 TMAC also operated a similar aircraft fleet consisting of the same aircraft types, including a pair of DC-8Fs.Therefore, combining both companies' businesses to achieve greater operational synergies as well as to attain greater economies of scale seemed to be the next "logical" step to ensure survival in a competitive market place dominated by bigger, more powerful rivals.IAS Cargo Airlines merged with TMAC on 15 August 1979 to create British Cargo Airlines, which began trading under its new name five days later.