Game changing maritime inventions. Read about the days of ships propelled by sail, oars, coal or oil, paddle wheelers, steam engines, or warships like dreadnought, submarines, aircraft carriers, or torpedoes, propellers, chronometers, sextants, etc. [Proposed by Janos Posfai]

For more info, please contact Sam Colbourn at scoulbourn1@verizon.net.