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Aircraft general knowledge

8.12.6.2 Transition altitude

For practical and safety reasons, it has been decided that if you fly above a

certain altitude, the transition altitude, you set the standard value of 1013 on

the altimeter.

Thus, all aircraft above a certain altitude are flying with the same altimeter

setting.

When flying above the transition altitude and with the standard value, you fly in

levels.

For VFR flights, levels 45, 65, 85, etc. are used when flying west. When flying

east, 35, 55, 75, etc. are used. These levels are called FL (Flight Levels).

For example, FL 35, with 1013 printed, corresponds to a reading of 3500 feet.

8.12.6.3 Practical use of the altimeter

We want to fly a trip. From the control tower we are given a QNH. We set the

altimeter to this.

We check with the map of the airfield that our altimeter now also shows

correctly (max. permissible deviation is 60 feet).

When we pass the “transition altitude” during climb, we set the altimeter to the

standard value 1013 and fly in Flight Levels.

Upon arrival at the destination, we are given the QNH of this location, and when

we pass the “transition level” during descent, this value is set on the altimeter.

When landing, the altimeter should then show the altitude of the destination in

relation to MSL.

Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© marts 2026 773