A watertender is a crewman aboard a steam-powered ship who is responsible for tending to the fires and boilers in the ship's engine room. In the United States Navy, "watertender" (abbreviated WT) was a petty officer rating which existed from 1884 to 1948. Watertenders held a paygrade equivalent to today's petty officer first class. A chief watertender (CWT) paygrade was established in 1903. In 1921, the lower paygrade was split into watertender first class (WT1 or WT1c) and watertender second class (WT2 or WT2c). Another lower paygrade, watertender third class (WT3 or WT3c), was established in 1943. The watertender and boilermaker ratings were merged into a new "boilerman" rating in 1948, which merged into "machinist's mate" in 1996.