Every vessel lying alongside a wharf, or vessel lying alongside a vessel
berthed at a wharf shall, from sunset until sunrise, be provided with the proper
lights, and shall be provided continuously with the appliances in the way of
gangways and manropes as may, in the opinion of the Harbor Master or in fact, be
necessary for the convenience and safety of person passing to and from the
vessel. Every gangway fixed for the purpose of giving the crew or other
persons access to the ship after dark, shall be brightly illuminated by the best
available means as long as such gangway is in use.