Is altimeter set to MSL?
Is altimeter set to MSL? MSL Instruments If you use a different altimeter setting, your altimeter won't display your altitude above Mean Sea Level. For example, if you use the standard altimeter setting of 29.92, your altimeter no longer displays MSL, but rather an altitude based on a standard reference (29.92).
Why do pilots ask for altimeter?
“What is the purpose of the altimeter reading given to pilots by ATC?” That is the local barometric reading, so the pilots can adjust their altimeter to the same reading to show the correct and accurate altitude for the area at that time. That's very important for landing.
What does altimeter 29.92 mean?
When you set your altimeter to 29.92, you're flying at standard pressure altitude. This is the altitude of the aircraft above the standard datum plane, the theoretical location where at 15 degrees Celsius the altimeter setting will equal 29.92 inches of mercury.