Meters vs Feet
Hello all,
I was wondering if anybody here knew the answer to this. When flying in countries that use Meters instead of feet for altitudes, is it required to have your altimeter reading in meters? For example if I have a digital altimeter that shows feet normally and I can change it to meters by pushing a button, am I required change it to meters or can I keep it in feet and use a conversion chart to find what level ATC wants me to fly? Also what publication would I look in to find the answer to that?
Thanks!