TUI Cruises is a 50:50 joint venture, based in Hamburg, between TUI AG and Royal Caribbean Cruises. The business was founded in 2008 and operates in the premium volume segment. There are seven vessels in the fleet: Mein Schiff was launched in May 2009, followed in 2011 by Mein Schiff 2. Mein Schiff 3 has been plying the waves since May 2014, and was joined by the fourth sister ship in June 2015. Mein Schiff 5 was commissioned in July 2016. Mein Schiff 6 joined the fleet in May 2017. In spring 2018 the new Mein Schiff 1 was launched. The previous Mein Schiff 1 vessel was transfered to Marella Cruises’ fleet as Marella Explorer. In 2019, the new Mein Schiff 2 was added to the TUI Cruises fleet. Mein Schiff 7 is scheduled for delivery in 2023.