The Crown corporation that runs the ferry service between southern Newfoundland and Nova Scotia has temporarily pulled a vessel out of service.
Marine Atlantic says the MV Leif Ericson has a broken rudder.
Passengers with reservations for Wednesday and Thursday have been given alternate bookings.
"In the next 36 hours, the Leif Ericson would have made two round trips, so we're going to add another sailing, a new sailing of the MV Caribou and that sailing will accommodate the traffic that we would have had to carry," communications director Tara Laing said Wednesday.
The Leif Ericson— which has had operating problems in the past, including an October 2006 incident in which it lost power while docking in Port aux Basques— is expected to be back in service on Friday.