Age of Sail
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The Age of Sail was a period roughly corresponding to the early modern period in which international trade and naval warfare were dominated by sailing ships, lasting from the 16th to the mid-19th century. This is a significant period during which square-rigged sailing ships carried European settlers to many parts of the world in one of the most expansive human migrations in recorded history.
Like most periodic eras the definition is inexact but close enough to serve as a general description. The age of sail runs roughly from the Battle of Lepanto in 1571, the last significant engagement in which oar-propelled galleys played a major role, to the Battle of Hampton Roads in 1862, in which the steam-powered ironclad CSS Virginia destroyed the sailing ships USS Cumberland and USS Congress, culminating with the advance of steam power, rendering sail power in warfare obsolete.
Sailing ships continued to be an economical way to transport cargo on long voyages into the 1920s. Sailing ships do not require fuel or complex engines to be powered; thus they tended to be more independent from requiring a dedicated support base on the mainland. Crucially though, steam-powered ships held a speed advantage and were rarely hindered by adverse winds, freeing steam-powered vessels from the necessity of following trade winds. As a result, cargo and supplies could reach a foreign port in half the time it took a sailing ship. It is this factor that drove sailing ships aside. Sailing vessels were pushed into narrower and narrower economic niches (see disruptive technology) and gradually disappeared from commercial trade. Today, sailing vessels are only economically viable for small scale coastal fishing, along with recreational uses such as yachting and passenger sail excursion ships.
Golden Age of Sail
The Golden Age of Sail is generally agreed to be the period in the 19th century when the efficiency and use of commercial sailing vessels was at its peak (clippers, tall ships, etc.) and immediately before steamboats started to take trade away from sail. Some would say that the Golden Age of Sail relates specifically to the clipper ship era, while others put the Golden Age of Sail between 1850 and the early 1900s when sailing vessels reached their peak of size and complexity.