Jon Hall, Huckins’ chief designer, was also there, recording that day’s performance figures. At 17 knots, the diesels were sipping 17.6 gph, roughly a gallon a mile, a tribute to the light, strong construction techniques at the heart of every Huckins yacht. At this speed, the 415-gallon tankage produces a prodigious 351-nautical-mile cruising range with a 10 percent fuel reserve. Consumption climbed to 27.8 gph at 24 knots, and again to 33 gph at 28 knots. When Purcell pushed the throttles to their stops, the 45 SF was doing 35 knots and burning 50.5 gph.