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Conn (nautical)
The conn, also spelled cun, conne, cond, conde, and cund, is the act of controlling a ship's movements while at sea. The following quote summarizes the use of the term:
Within the U.S. Navy, the captain of a vessel typically selects a junior officer to perform the role of conning for him or her. Such an individual has the title of "officer of the deck" (abbreviated ''OOD'') or "the conning officer" while on duty, and he or she will stand watches at four-hour intervals carrying out the captain's commands. However, the captain can immediately take the conn by simply issuing an order to the helm. On navy ships, neither the ship's navigator nor the ship's pilot is usually the conning officer, whereas on merchant ships the conning officer may be the captain, the pilot, or another warrant officer. The officer of the deck may give the conn to a junior officer for training purposes, in which case the officer of the deck and the conning officer may not be the same individual (the officer who has the deck retains responsibility for the ship's safe passage; the conning officer only has responsibility for giving the helm instructions on direction and thrust of the ship's engines).
It is from this term that the concept of a conning tower, an elevated platform from which a conning officer can view all aspects of a ship's movement, is derived.
Although the origin of the term is not entirely clear, it appears that "conn" is a shortened form of "conduct"; the term is also frequently used as a transitive verb, i.e., to conn (therefore ''conduct'') a ship.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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