The Kwuna will miss two sailings Sunday evening (June 22), the 10 pm from Alliford Bay and the 10:30 pm from Skidegate Landing.
The cancellations are required to do some repair work, replacing one drive leg on the vessel. The work will continue overnight.
The Kwuna is expected to be back in service for the 7:00 am sailing from Alliford Bay.
"We thank our customers for your patience and apologize for any inconvenience that may occur while this necessary maintenance is completed", BC Ferries says.