Good morning Forum,
Looking to see what North American based pilots due when flying in regions that give altimeter settings based on HPA.
Do you do the conversion and leave it in IN? or switch over to HPA?
Thanks!
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Hadn’t heard any responses so asked my (IRL) 7M8 pilot friend.
His response;
Hey dude. Happy new year to you too!
Sure thing, actually we switch to HPA from inches and leave it if the country or airport uses it. Typically it’s more accurate on inches but any approach expects you to use the local setting they provide and leave it. Plus if an accident happens the lawyers will say you didn’t use the local meter and pilot error kinda thing. Everything comes down to liability and the most obvious.
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Aircraft I used to fly displayed both inHg and HPa at the same time, it took 3 click on the BARO to change 1 HPa, inHg is indeed more precise.
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In the G1000 there is option to switch to hPa, not sure if this is simulated in MSFS tho.
Yes, I’m quite versed in how they work and the different features available.
My question was for those who fly in different regions where it switches from one to the other.
Do you leave it and do conversions or switch it.
I got my answer from a North American based Max pilot above.
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i usually leave it on inHG. Both because i’m lazy and there’s zero consequences if i screw up.
For jet aircraft it’s quite simple, you’ll take-off with inHg, above transition level you fly standard, then during descent you’ll receive the altimeter setting in hPa when cleared to an altitude, so you switch units.
Not sure how it would go when flying VFR below transition level from one region to another, never done that. But I assume that upon crossing the FIR boundary you receive further altimeter settings in hPa so you switch.
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