Royal Caribbean International’s new cruise ship, Harmony of the Seas, which is currently under development at STX France shipyard, has conducted its first sea-trial from STX’s base in Saint-Nazaire, France.

Claimed to be the biggest cruise ship in the world, the Harmony of the Seas began its three day sea trial last Friday, with 500 people on board.

STX France said in a statement: "This first campaign will be dedicated mainly to her electric power plant and propulsion system tests, as well as to manoeuvrability tests."

The next sea trial for Harmony of the Seas is expected to be conducted before the end of next month.

The ship, which is the third being built in Royal Caribbean’s Oasis-class, has 227,000t capacity.

Said to be the sister-ship of Royal Caribbean’s Oasis of the Seas and Allure of the Seas, Harmony of the Seas can carry 1,700t more and accommodate around 100 more passengers at double occupancy than its sister ships.
Harmony is claimed to be able to carry more than 6,360 passengers, excluding the crew.

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The 361m-long and 66m-wide Harmony of the Seas is powered by three 20MW Wärtsilä 16V46 16-cylinder main generator diesel engines.

"This first campaign will be dedicated mainly to her electric power plant and propulsion system tests, as well as to manoeuvrability tests."

It will feature 2,747 staterooms carrying 5,479 guests at double occupancy.

The ship will feature a huge, multi-deck water slide area, a bionic bar where drinks are served by robot bartenders, the idea, which was first introduced in 2014 on Royal Caribbean’s Quantum of the Seas.

Equipped with larger cabins than Oasis and Allure in some groups, Harmony is expected to begin its first journey in May this year.

Following a preliminary round of cruise in the Mediterranean, the ship will move to Fort Lauderdale, Florida, US, to provide Eastern and Western Caribbean trips.

Image: Royal Caribbean’s Harmony of the Seas has 227,700t capacity. Photo: courtesy of STX France