Comments by "SeanBZA" (@SeanBZA) on "Genius Design: How the Tugboat Was Invented" video.

Tugboats are basically massive engines with enough hull around them to store the fuel and make them float. Then you get deep sea tugs, which are the same, just they have enough fuel on board to get from one and of the ocean to the other, towing a ship many times bigger than itself. Crews are rough, and all are able to pretty much any task on board as well, simply because there is no room for more than the bare minimum of crew to sleep and live on it.
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