The ship is expected back in Australia this evening four days early.
The technical malfunction became apparent while sailing to New Caledonia.
Initial work to fix it there while in port was unsuccessful.
The ship returns to Sydney and the following cruise has been cancelled.
“Brilliance of the Seas is experiencing a technical issue resulting in sailing at a much slower speed. Unfortunately, we are no longer able to make our scheduled calls for the remainder of the cruise,” it told guests onboard the ship.
These guests have been told they will receive a 50% refund and a 50% future cruise credit.
The next scheduled cruise on 30 March to Tasmania has been cancelled and booked guests will receive a full refund and reimbursement for extra travel costs where appropriate.
“We understand that this change impacts your cruise holiday, and we’re truly sorry,” the cruise line said.
Tags: Royal Caribbean, South Pacific, Australia, Brilliance of the Seas