tanks. The fire service also includes an operations control centre. This not only coordinates the airport's rescue services, but also alerts the fire brigades in the northern part of the canton. A total of 77 fire brigades are deployed from the Operations Control Centre, including 2 professional and 13 base fire brigades. Likewise, the rescue service Schutz und Rettung Zürich Nord, the rescue service Spital Bülach, the rescue service Winterthur and since April 1, 2008, the rescue service of the canton of Schaffhausen are also dispatched. Other tasks of the Operations Control Centre include alerting a large animal rescue service, a personal emergency call and location system and the coordination of the emergency medical service for several municipalities. In addition, 3800 fire alarm criteria are accumulated in the operations control centre. Every year, the operations control centre receives about 150,000 telephone calls. Until 31 December 2007, the airport fire brigade was officially called the Berufsfeuerwehr Flughafen Zürich (Professional Fire Brigade), and it was constituted as the company fire brigade of Flughafen Zürich AG. On 1 January 2008, the airport fire brigade, together with the rescue service and the operations control centre, was for organizational reasons transferred to the Schutz und Rettung (Protection and Rescue) department of the city of Zürich. The airport fire brigade records more than 1000 operations per year. In 2004, 260 of these involved incidents involving aircraft, including emergency or safety landings. Refuelling dispenser, Ramp Safety, Airport Authority and Follow Me Vehicles that not only cross taxiways and runways reserved for aircraft on the designated roads, but also use them for business purposes, must be equipped with a transponder and radio and can thus be tracked on tracking websites (e.g. Flightradar24). The transponder sign or radio name for the Follow-Me vehicles is Zebra. In 2014, five companies were licensed for aircraft refuelling at the airport, operating 16 tankers and 28 dispensers. Rescue service Zurich Airport The rescue service at Zurich Airport was established around 1982 as the original "fire-fighting ambulance". Its primary purpose was to protect fire-fighting personnel during fire-fighting operations, and secondarily to provide medical care for injured passengers. It was quickly recognised that there was also a steadily growing need for rescue services for the population outside the airport, and often neighbouring hospitals that were able to provide this service could not cope due to capacity bottlenecks, or the corresponding structures were not available in