who did the romans learn the technology of shipbuilding from
Roman navy The Roman navy (Latin: Classis, lit. "fleet") comprised the naval forces of the Ancient Roman state. The navy was instrumental in the Roman conquest of the Mediterranean basin, but it never enjoyed the prestige of the Roman legions. Throughout their history, the Romans remained a primarily land-based people and relied partially on their more nautically inclined subjects, such as the Greeks and the Egyptians, to build their ships. Because of that, the navy was never completely embraced by the Roman state, and deemed somewhat "un-Roman".[1]
John Ericsson John Ericsson (born Johan) (July 31, 1803 – March 8, 1889) was a Swedish-American inventor, active in England and the United States, and regarded as one of the most influential mechanical engineers ever. Ericsson collaborated on the design of the steam locomotive Novelty, which competed in the Rainhill Trials on the Liverpool and Manchester Railway, won by George Stephenson's Rocket. In America he designed the US Navy's first screw-propelled steam-frigate USS Princeton, in partnership with Captain Robert Stockton, who unjustly blamed him for a fatal accident. A new partnership with Cornelius H. DeLamater of the DeLamater Iron Works in New York resulted in the first armoured ship with a rotating turret, the USS Monitor, which dramatically saved the US naval blockading squadron from destruction by an ironclad Confederate vessel, CSS Virginia, at Hampton Roads in March 1862.