Given the back and forth we've had in the hull thread, I don't know that I'd consider the hull lines representative of the actual thickness at *any* particular point.
The deck plans and cutaways and such were never really meant to represent real-world construction schematics. The Illustrator line weights were chosen from an artistic standpoint only. Most everything I did in the deck plans was intended as an item locator, more like icons on a general diagram. I'd have to be paid a ton more money to make sure that an NN pt line actually measured out to some real number of feet or meters.