The Cummins six-cyliner in-line marine diesel is a common engine on commercial fishing boats from Seattles classic long line halibut schooners to Gulf of Mexico Shrimpers. In southern California the 85 by 24 ft Royal Star, a sport fishing boat out of San Diego, has run up a lot of hours on a pair of these engines. Extended fishing trips have routinely taken the Royal Star well into Mexican waters and, on occasion further south in Central America. The boat was built by Ted Dunn on a Poole hull into which he incorporated many of his design concepts.