A "ferry timetable" refers to a schedule or list of times when ferries depart and arrive at specific locations. It tells you when and where you can catch a ferry, similar to a bus or train schedule. Full definition
He was very helpful in the organisation of my trip to Tioman from providing ferry timetables to making accommodation bookings which was much appreciated. (tioman-scuba.com)
To stay up to date with ferry timetables check out The Sorong Tourism Office, but be aware these times are just guides and delays / changes should be expected. (adventureinyou.com)
There's also a good map on the wall and an information board with the latest ferry timetables and so on. (travelfish.org)