One of the differences

At 3am, newly awakened by the alarm to set off on passage, Miles sat up to screw down the hatch in our cabin in case of waves/spray/rain.
"I've been thinking about how to make some kind of tool to make gripping these dials easier, you know?" he said. "Like something to rotate them when your hands are wet or cold, or if someone's done them up too tight. I'm thinking some kind of arm with a clamp on one end, but I haven't figured it out yet."
"Wow," I said, sitting up. "I never think about stuff like that. I just think, yay I did it, or bugger, I can't do it."

The Thinker improving the salt water pump