Depending on the route and the ferry company you're travelling with, you may find designated smoking areas on the outdoor decks. Smoking is not permitted in any indoor spaces, including lounges, dining areas, cabins, and restrooms.
To learn more about the ships for each ferry company, click here. Select the ferry company from the drop-down menu, and you'll find pictures of the ferries, information about the onboard facilities, and reviews from other passengers.