Government Flying Service provides short and long range search and rescue services, police support, medical evacuation and general purpose flights for the Government. Passenger facilities Despite its size, the passenger terminal was designed for convenience. The layout and signage, moving walkways and the automated people mover help passengers move through the building. The HKIA Automated People Mover, a driverless people mover system with 3 stations transports passengers between the check-in area and the gates. The trains travel at . The airport also contains an IMAX theatre that has the largest screen in Hong Kong. The theatre is located in Terminal 2, level 6 and can seat 350 persons at a time. Hong Kong Business Aviation Centre The Hong Kong Business Aviation Centre (HKBAC) is located within the airport and has its own terminal and facilities separate from the public terminal. It provides services for executive aircraft and passengers, including a passenger lounge, private rooms and showers, business centre facilities, ground handling, baggage handling, fuelling, security, customs and flight planning. Designated spaces and hangars are also provided at the HKBAC for private aircraft. HKBAC has broken ground on a HK$400 million ($51 million) expansion. The project, which will double the airport's handling capacity for business jet movements, is expected to be completed in 2025. Intermodal transportation hub To sustain the growth of passengers, the Airport Authority formulated a "push and pull through" strategy to expand its connections to new sources of passengers and cargo. This means adapting the network to the rapidly growing markets in China and in particular to the Pearl River Delta region (PRD). In 2003, a new Airport-Mainland Coach Station opened. The coach station has a waiting lounge and sheltered bays for ten coaches. Many buses operate each day to transport passengers between HKIA and major cities in the Mainland. The Coach Station was relocated to the ground floor (level 3) of Terminal 2 in 2007. The 36 bays at the new Coach Station allow cross-border coaches to make 320 trips a day carrying passengers between the airport and 90 cities and towns in the PRD. Local tour and hotel coaches also operate from T2. The coach station at T2 has shops and waiting lounges as well as a mainland coach service centre which gathers all operators together. In late September 2003, the SkyPier high-speed ferry terminal opened. Passengers arriving at the SkyPier board buses to the terminal