Based on a John Deere tractor engine, the continuous-duty, fully electronic Lugger constantly meters the fuel, exhaust, and cooling and adjusts each accordingly for optimal fuel economy and efficiency. Luggers are a staple of the Ballard fishing fleet, where they're considered the absolute Cadillac of working engines. The term "constant or continuous duty" means that the engine can run all day, every day, at 135 horsepower, though in practice, the engine is employed at roughly 45 percent to 50 percent of its capacity. That means the engine can be operated at lower rpm than a normal sailboat auxiliary, which translates to better fuel economy over the long haul. In the Arctic, the engine was regularly run at 1,300 to 1,400 rpm, producing speeds of 7 to 8 knots.