Isolated danger mark

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Examples of Isolated Danger Marks

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.

Isolated Danger Mark near Hvar, Croatia

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.

See also[edit]

References[edit]