Its simple actually, when making a boat your able to craft it with more materials. For example, the normal recipe is 5 wood, the bottom row, and middle 2 corners, in this same shape you should be able to make boats out of iron, gold, and diamond. Each of these, will be faster then the one before it. Though maybe the wood in the middle row (2 corners) would stay in the recipe, and the bottom row would be the new item. Their would still be normal wooden boats too of course. What are you thoughts on this idea?
What do you mean?