No Academic Dares Tell the Truth
Nature provides varying resources in different parts of the world. In Ireland the use of leather in boat-building made sense. Leather craft going underwater led to glass or other submersibles to reach sunken ships in the time of Alexander and the designs some people think are alien craft on the Lascaux Caves are most likely leather submersibles. The hardwoods of Central and South America allowed for some truly fantastic big ships to be hollowed out of very large trees. Ironwood is heavier than concrete and it is even possible that they used concrete on ship hulls or to build ships with the geopolymerized technology that Pliny reports, and scholars did not understand, so the scholars failed to properly translate his writing. If 9,000 years ago the people of the Aleutians and the copper route were able to use ivory bearings in two or four man crafts that cut a catamaran type wake which Scientific American says exceeds our present technology, then you can imagine almost anything.
The use of copper sheeting on hulls and keels extended the life of wooden crafts in warm waters where boring beetles destroy any wooden craft. This allowed the Phoenicians or those who built ships that could travel the whole world a great advantage. They also had above deck windlass type technology to keep planked hulls intact during storms. These two things made larger ships more durable and feasible. The Murrhine vases for turning salt water potable would have been a huge advantage. It is not lost on me that the very name of these vases includes the name Mu just as Troy