The ships, which are due to be delivered in 2027 and 2028, will be modified to accommodate the use of green methanol as an alternative fuel source in the future.
However, additional modifications will be needed to fully enable the use of methanol in addition to traditional marine fuel on the ships.
The move comes as part of NCLH’s revamped climate action strategy, which sees the company target a reduction in greenhouse gas (GHG) intensity of 10% by 2026 and 25% by 2030.
NCLH has also recently tested small quantities of biodiesel blend B30, which is 70% marine gas oil and 30% biodiesel, in four of its ships to-date. By the end of 2023, NCLH anticipates more than 20% of its fleet will have tested and operated on biodiesel blends.
The company continues to invest in expanding shore power and expects to have approximately 60% of its fleet enabled to the use technology by the end of 2023 and approximately 70% by 2026.
"We recognise the need for corporations to take action to help address global challenges including climate change and sustainability," said Harry Sommer, president and chief executive-elect of NCLH.
"At Norwegian Cruise Line Holdings we are committed to doing our part by operating in a way that is socially responsible, respectful of the environment, and drives a positive impact on society."
