Shanghaiing or crimping is the practice of kidnapping people to serve as sailors by coercive techniques such as trickery, intimidation, or violence.
The related term press gang refers specifically to impressment practices in the United Kingdom's Royal Navy.
[9] The role of crimps and the spread of the practice of shanghaiing resulted from a combination of laws, economic conditions, and the shortage of experienced sailors in England and on the American West Coast in the mid-19th century.
[14] These factors set the stage for the crimp: a boarding master who uses trickery, intimidation, or violence to put a sailor on a ship.
[15] The most straightforward method for a crimp to shanghai a sailor was to render him unconscious, forge his signature on the ship's articles, and pick up his "blood money".
Demand for manpower to keep ships sailing to Alaska and the Klondike kept crimping a real danger into the early 20th century, but the practice was finally ended by a series of legislative reforms that spanned almost 50 years.
[20] The widespread adoption of steam-powered vessels in the world's merchant marine services in the late 19th and early 20th centuries radically altered the economics of seafaring.
The sinking of the RMS Titanic, followed by the onset of World War I (which made the high seas a much more dangerous place due to the threat of submarine attack), provided the final impetus to stamp out the practice.
In 1915, Andrew Furuseth and Senator Robert M. La Follette pushed through the Seamen's Act of 1915 that made crimping a federal crime, and finally put an end to it.