One of these years, I would like to follow a ship from it's port of origin to it's destination. I've figured that ships are slow enough and cars are fast enough that it would be possible to do this. The only issue that I might have is going to sleep as these journeys typically take a day or more. The closest I've come to doing this was when I followed the Edson up the Detroit River. The second closest was one of the times I followed the Blough on the Detroit River.