the altemeter
Airspeed Indicator.
If you are in an airplane, they can be very high with you!
It all depends on the airplane,passenger jets go around 35k feet high.
An airplane with an engine of more than 200 horsepower.
A high-performance airplane is an airplane with an engine of more than 200 horsepower. For example, a standard Cessna 172 is not a high performance airplane. A Cessna 182 generally is. An extra endorsement by a flight instructor is required before a pilot is legally authorized to fly such an airplane. Here it is in FAA Legalese: (1) Except as provided in paragraph (f)(2) of this section, no person may act as pilot in command of a high-performance airplane (an airplane with an engine of more than 200 horsepower), unless the person has-- (i) Received and logged ground and flight training from an authorized instructor in a high-performance airplane, or in a flight simulator or flight training device that is representative of a high-performance airplane, and has been found proficient in the operation and systems of the airplane; and (ii) Received a one-time endorsement in the pilot's logbook from an authorized instructor who certifies the person is proficient to operate a high-performance airplane.
The operating costs are very high for an airplane are very high. It may cost 30K to a Million dollars per month. It depends on the plane.
About 4.2 miles.
If the question is about how high the airplane is in the atmosphere, I would think that an altimeter would be an answer to consider.
You get where you want to go faster
12 feet
13,000 ft.
the answer is 300 to 600 feet