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 to shipping such as a partially submerged rock.
It is recognisable by its black and red bands and top-mark of two black balls.
Its distinctive sequence of flashing light consists of 2 quick flashes with intervals of 5 seconds.
Famous quotes containing the words isolated and/or danger:
“Without the meditative background that is criticism, works become isolated gestures, ahistorical accidents, soon forgotten.”
—Milan Kundera (b. 1929)
“The Government is able to afford a suitable army and a suitable navy. It may maintain them without the slightest danger to the Republic or the cause of free institutions, and fear of additional taxation ought not to change a proper policy in this regard.”
—William Howard Taft (1857–1930)