1975, British Airtours commenced transatlantic Advance Booking Charter (ABC) flights to the United States. Over the coming years, British Airtours acquired additional Boeing 707s which British Airways had inherited from BOAC. In June 1982, British Airtours launched twice-weekly scheduled services between Gatwick and Newark using Boeing 707s in an all-economy configuration. However, the airline's foray into the transatlantic scheduled market ended after only seven months in early January 1983. When British Airways decided in the late-1970s to replace the aging and increasingly inefficient short-/medium-haul Hawker Siddeley Tridents and BAC One-Elevens which it had inherited from BEA with Boeing 737s and 757s, a follow-on order for nine brand-new 737-236 Advanced aircraft was placed with Boeing. These aircraft, which were delivered to British Airtours' Gatwick base during the early 1980s, allowed it to replace all of its old, second-hand narrow-bodied planes with brand-new equipment, thereby considerably enhancing its competitiveness vis-à-vis its independent rivals. During 1984, British Airtours took delivery of a Rolls-Royce RB211-powered Boeing 747-236Bs at Gatwick, its first and only brand-new widebodied aircraft. This aircraft was put into service on the airline's popular, long-haul ABC flights to North America. The same year, British Airtours' last Boeing 707 made its final revenue flight. In the meantime, British Airtours also began taking delivery of a small number of former British Airways Lockheed L-1011 Tristar widebodies, which initially supplemented its narrow-bodied 737 fleet on the busier and more popular routes. In 1985, British Airtours introduced a new livery that closely resembled the one used by British Airways at the time (designed by Landor Associates). Rebranding and later activity In April 1988, British Airtours adopted the popular Caledonian Airways brand when the newly privatised British Airways had completed the takeover of its former Gatwick-based rival British Caledonian. As an additional measure to signify the change, the airline also adopted a modified Caledonian livery which had been adapted from the contemporary, Landor Associates-designed British Airways livery. The newly rebranded Caledonian Airways transferred its Gatwick operation from the airport's South Terminal into the then brand-new North Terminal, thereby concentrating the majority of the British Airways group's Gatwick services within the new terminal. Shortly thereafter, Caledonian Airways commenced the replacement of its Boeing 737 narrow-bodies with additional ex-British Airways L-1011 Tristar widebodies as well as with a number of brand-new Boeing 757s sourced from the large 757 orders placed by its parent company. The former British Airtours 737s