3 ms·That's funny for someone with aero-glide2 as user name. I'm used to metric variometers in gliders.by bernulli 4y agoThat's funny for someone with aero-glide2 as user name. I'm used to metric variometers in gliders.chipsa 4y agoAnd yet, excepting two countries (IIRC), altitude is normally in feet for ATC. Which means instruments are in feet.bernulli 4y agoNot in the countries you refer to, and not in gliders in many European countries. Not 'everywhere' then.