LTH-Baas Completes Royal Caribbean Drydock Work on Two Ships
On Ovation of the Seas, LTH-Baas installed three thousand five hundred meters of ventilation ducting with as many as three hundred fifty specialists onboard.
LTH-Baas has completed two Royal Caribbean drydock assignments, adding 26 staterooms to Ovation of the Seas in Singapore and carrying out exhaust gas system work on Harmony of the Seas in Cadiz, Spain, the contractor said May 16. The projects combined guest-accommodation installation, HVAC modification and heavy technical repair across two large Royal Caribbean ships.
The assignments put Tallinn-based LTH-Baas on both guest-facing and technical scopes during Royal Caribbean’s 2026 Royal Amplified refurbishment cycle, which includes Ovation, Harmony and Liberty of the Seas after the program resumed with Allure of the Seas in 2025. Ovation is a 168,666 GT Quantum-class ship with 4,180 lower berths; Harmony is a 226,963 GT Oasis-class vessel with more than 5,400 double-occupancy capacity.
Cabins and HVAC work in Singapore
On Ovation of the Seas, LTH-Baas installed 26 guest cabins during the ship’s Singapore drydock. Six were suites on Deck 16. The contractor also carried out HVAC work across the 2016-built vessel, installing 3,500 meters of ventilation ducting.
The Ovation scope was organized around continuous shifts, with as many as 350 LTH-Baas specialists onboard. A significant share of materials and components was prefabricated ahead of installation, a method the company said was intended to reduce onboard work time during the drydock window.
Exhaust gas system repairs in Cadiz
On Harmony of the Seas, LTH-Baas worked on the ship’s exhaust gas system during its drydock at Navantia Shipyard in Cadiz. The scope covered replacement and repair of large-diameter exhaust lines, including DN1600 lines and DN1800 expansion bellows, along with tail pipes, cone and spool sections, silencers and related steel structures.
The contractor said the work required precision in prefabrication, lifting, welding and final installation because the exhaust system operates under heat and vibration loads. LTH-Baas coordinated more than 50 major crane lifts to move and install the pipe sections and other technical structures within the drydock period.
Harmony’s wider refit adds venues and cabins
The LTH-Baas exhaust work was part of a larger Royal Caribbean refit that also added passenger-facing venues and cabins before Harmony of the Seas’ Barcelona restart. The ship’s new or updated venues include The Lime & Coconut pool bar, El Loco Fresh, Samba Grill and Playmakers Sports Bar & Arcade, while the accommodation changes added about 100 staterooms, including panoramic suites over the bridge and inside cabins in areas previously used for conference space.
LTH-Baas dates to 1934 and employs more than 600 permanent marine professionals across retrofit, outfitting, repair and technical maintenance work. The scale of recent cruise drydocks has also increased coordination demands among contractors: Bolidt, which was separately involved in Harmony’s Royal Amplification flooring work, said larger refits are now being planned through multiple pre-work contractor meetings. Gerben Smit, Bolidt’s operations director, said operators increasingly want partners that “contribute beyond product delivery,” including support for “design, execution, and long-term performance.”
Harmony of the Seas is scheduled to spend the early summer on weeklong Western Mediterranean itineraries calling at Palma de Mallorca, Marseille, La Spezia, Civitavecchia and Naples. The ship is due back in North America in late July before beginning two- to seven-night Caribbean and Bahamas cruises from Port Canaveral in August.
