Navigation Light Characteristics                                    Skysail Training Home page  

Lighthouses and navigation marks have a characteristic pattern of lights which makes them uniquely identifiable on your area of the chart. They may be fixed, flashing, isophase, occulting etc - see diagram below.  The flashes may be in groups.

A Moiré Light is used to provide a directional beam: Example - a transit for a narrow bridge  see Moire_light.pdf

Isophase  Occulting  Directional  Flashing Quick Flashing  Fixed Diaphone Nautophone  Sectored Light

Posted Thursday 5th November 2009