Middle-Ground Marks (or Buoys)
Marks (or buoys) placed at the ends of middle grounds.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
Marks (or buoys) placed at the ends of middle grounds.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM