The Dock Unit is recommended for docks where geese congregate, and to control geese on the land and water immediately around the dock. The Unit is satisfaction guaranteed to deter geese from the marinas and docks that geese find so secure, and is easily taken on and off of the included Bracket. Like the Residential Unit, the light is mounted on a cylindrical base comprised of ¼-inch thick ABS black plastic that will never fade, crack, or need to be replaced. Installation is simple; the base inserts into the galvanized steel Dock Bracket that is bolted to the side of the dock. Additional Dock Bracket(s) can be purchased to change the location of the Dock Unit between different areas of the dock, which adds an additional level of deterrence.