Barrier
A barrier is a physical structure or obstacle that is used to prevent or limit the movement of ships or boats in a particular area. Barriers can be natural, such as reefs or sandbars, or man-made, such as breakwaters, jetties, or booms. They are often used to protect harbors, ports, or other areas of water from the effects of waves, currents, or storms. Barriers can also be used to control the movement of ships and boats, such as in the case of security barriers that are used to prevent unauthorized access to sensitive areas. In some cases, barriers may be temporary, such as during construction or maintenance work, while in other cases they may be permanent fixtures of the maritime landscape.
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