Zach Varmitech uses a large grey yacht in many of his schemes over water. Built with a more angular design than Donita's yacht, Zach's is much more industrial for his schemes in animal robotics. The yacht is crew by a number of Zachbots while housing many rooms, including a captain's cabin and a deck outside, which occasionally has a pool.
Zach also uses a grey (or black) submarine in his deep sea plots, though while it has similar features to the yacht, the submarine is also equipped with periscopes and a hatchway for entry.