Ferry passengers face further disruption on Wednesday as the Brittany Ferries' flagship, the Pont-Aven, operates on an emergency timetable.
The £100m super-ferry carries 2,400 passengers and 650 cars
The ferry, which was due In Plymouth at 1100 BST on Tuesday, arrived more than seven hours late.
The company says it is being cautious and is not operating the vessel at its full speed after recent repairs.
The £100m ferry has been out of action for nearly two weeks after a cracked cooling valve was discovered.
The repairs to the Pont-Aven, which were carried out in Brest, took longer than expected when the valve problem caused 1,200 tonnes of seawater to flood the engine room.
The Brittany Ferries' German-built super-ferry came into service in March this year.
The 41,000-tonne ferry is capable of carrying 2,400 passengers and 650 cars.