Waterbus.

I was taking pics. of a heron when a nearby window cleaner (brush and pole in hand) started asking me various photography questions. It turned out he was a knowledgeable photographer, having gained a recent exam pass. He also gave me advice on indoor photography lighting units. Unfortunately I missed the heron taking off (the shot I was after) so walked into town for this inverted bus reflection.
Which bus sailed the ocean?
Christopher Columbus. (I still have leftover Xmas crackers.)