2009 Sea Doo/Bombardier GTX Limited iS 255, 2009 See-Doo GTX Limited iS - Not just the best in 2009. The best ever. The GTX Limited iS 255, equipped with iControl, the world's most advanced watercraft system, interactive gauges, a high performance Variable Trim System, three-up riding and touring seat, will turn countless heads. Of course, with an authoritative 255 horsepower Rotax 4-TEC engine under the dashing exterior, this PWC will be nothing but a blur anyway.