Section 149.540 - What are the requirements for obstruction lights on a single point mooring?(a) The lights for a single point mooring must meet the requirements for obstruction lights in part 67 of this chapter, except that the lights must be located at least 10 feet (3 meters) above mean high water.(b) A submerged turret loading (STL) deepwater port is not required to meet the requirements for obstruction lights, provided it maintains at least a five-foot (1.5 meters) clearance beneath the net under keel clearance at the mean low water condition for all vessels transiting the area.(c) An STL deepwater port that utilizes a marker buoy must be lighted in accordance with paragraph (a) of this section.