Berlin Tegel Airport Caledonian, Capitol International Airways, Overseas National Airways, Saturn Airways, Trans International Airlines, Transamerica Airlines and World Airways. During that period, the airport scene at Berlin Tegel could be very colourful, with Air France Caravelles, the UK independents' BAC One-Elevens, de Havilland Comets and Hawker Siddeley Tridents as well as the US supplementals' Boeing 707s, Convair Coronados and Douglas DC-8s congregating on its ramp. During 1974 alone, 22 airlines were operating at Tegel Airport. Construction of a new, hexagonally shaped terminal complex on the airport's south side began during the 1960s. This coincided with the lengthening of the runways to permit
Knox County Regional Airport operated by the City of Rockland until 1968. It was then turned over to Knox County and renamed "Knox County Regional Airport". Since that time, the airport has been developed, the runways expanded, and an Instrument Landing System (ILS) was installed. Knox County Regional Airport covers an area of 538 acres (218 ha) at an elevation of 56 feet (17 m) above mean sea level. It has two asphalt paved runways: 13/31 is 5,007 by 100 feet (1,526 x 30 m) and 3/21 is 4,000 by 100 feet (1,219 x 30 m). For the 12-month period ending July 31, 2010,