I find the CalMac timetable confusing. I'm always reading the wrong time timetable, or looking at the Largs departure times. So I decided to make something..
https://ferry.cumbrae-benches.com
..and yes, I know that in the real world you never have to wait much more than a half hour for a ferry, and this has taken up a large chunk of my time when I should have been dealing with benches, but hey!
It also records when CalMac have reported issues on their website..
Enjoy! :)