Numerous ships, numerous times, and for varying amounts of time.
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I do have a basic understanding of the difference between a boat and a ship, but I don’t understand how a ferry is a ship. I always thought a ferry is a boat but there were a few answers her calling a ferry a ship so I don’t know what’s what. I still think a ferry is a boat. At least the ones in my area are more a boat than a ship… I think lol.