Thursday, April 19, 2018
The official boat schedule site that is kept up to date by the Visitor Center staff is harborlookout.com -- duluthboats.com is still around and has lots of good information and history including longer-range and special boat schedules.
So keep both bookmarked for your reference.
Note also that this is a "work in progress" with lots of kinks to work out. timing should get better as time goes on.
Also, I am not the one who operates and manages it, so, I look forward to refinement just like you.