Using Safari, visit which ever version of the timetable you want to use:

At the bottom of the screen you'll see an icon like this , click on it.

A menu should pop up, and drag it a bit higher up, there should be an option to "Add to Home Screen" - click it

you might want to rename the link "ferry" or "bus", but either way, click on "Add" in the top right corner.

You've now got a shortcut to the timetable on your home screen!