The 1970s was a period of transformation for Okanagan. Only Bent remained on staff by this point as both Agar and Stringer had resigned during the 1960s over disputes on how the company ought to be run. Okanagan embarked on a spree of acquisitions, purchasing companies such as Universal Helicopters, Haida Helicopters, Lac Saint-Jean Aviation, Dominion-Pegasus Helicopters, Sept-Iles Helicopter Services, Associated Helicopters and Bow Helicopter. By 1975, 20 percent of the company’s revenue came from international sources; a dedicated international division was established to manage this business sector. Furthermore, as a result of the turboshaft engine having displaced the piston engine on newer and more capable helicopters, Okanagan began to introduce turbine-powered rotorcraft into its fleet, including the Bell 204, Bell 212, Sikorsky S-58T, Sikorsky S-62, and Sikorsky S-76.