MS Zuiderdam /'za?d?rdæm/ is a Vista class cruise ship owned and operated by Holland America Line (HAL). It is the lead ship of the Vista class vessels, so named for the extensive use of glass in their superstructure, and is sister to three other HAL ships, Oosterdam, Westerdam, and Noordam. The prefixes of the four ships' names represent the four directions of the compass in Dutch.