Nab Tower

Nab Tower Lighthouse
LocationNab Rocks, near the Isle of Wight, England
Coordinates50°40′03″N 0°57′04″W / 50.66749733°N 0.951162862°W / 50.66749733; -0.951162862
Tower
Constructed1918 towed into position 1920
ConstructionSteel and concrete
Automated1983
Height17 m (56 ft)
ShapeBroad cylindrical tower faced with reinforced concrete
MarkingsUnpainted tower, white light
OperatorTrinity House
Fog signal1 blast every 30s. (range 2 nmi (3.7 km))
RaconT 
Light
First lit1920
Focal height17 m (56 ft)
Light sourceVega LED lantern
Intensity2,850 candela
Range12 nmi (22 km)
CharacteristicFl W 10s.

The Nab Tower is a tower originally planned for anti-submarine protection in the English Channel in World War I. It was sunk over the Nab rocks east of the Isle of Wight to replace a lightship after the war, and is a well-known landmark for sailors as it lies off Spithead and marks the deep-water eastern entry into the Solent.