A stanchion (/ˈstæntʃən/) is a sturdy upright fixture that provides support for some other object.[1] It can be a permanent fixture.
In nautical terms, the stanchion is the thick and high iron that with others equal or similar is placed vertically on the gunwale, stern and tops.[2][3][4]
Stanchions are used to support life lines that keep people from falling off the side of the boat during heavy weather or simply moving around the hull.[2][3]