This motoryacht is the next generation of the builder’s fiberglass planing range, and the SL78 runs well, reaching 29 knots with her twin 1,620 hp MTU 10V 2000 M96L diesels. This yacht looks fast, which makes sense, because she is fast. Plus she’s stable underway and at rest in a chop, thanks to CMC stabilizers. The builder put together what it calls the Raymarine Diamond Edition electronics package, covering everything from GPS and radar to thermal imaging and chirp technology, which makes the SL78 a fairly intuitive vessel to drive, either by wheel or joystick. Sanlorenzo of the Americas did a comprehensive job of Americanizing its Sag Harbor edition with redundant pumps and U.S. systems, keeping the boat familiar and operational.