A racing powerboat is due to appear in Grand Theft Auto VI, first cruising a river near the Leonida Penitentiary and later racing across the bay with two other boats in the first trailer, while a Whirlwind-liveried variant appears among many boats in an official screenshot. Its design appears influenced by the Skater 388.
Vehicle data via GTA Wiki (Fandom), CC BY-SA 3.0.