In 1978, a wide body McDonnell Douglas DC-10-30 (which was chosen over the Boeing 747-200) was purchased to succeed the Boeing 707s on the longer-haul routes, although the 707s stayed in service into the 1980s on ad hoc charters and as scheduled-flight replacement aircraft. The purchase of a DC-10-30 wide-body aircraft was followed several years later by the purchase of a medium-range aircraft