Altitude/Flight Level Assignments

An altitude/FL assignment is one of the required elements of an IFR clearance. The assignments are, of course, made with the purpose of helping you to keep all aircraft separated.

STANDARD CRUISING LEVELS

In Turkey between FL290 and FL410 RVSM levels apply
(All Flight Levels from base up to FL410 (inclusive) are 1,000Ft Separation. Above FL410, 2,000Ft Separation is used).

While transitioning to or from approach control, separating aircraft going the same direction, you will not always be following the rules as specified, you are free to issue non standard FL initially to help the flow of traffic but final levels must adhere to this rule. The direction of flight rules are intended for the en route phase of flight during normal circumstances.

How Altitudes & Flight Levels are Issued

• When an aircraft has to climb above the Airport (TA) Transition Altitude (displayed on the Airport charts), All Altitudes are called "Flight Levels" and the pilot will need to set their altimeter to the standard pressure 1013Mb QNE (A29.91) while passing the TA.
• When an aircraft is operating or has to descend below the Transition Level (if not displayed on the Airport charts, must be supplied on request; usually calculated by ATC), "Altitudes" are used and the altimeter of the aircraft has to be set to the Local QNH (Local Altimeter) Pressure.
• If the aircraft has to level off at or above the Transition Level, ATC will issue "Flight Levels".