Speedy stunt boat to give thrill rides in U.P. Updated 12:43 PM; Today 12:43 PM Thunder Bay, Canada-based Sail Superior Adventures plans to bring its “Superior Rocket” speed boat to Sault Ste. Marie for thrill rides on the St. Mary’s River from Aug. 7-15. “Superior Rocket” is a 12-passenger rigid inflatable boat (RIB) that can get up to speeds of about 55 mph. It’s constructed of aluminum and ringed with a large inflatable tube.Published with the permission of Sail Superior Facebook Share SAULT STE. MARIE, MI – A company specializing in harbor tours on speedboats often used in action movie chases and stunts is about to test the waters in an Upper Peninsula tourism destination.