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Mean Sea Level (MSL)
Technology / Aviation / Mean Sea Level (MSL): The average height of the surface of the sea for all stages of tide: used as a reference for elevations, and differentiated from AGL.

MSL. See mean sea level.
MTR. See military training route.
Multi-function display (MFD). Small screen (CRT or LCD) in an aircraft that can be used to display information to the pilot in numerous configurable ways.

MSL: Mean Sea Level. The average height of the world's oceans.
NDB: Non-Directional Beacon. A low frequency radio beacon that radiates it's signal in all directions.

MSL (Mean Sea Level)
The average height of the surface of the sea for all stafes of tide; used as a reference for elevations throughout the U.S
The rotational speed of the low-pressure compressor in a dual-spool gas turbine engine ...

MSL (Mean Sea Level) Altitude expressed as feet above sea level, rather than above local terrain (AGL). To ignore varying terrain elevations, all navigational altitudes and barometric altimeters are based on height above mean sea level.

MSL - Mean Sea Level. The average height of the surface of the sea for all stages of tide; used as a reference for elevations, and differentiated from AGL.

Mean sea level
Multi-mode radar (MMR).
A Multi-Mode Radar is used for Terrain Following (TF) and Terrain Avoidance (TA), Ground Mapping (GM) and Air-to Ground Ranging (AGR).

a. MSL Altitude- Altitude expressed in feet measured from mean sea level.
b. AGL Altitude- Altitude expressed in feet measured above ground level.

Mean Sea Level (MSL) →
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MSL: Mean Sea Level
MSN: Manufacturer Serial Number. Internal number, for the use of the manufacturer, identifying a particular aircraft within the same model.
MTOW Maximum Take-Off Weight ...

Current MSL altitude 8000'
Destination altitude 1000'
Difference is 7000'.

Mean Sea Level (MSL) Altitude
Altitude expressed in feet measured from mean sea level.
Maneuvering Area ...

See also MSL.
Amphibious Aircraft - a class of aircraft that can land both on land or water.
Ballistic Recovery System - A parachute attached to the airframe that, once deployed by the pilot, can lower the entire airframe to the ground.

above the airport elevation (charted in MSL) surrounding those airports that have an operational control tower, are serviced by a radar approach control, and have a certain number IFR operations or passenger enplanements.

Above Ground Level (AGL) A measurement of altitude above a specific land mass (also see MSL).

MSL: ≡ altitude above mean sea level, 12.3
MV: ≡ momentum vector, 8.8
magnetic north, 14.2.2
magneto, 15.1.1, 21.3
maneuvering , 16
maneuvering speed: See under airspeed, 2.13.2
margin: See safety margin, 12 ...

See also MSL.
ALPA : The Airline Pilot's Association. A union for professional pilots.
AOM : Aircraft Operating Manual. The airline I work for has this manual in two volumes.

Using the example above, the selected flight altitude of 3,500 feet MSL provides you with an approximate visibility of 10 miles due to a light haze. While enroute, you find yourself unable to determine your exact position. Climb to 5,500 feet MSL.

We leveled at 2,000 feet MSL and powered back to 24 squared, about 75% power, and let the airspeed build up. It reached about 130 mph indicated at a 10.4 gph fuel burn.

We were flying at about 7,000 MSL at this point. At the time, we estimated that the dust probably went up to 10,000 feet. We landed at Cochise at 11:30 for fuel, and were in the air again by 12:00.

What will come as even more of a shock is your first enroute takeoff from an airport that's at 3,500 feet MSL, which isn't even considered high by western standards.

The altimeter tells you your MSL (Mean Sea Level) altitude, your altitude above sea level, not AGL (Above Ground Level) altitude. The altimeter works by reading atmospheric pressure, which decreases as altitude increases and vice versa.

Acronym for Above Ground Level. A normal altimeter reads Mean Sea Level (MSL), a more realistic altitude measurement over land is the AGL. Most military aircraft have a "radar-altimeter" to determine their height above ground level.
Aileron ...

(Q-Code) for Air Pressure in hPa calculated to MSL
Quasi-Monopoly Government Organization ...

Most Class B airspace extends from the surface to 10,000 feet MSL with a circular diameter of 40 nautical miles.

An instrument which displays the altitude above mean sea level (MSL) of an aircraft.

According to the CFI, upon reaching 3000 feet MSL, the engine began to run rough and several loud noises were heard. The engine then lost all power, with zero oil pressure and rpm. Oil was visible on the windscreen.

Most of the time, light general aviation aircraft (C182, PA28, DR40...) are flown VFR. They often remain at low altitude (below 10.000 ft MSL).

See also: See also: Aircraft, Flight, Pilot, Altitude, Airport

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