A non-compound Skinner Uniflow remained in service until 2013 in the Great Lakes cement carrier SS St. Marys Challenger, installed when the vessel was repowered in 1950.
2011 ATP Challenger Tour | 2012 ATP Challenger Tour | 2013 ATP Challenger Tour | Space Shuttle Challenger | Space Shuttle Challenger disaster | St Marys, New South Wales | Glomar Challenger | ''Challenger'' | Space Shuttle ''Challenger'' | Challenger expedition | St. Marys | St Marys | St. Marys, Kansas | HMS Challenger | Dodge Challenger | St. Marys, Ontario | Mitsubishi Challenger | Challenger 1 | Bombardier Challenger 600 | 2009 ATP Challenger Tour | Vancouver Challenger (1993) | Vancouver Challenger | Union Pacific Challenger | The winner of South African Solar Challenge, "Tokai Challenger", Japan | The Three Marys | St. Marys Municipal Airport | SS St. Marys Challenger | Space Shuttle ''Challenger's'' | Space Shuttle ''Challenger'' accident | HMS Challenger (1902) |