ATPL Exams: Discussing A Recent Altimetry Question

[@andytamlyn]

In my opinion this is by far the best explanation of this type of question and the PIT approach standardises the process and minimises the opportunity for confusion. Excellent!!!👍

[@bristolgroundschool]

Glad it was helpful!

[@ALIPLAYS412]

great work!

[@Kilgurt]

Excellent! Thank you!

[@manjithadiasabeyesinghe6533]

Hey there - really useful video no doubt , but I am a little confused because of the RVSM because the question says (what is the minimum FL at which the aircraft may fly in RVSM airspace and doesn’t that make the answer FL310 since we are above FL290 and as per the table shown on the video)

[@bristolgroundschool]

In order to clear the 25700 ft obstacle with 2000ft in these conditions, the altimeter in the aircraft would have to be reading at least 29316ft with 1013 hPa set in the Kollsman window. With this in mind, the next available IFR flight level above 29316ft is FL300. Since the aircraft is flying west, it will need to pick an even flight level, so FL300 remains a good option. If the aircraft was not in RVSM airspace, the separation between opposite-direction traffic would be a minimum of 2000ft between opposite direction traffic, beginning from FL290. This means that in non-RVSM airspace the first even flight level would be FL310. However, in our scenario, the aircraft is in RVSM airspace (where the spacing between opposite-direction traffic is reduced to 1000ft up to FL410) and is therefore able to utilise FL300.

[@JamesBellinger-Brown]

Really useful lesson! Thanks

[@Peterahonsifitness]

i found this helpful

[@bonnystarks]

looks wrong to me... 27700ft is the TRUE ALTITUDE not the INDICATED ALTITUDE.