Floating dock (jetty)
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A floating dock, floating pier or floating jetty is a platform or ramp supported by pontoons. It is usually joined to the shore with a gangway. The pier is usually held in place by vertical poles referred to as pilings, which are embedded in the seafloor or by anchored cables.
A floating dock at Mohonk Mountain House
A floating dock at Florence Marina State Park
A floating dock at a private marina. The vertical "spud" only anchors the dock sections in place, does not provide structural support for loads upon the dock.