A turtleback forecastle was to be fitted. The small "turtleback" behind the sail was the exhaust piping of the auxiliary diesel generator. This design would be used for all follow-on turtleback ships under the 30-knot specification. The ships had turtleback forecastles and two funnels. White's design featured a flush deck and a turtleback forecastle. The S class had a trawler-like bow with a more sharply sheered and turtleback forecastle. Eads adopted a turtleback deck design that promised to only draw . An arched turtleback forecastle was to be fitted. This required a dorsal turtleback fairing over the rear fuselage, to improve its lines. Fighting for the turtleback tombs is mentioned in the accounts of American soldiers as well. The ships featured a raised turtleback forecastle and two funnels. The ship had a turtleback forecastle and had two funnels. As such it (and later, the turtleback) was absent in later destroyers. Some of his designs include the "turtleback" greens, a Ross double plateau, and The Punchbowl.