The 1 passenger runabout had a short production run that ended in 2007. Sea-Doo’s 3D-DI was a versatile craft that allowed its pilot to ride standing up or sitting down. Appearance-wise, it looked a cross between a stand-up and a runabout. It more closely resembled a stand-up, but it was more than 100 pounds heavier and a foot longer. In its first production year (2005) it featured a 782cc 2-stroke engine, but it was changed to a 951cc 4-stroke a year later.