RICHARD WAREHAM FOTOGRAFIE / SCIENCE PHOTO LIBRARY RICHARD WAREHAM FOTOGRAFIE / SCIENCE PHOTO LIBRARY
Cardinal marker buoys. The black-and-yellow markings on these buoys use an internationally recognised system to allow mariners to recognise hazards in waterways and channels and to navigate past the buoy, either north, south, east or west (the cardinal points of the compass), to avoid the hazard. These buoys have solar panels on them to power their lights. Photographed on the island of Terschelling, Friesland, the Netherlands.
Model release not required. Property release not required.