|
Line throwers are devices for throwing lines to remote positions. They have a long history, and are used in a variety of situations. ==History== In 1791 John Bell proposed a system to launch a line from a ship in distress to the shore, but this does not seems to have ever been implemented. In the early 19th century however, a range of shore-based systems were developed and deployed for the rescue of sailors from stranded ships—a serious problem in the age of sail and before modern navigation and communication systems. Examples include: * Manby Mortar, 1814, installed at 59 British rescue stations in the next two years * Henry Trengrouse's rocket-based system of 1818 had a better range, and was far easier to transport * Lyle gun, 1877, a small cannon, developed for the United States Life-Saving Service] * Boxer rocket, 1855, a two-stage rocket used in rescue line applications until World War II 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Line thrower」の詳細全文を読む スポンサード リンク
|