Vector scheme a cardinal marks is a sea mark or buoy used in maritime pilotage to indicate the position of a hazard and the direction of safe water.
Bifurcation buoys for ship traffic separation on the waterway.
Vector scheme of lateral buoys. A lateral marks, as defined by the International Association of Lighthouse Authorities, is a sea mark used in maritime pilotage to indicate the edge of a channel.
Vector scheme a cardinal system marks buoys.
Sea navigation buoys used in maritime pilotage. Vector illustration.