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Day Skipper revision module 12 of 17
Lighthouses, beacons, and light characteristics used for navigation.
6 guided lessons · 15 practice questions · 12 flashcards
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Before a night or low-light approach, mark the lights, leading marks and sectors you expect to see, the sequence in which they should appear, and what you will do if an expected cue is ab...
Every navigational light has a defined character: the repeated pattern of light and dark that lets you identify it from a chart or the Admiralty List of Lights. The most common chart abbr...
On a chart, a light is described in a standard format, e.g., 'Fl(2) WR 10s 15m 12M'. This reads: Group flashing (2 flashes), White and Red sectors, period 10 seconds, height 15 metres abo...
Many navigation lights show different colours or characters in different directions. White often marks a planned or preferred sector and red or green may mark flanking or danger sectors,...
Lighthouses and major fixed lights may be identified by charted structure, daymark, light character and sometimes a fog signal. On paper charts a light flare indicates a lighted feature;...
Some lighthouses and aids have charted sound signals such as horns, sirens, bells or gongs. A notation such as Horn(2) 30s describes two blasts in a complete 30-second period. Check the c...
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This independent revision material is not a substitute for current official publications, competent instruction or on-water judgement.