Navigation light side of the vessel, a flashing green on the starboard side of the vessel, two flashing white lights on the top and one flashing yellow on the bottom side of the fuselage. The SpaceX Dragon cargo spacecraft also features a flashing strobe along with red and green lights. Navigation light A navigation light, also known as a running or position light, is a source of illumination on a vessel, aircraft or spacecraft. Navigation lights give information on a craft's position, heading, and status. Their placement is mandated by international conventions or civil authorities. Navigation lights are not intended to provide
RMS Empress of Ireland of a manoeuvre to spin back to his previous heading to pass "Storstad" as originally intended on his starboard side, thereby avoiding what he saw as a time-wasting diversion from his preferred and fast route through the channel. When Captain Anderson of "Storstad" saw "Empress of Ireland" through the fog he thought, by seeing both "Empress of Ireland"s port and starboard lights during its manoeuvre, that "Empress of Ireland" was attempting to pass on the opposite side of "Storstad" than previously apparent, and turned his ship to starboard to avoid a collision. However, "Empress" turned to port to continue on