A sea mark, also seamark and navigation mark, is a form of aid to navigation and pilotage that identifies the approximate position of a maritime channel...

A cardinal mark is a sea mark (a buoy or other floating or fixed structure) commonly used in maritime pilotage to indicate the position of a hazard and...

Systems or sea mark systems that are used in the pilotage of vessels at sea: Lateral marks indicate the edges of a channel. Cardinal marks indicate the...

A Special Mark, as defined by the International Association of Lighthouse Authorities, is a sea mark used in maritime pilotage. It is recognisable by its...

post or lateral mark, as defined by the International Association of Marine Aids to Navigation and Lighthouse Authorities, is a sea mark used in maritime...

A safe water mark, as defined by the International Association of Lighthouse Authorities, is a sea mark used in maritime pilotage to indicate the end of...

An Isolated Danger Mark, as defined by the International Association of Lighthouse Authorities, is a sea mark used in maritime pilotage to indicate a hazard...

Mark Sealy OBE (born 1960) is a British curator and cultural historian with a special interest in the relationship of photography to social change, identity...

Mark Rober (born March 11, 1980) is an American YouTuber, engineer, inventor, and educator. He is known for his YouTube videos on popular science and do-it-yourself...

" Lateral marker buoys Safe water mark or fairway buoys mark the entrance to a channel or nearby landfall Sea marks aid pilotage by marking a maritime...