“The lighthouse is still in use as a navigation mark... In the nautical almanacs and charts the mark is indicated as ‘Iso.5s17m9M(tidal)’ which means equal on-off every 5 seconds, light 17m above sea level, range 9 miles. It operates at night when there is sufficient water to enter the harbour (3.7m tidal depth over datum)” Richard Lawson, Assistant Harbour Master (Leisure)
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