While a tugboat goes about its work, pulling other ships around, you might notice it spraying water in large arcs. Why is it only tugboats that do this?

Wakeboarders are also in for a treat. The Carver is perfect for lakes that prohibit gas-powered boats. Cut across calm waters with ease. The jet propulsion will thrust you forward. But how?

His latest creation is a racing paddle boat, but its performance left [Ivan] with a need for speed. Cue the development of the 3D printed water jet engine (YouTube link, embedded below).