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Royal Caribbean International's Harmony of the Seas, featuring Wartsila engines, propulsion equipment, exhaust scrubber systems, Wartsila NACOS Platinum navigation and dynamic positioning systems, as well as various electrical and automation solutions, is now in commercial operation.

The Harmony of the Seas has also been included in a service agreement between Wartsila and Royal Caribbean covering technical management and monitoring under Wartsila Genius services.

The ship was delivered from the yard on May 12. With a length of 362 metres the ship, which was built at the STX France shipyard in the French port of Saint-Nazaire, is the world's largest cruise vessel.

Wartsila has also provided the engines and thrusters to the vessel's sister ships, the Oasis of the Seas and the Allure of the Seas.

"Wartsila congratulates both Royal Caribbean and STX France on this milestone delivery of the world's largest cruise ship. We are proud to have been selected to provide a comprehensive scope of Wartsila solutions and we wish good luck and success for the vessel throughout its lifecycle," said Fred Danska, Director, Cruise Business, Wartsila Marine Solutions.

The Harmony of the Seas is powered by four 12-cylinder Wartsila 46F engines and two 16-cylinder Wartsila 46F engines, featuring "best-in-class fuel economy, and outstanding power-to-weight and power-to-space ratios," according to the Finland-based engine provider. For effective manoeuvring, the ship has four Wartsila CT3500 transverse thrusters.

The two Wartsila hybrid scrubber systems represent the world's biggest marine exhaust scrubber installation so far. They feature the latest in exhaust cleaning technology, thus minimising sulphur oxide (SOx) emissions and allowing the vessel to comply with emission control regulations around the world. Wartsila hybrid scrubber system solutions have the flexibility to operate in both open and closed loop using seawater to remove SOx from the exhaust.

Image: The world's largest cruise ship, Harmony of the Seas.