Running Lights.
A sailing vessel, when running at night, carries a green light on her starboard side, and a red light on her port side. Such lights are generally carried in the rigging, about six feet above the rail.
A rowboat must carry a white light in a lantern to show when in danger of being run down.
A steam vessel carries the same lights as a sailing vessel, with the addition of a white light at the foremast head, or on launches on top of the pilot house.
A steam vessel, when towing another vessel, carries two white lights; if she is towing more than one vessel, tandem fashion, she shall carry three white lights.