Around 1,000 passengers had to spend the night on board an Irish Ferries vessel in the French port of Cherbourg after the crossing to Rosslare was cancelled.
The Oscar Wilde ferry was due to leave the French port at 8pm yesterday evening, but a fault with its radar system meant the journey could not go ahead.
Some passengers have stayed in Cherbourg until repairs to the vessel are completed.
However, the majority decided to depart today on a variety of alternative sailings.
Tonight's sailing from Rosslare to Cherbourg has also been cancelled.
A spokesman said repairs on the vessel will not be completed until tomorrow.