Flight at the transition level or above, an aircraft shall carry out QNE procedures and the vertical plane is expressed in terms of "Flight Levels". This is a standard procedure. Flight below the transition level differs slightly. For flight below the transition level in the aerodrome area (control zone); Aircraft position in the vertical plane shall be assigned by ATC as a height, and reported by a flight crew in values using meters based upon the QFE procedures. For flight below the transition level but, outside the aerodrome area (control zone);
Aircraft position in the vertical plane shall be assigned by ATC as an altitude, and reported by a flight crew in values using meters based upon the QNH procedures. Specific lost radio communication flight levels have also been established. Flight levels 4250 (FL140), 4550 (FL150) or 7300 (FL240), 7600 (FL250) depending on the flight direction shall be considered as specially established flight levels for flights without radio communication. During an emergency, pilots may request that vertical assignments be made feet and to be assigned an altitude that is equal to the meters normally used by Russian ATC.
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