A packet ship of the early 1800s. Of note is the way the sails on the mainmast are set backward, against the sails on the fore- and mizzen- masts. Known as "backing", this was how a square-rigged ship "put on the brakes" to slow or stop without actually furling the sails.
Wind power has been used by mankind for millennia. Almost every human culture has constructed sailing vessels of some kind, from crude log or reed rafts to the highly developed wind-jammers of the early twentieth century. Many of these vessels were the most complex and technologically advanced machines of their time - equivalent to our jet airliners.
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