Lastly, there was a demonstration of seakeeping qualities and hull strength by making a run at maximum sustained speed in the open ocean. Accelerometers were installed in the pilot house of each design to record "pounding". Conducted 24 July 1941, this open-water trial, at full throttle, would forever after be referred to by PT personnel as the "Plywood Derby." The course started from the mouth of New London Harbor, to Sarah Ledge, then led around the eastern end of Block Island, then around Fire Island Lightship, finishing at Montauk Point Whistling Buoy.