The EC135 P2 has been in production at Eurocopter since 2002. It is regarded as the most cost-effective and quietest helicopter in its class. In 2011, the Franco-German Company delivered its 1000th EC135 to the ADAC. With 49 of its own escue and Intensive-Care Helicopters, 180 employees and 37 Air Rescue Stations at daily readiness the ADAC Air Rescue Service Ltd is the largest air rescue organization in Germany. By the end of 2012, the ADAC had undertaken approximately 690,000 operational sorties. The ADAC works together with more than 700 Flying Doctors and 260 HEMS crew members. In the first half of 2013, the Yellow Angel of the Skies took off some 25,500 times and helped approximately 23,000 people. Fitted with the new Particle Filter System IBF (Inlet Barrier Filter), EC135 P2 D-HBYF, has been in service with the ADAC Air Rescue Service since March 2011.