Plagued by mechanical problems, the Island Queen ferry canceled all of its crossings for three days this week. 

The ferry service, which provides seasonal passenger trips between Oak Bluffs and Falmouth, told customers in an alert Tuesday that they could take certain Steamship Authority ferries from Oak Bluffs to Woods Hole, and then take a free shuttle bus to the Island Queen parking lot on Falmouth Heights Road.

“Please look for a member of our crew with an Island Queen sign who will assist you,” the company wrote.

The following day, Island Queen said it would also have to cancel all of its ferries on Wednesday and Thursday because of the ongoing mechanical issue. 

A representative at the ferry line said Wednesday morning that no one was immediately available to talk about the mechanical problems. 

Passengers can change their reservations and Island Queen officials said they planned to automatically cancel and refund all day-trip passenger tickets for people departing and returning on the same day. 

The Island Queen runs between seven and eight round trips a day in the summer.

The current Island Queen ferry was launched in 1974 and this year marks its 50th birthday. The diesel-powered steel ferry runs 125-feet long, much shorter than any of the Steamship Authority ferries that sail on the Vineyard route.