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