If a flight is made from an area of low pressure into an area of high pressure without the altimeter setting being adjusted, the altimeter will indicate
higher than the actual altitude above sea level.
Except when necessary for takeoff or landing, what is the minimum safe altitude for a pilot to operate an aircraft?
An altitude of 500 feet above the highest obstacle within a horizontal radius of 1,000 feet.
What is true altitude?
The vertical distance of the aircraft above sea level.