Here are a couple of Kodak Gold 200 snaps I took back in 1999/2000 with the Minolta Maxxum 7000 and excellent Minolta AF 35-70mm F/4 lens while on a trip to northern Michigan.
The two Ore carriers (Taconite) above were leaving the 'Soo' locks at the same time; you could hear the big throaty growl of the engines winding up, and see the churning water from the spinning props behind them. It looks like the Mesabi Miner pulls a hole shot on the Fred R White Jr, both now hitting about 1 mph! Unfortunately, we didn't have enough time to linger and see who won the race to the St Mary's river, and Lake Superior. I'm guessing it took around 5 or 10 minutes to clear the locks...