# What does OML mean on a drawing?

## What is the true altitude?

True Altitude is height above mean sea level (MSL). It is primarily used in aircraft performance calculations and in high-altitude flight. • Density Altitude is formally defined as “pressure altitude corrected for nonstandard temperature variations.”

29.92 in

## What is the lowest usable flight level?

Aircraft are not normally assigned to fly at the “‘transition level’” as this would provide inadequate separation from traffic flying on QNH at the transition altitude. Instead, the lowest usable “‘flight level’” is the transition level plus 500 ft.

## What is the lowest altimeter setting?

The minimum safe altitude of a route is 19,000 feet MSL and the altimeter setting is reported between 29.92 and 29.43 “Hg, the lowest usable flight level will be 195, which is the flight level equivalent of 19,500 feet MSL (minimum altitude (TBL ENR 1.7-1) plus 500 feet).

## Why is 29.92 the standard altimeter setting?

Above 18,000 MSL pilots set the altimeters to 29.92. In this case, having all airplanes use a common altimeter setting is useful because it doesn’t require pilots to change it frequently as they pass through changes in pressure, and it also helps ATC ensure separation without having to inform flights of a new setting.

## What is the transition level?

The altitude at or below which the vertical position of an aircraft is controlled by reference to altitudes. Transition Level. The lowest flight level available for use above the transition altitude.

## What does Qne stand for?

QNE is an aeronautical code Q code. The term refers to the indicated altitude at the landing runway threshold when or. is set in the altimeter’s Kollsman window. In other words, it is the pressure altitude at the landing runway threshold.

## Where is Qfe used?

It is used in aerobatic competition. It is much safer and easier to read AGL altitude directly from the altimeter than to attempt to do the arithmetic immediately prior to performing a maneuver. I normally fly out of a field at an elevation of 1000′.

## What is QNH QFE and Qne?

Transition altitude (or transition height, when using QFE) is the altitude/height above which standard pressure (QNE) is set (29.92 inHg or 1013.2 mb/hPa). Transition level is the flight level below which QNH (local altimeter) or QFE is set. “Transition level” normally refers to a situation in which you are descending.

## How do you convert Qnh to Qfe?

Take the airfield elevation which in this example is 550 feet (for Popham airfield). You then find divide that elevation, by 30. Then, you take the 18 and take it away from the current QNH. That will give you your QFE.

## What is Qnh used for?

QNH is the barometric altimeter setting that causes an altimeter to read airfield elevation above mean sea level when on the airfield.

## What is a Qnh?

Regional or airfield pressure setting (QNH) is set when flying by reference to altitude above mean sea level below the transition level; Height. Altimeter pressure setting indicating height above airfield or touchdown (QFE) is set when approaching to land at airfield where this procedure is in use.

## How QNH is calculated?

Airfield QNH is obtained by correcting a measured QFE to sea level using ISA regardless of the temperature structure of the atmosphere. As your altimeter is calibrated using ISA, it will indicate altitude correctly at the airfield reference point.

## What is above aerodrome level?

In aviation, above aerodrome level (AAL), or above aerodrome elevation (AAE), denotes that an altitude is given above the nearest aerodrome or airport.

## What is MP in aviation?

MP. Mental Picture. Technology, Aircraft, Airway. Technology, Aircraft, Airway.

## What is the abbreviation for aircraft?

Abbreviation for Aircraft:

## What does OML mean on a drawing?

Orbiter Mold Line