We rode the tour boat through the MacArthur Lock at Sault Ste. Marie, going up twenty one feet from Lake Huron to Lake Superior. Coming down via the adjacent Poe Lock: the Paul R. Tregurtha at 1013 feet long and 105 feet wide. And the lock it is entering is only 110 feet wide.
Then it was back down through the smaller Canadian lock on the north side of the St. Mary's River.
As we locked down, I sent the Spud over to talk to the ship's officer. Trying to light some sort of career-track fire under him. Turned out the man was a retired Navy Recruiter who'd started out as a SEAL. (And after talking to him for a bit myself, I believe him.) He started talking about great jobs in the Navy, and that was enough to get Spud to make himself scarce in short order (sigh...). But the old sailor and I had a good chat for a while, proving again that it often pays to take the time to talk with random old-timers.
Once through the lock, we went downriver a bit, turned around, and caught the Tregurtha coming down with the grocery ship Ojibway alongside, transferring supplies while underway.