Sidelights 2 : Red and green navigation lights visible to another vessel approaching from the side or head-on (also called combination lights); red indicates a vessels port side; green indicates a vessels starboard side
Marine Safety Working Group (MSWG), Safety on the Water, Glossary of terms, Irish Coast Guard, Department of Transport, tourism and Sport, Shannon, Co. Clare, Ireland 2012. http://www.dttas.ie/maritime/ircg/sotw/glossary/gl ossary-of-terms, (Mrtm Sfty - Brit) {568}