FL195 over the North Sea. Estonia In Estonia, airspace is divided into only classes C, D and G. Class C is used for enroute airspace, between FL095 and FL 660. Class D is used for the Ämari CTR, and Tartu TMA and CTR, during operational hours. Class G is used below FL095, in the Kuressaare, Pärnu, and Kärdla FIZs, and Tartu TMA & CTR, outside of operational hours. Germany In Germany, Classes A and B are not used at all. Airspace is divided into lower airspace below FL 245 and upper airspace above FL 245. Class A is not used. Class B is not used. Class C is used for controlled zones above and around airports and for airspace above FL 100 (or FL 130 near the Alps) up to FL 660. Class D is used for controlled zones, or above and around airspace Class C designated zones where CVFR is not necessary. Class E is used for airspace between usually AGL (around airports or AGL) and FL 100. Class F is not used. Class G is used below AGL (around airports below AGL, then rises via a step at to AGL). IFR flights in Class G are not allowed in Germany except for arrivals and departures in Radio Mandatory Zones (RMZ) around uncontrolled airfields with IFR procedures. Iraq In Iraq, the Flight Information Regions (FIR) is known as Baghdad FIR. It is classified into Class A, D, E and G airspace. Class B, C and F airspace are not used in the Baghdad FIR. Air traffic services are provided in all controlled airspace, by the controlling ATC Unit, based on an ATS Surveillance System (supplemented by procedural non-ATS Surveillance System procedures) or MRU where authorized based on Procedural (non- ATC Surveillance System) procedures and supplemented by ATC Surveillance System where possible. Class A is established from FL235 – FL460 throughout the whole Baghdad FIR. Class B is not used. Class C is not used. Class D is established in conjunction with airports that have operating control towers. Class E is established at Baghdad, Basrah, Kirkuk, and Mosul TMAs. Class E airspace is also established along the air route structure. Class F is not used. Class G is established for all areas that are not classified as A, D or E. This airspace is primarily used by military VFR aircraft. A Common Traffic Advisory Frequency (CTAF) is established for aircraft