During the 1960s, public interest in novel sports offered new market potential. Alert to novel trends, OMC entered the snowmobile industry with enthusiasm, introducing the Evinrude Skeeter and the Johnson Skee-Horse in 1964, each sure to thrill riders with speeds of more than 30 miles per hour. Another innovation was the Evinrude Aquanaut for skin diving, also sold under the Johnson tradename Air-Buoy. Consisting of a floating gasoline-powered compressor, the unit supplied air to two masked divers at the same time. Another breakthrough was the loop-charged outboard, devised after the company went back to powerboat racing for the first time since World War II.