How does a floating dock work?
A floating dock is a platform or ramp supported by pontoons or poly encapsulated foam. These are usually joined to the shore with a ramp, also called a gangway, that rests upon the dock on rollers, to adjust for the vertical movement of the dock. The dock is usually held in place by vertical poles embedded in the soil under the water or by anchored cables.
Frequently used in small boat marinas, this type of dock maintains a fixed vertical relationship to watercraft secured to it, independent of tidal, river, or lake elevation.