only one recommendation. The QNH calculated by QFE and not vice versa (QFE is the actual measurement of pressure in the airport and QNH is the reference of this pressure to the mean sea level - MSL)

[Johndoe-spzz]

Just excellent. way better than my ground school Instructors. way to go Tom!!

[guclutelli]

This is not just a thumb up. A well done, great job.

[ROTEMHE]

Hi Tom, your videos are by far the most helpful I've watched, thank you so much
I wish you had some filmed course I would definitely pay for it. no brainer.
thanks again!

[chrispatton]

awesome video! thank you for taking the time to put this together

[turboprop]

Hi Tom, you are simply wonderful !! thumbs up buddy !

[stevequao]

Good explanation. Am beginning to understand the subject matter. Thanks. Very helpful

[asr_lens]

Hey Tom . Thanks a lot for this video . I am preparing for CPL and this video just saved my life! keep producing such videos...thankyou!

[jamesleem.d.]

This is a good and carefully structured aviation teaching video. However, language is powerful and I believe that you forgot one crucial detail that is pedagogically not trivial in my opinion: It is vitally important to remind your listeners bluntly that both QNH and QFE are "altimeter settings" (specifically, pressure numbers we put into the Kolsman window). However, and I think this issue causes much confusion for any beginner, QNE is *NOT* a pressure number we input to the Kolsman window. QNE is an ALTITUDE. It is the altitude indicated on the instrument whenever the Kolsman window has been loaded with a very important but arbitrary value. Thus. . . . .QNE is the **Pressure Altitude** (as you mentioned in passing). If we set 29.92 (inches Hg) in the Kolsman window, the altitude shown by our altimeter is Pressure Altitude no matter where we are flying over Earth and no matter the local weather below on Earth or around us locally. Every pilot here in 'Murika must set 29.92 inches Hg in the Kolsman window before climbing above 17, 999 feet MSL.

[manusheunis]

Hi Tom. Thanks for a great vid and excellent explanation. I'm studying for my CPL(H) but your vid just did it for me, out of ALL the info I could find. Keep'em coming, please.

[harrybrady]

Thank you for this, has helped me out a great deal!

[ShrayanLahiri]

Very easy to understand tutorial ...Great job !!!

[GTheo.]

Hi my friend.. excellent work.One extra tip is to do QNH-1013 and not the opposite because when you find negative number it's more easy without drawing to understand that you must subtract.keep going the good work.
Greetings from Greece

[salaheddinemessif]

thanks a lot mate... you are doing a good job, keep up

[nats]

I think I need to point out that the word "Elev" shouldn't be level with the minus sign or else the result would give an erroneous and ridiculous number. That is, the division sign should be the one with the Elev above it. Just saying.

[paulcredmond]

Your videos are so good, seriously. Please make more :)

[SuperGilesfamily]

Nicely explained and very clear diagrams. I am going to follow through with your other videos on this subject and I HOPE that I will understand when to usre each or which to expect from atc. Nice one.

[rishiverma]

Thanks.. This was really helpful.. Very nicely explained.. 👍🏼