Bamberg. It is also in charge of the Federal Police Sport School in Bad Endorf and a competitive sport project in Kienbaum near Berlin. The sport school specialises in winter sport events and has trained many of Germany's top skiers and skaters such as Claudia Pechstein. The Zentrale Direktion Bundesbereitschaftspolizei controls the mobile support and rapid reaction battalions located in Bayreuth, Deggendorf, Blumberg (near Berlin), Hünfeld, Uelzen, Duderstadt, Sankt Augustin, Bad Bergzabern, Bad Düben and Ratzeburg. The number of Bereitschaftspolizei companies increased in March 2008 from 28 to 29 comprising approx. 25 percent of Germany's police support units. BPOL Special Units The following special units also exist: The BPOL Aviation Group is subordinate to the Bundespolizei Direktion 11 (BPOLD 11) in Berlin. It controls the five aviation squadrons around the country that operate the force's helicopters. These are located in Fuhlendorf (north, with satellite airfield in Gifhorn), Blumberg (east), Fuldatal (centre), Oberschleißheim (south) and Sankt Augustin (west). Its duties include; border surveillance, monitoring installations belonging to German Rail, helping in serious accidents and disasters in Germany and abroad, searching for missing persons, searching for criminals on the run, supporting the police forces of the federal states, providing transportation for persons whose security is endangered, providing transportation for guests of the Federal government, supporting federal and state authorities, and providing air search and rescue services in coordination with the 12 air rescue centers throughout Germany. The BFE+ units (abbreviated from Securing of Evidence and Arrest of Suspects) are a specialized division of regular BPOL arresting units. These units were organized after the 2015 Charlie Hebdo attacks in France with the aim of responding faster and with higher firepower to massive terrorist attacks. BFE+ units are decentralized and work as a first response force until the more specialized and centralized GSG9 arrive at the scene, and are equipped similarly to SEK units. The GSG 9 counter-terrorism group is directly subordinate to the BPOL HQ. The BPOL Information and Communications Center is now a department of the BPOL HQ in Potsdam. Most special units of the Federal Police are subordinate to the unified command of Federal Police Directorate 11. The water police stations with 16 patrol craft and helicopters are part of the German Federal Coast Guard and assigned to coastal BPOL stations. The watercraft include six offshore patrol vessels, e.g. those of the Bad Bramstedt class, and the large Potsdam class as