During the early 1950s, the company officially renamed itself "Okanagan Helicopters Ltd." By the end of 1952, it had become the largest commercial helicopter operator in North America and one of the largest in the world. Throughout much of the 1950s, Okanagan participated in the construction and maintenance of the Mid-Canada Line of radar stations, using a mixed fleet of Sikorsky S-55 and Bell 47s. By the end of 1958, the firm was operating a fleet of 51 rotorcraft at various locations all across Canada. In the 1960s, Okanagan continued to grow into new locations and new markets, retaining a heavy focus on remote construction projects. During 1963, it received its first overseas contract from East Pakistan, which it met via a single Bell 47J.