The set-up depends on the DP class of the ship.

Also, in World War II, the engine room needed about a dozen sailors to work the many engines, however, today, only about 4-5 are needed (depending on the class of the ship).

The class of the ship is named after a town of Thomaston, Maine, which was the home of General Henry Knox, the first Secretary of War to serve under the United States Constitution.