Santorini (Thera) before the eruption of 1628 BCE. The reconstruction team thought they used flax
linen cloth in pine resin with limestone powder to make the hull white (a composite matrix) over a
wooden frame. The reinforcement is shown inside and out, if the hull is compromised on rocks, it will
delaminate, keeping the hull watertight to make landfall and repair, saving the crew, ship and cargo.
Glass fibre composites were invented in 1950’s COMMON ERA. Flax is almost as strong in tension.
https://www.quora.com/What-is-the-most-impressive-ancient-technology-that-has-ever-been-
created/answer/Nick-Deakin-4
Technologie beim Schiffsbau