cardinal mark
Noun
Meaning
cardinal mark (plural cardinal marks)
(nautical) A sea mark (a buoy or other floating or fixed structure) used in pilotage to indicate the position of a hazard and the direction of safe water.
Noun
cardinal mark (plural cardinal marks)
(nautical) A sea mark (a buoy or other floating or fixed structure) used in pilotage to indicate the position of a hazard and the direction of safe water.