Location | Firth of Clyde NS202758 |
---|---|
OS grid | NS2031975877 |
Coordinates | 55°56′32″N4°52′44″W / 55.94232°N 4.87877°W |
Tower | |
Constructed | 1797 |
Built by | Thomas Smith, Robert Stevenson |
Construction | white tower with a black band |
Height | 76 feet (23 m) |
Operator | Clyde Port Authority |
Heritage | category B listed building |
Fog signal | (c.1895) |
Light | |
Focal height | 76 feet (23 m) |
Light source | Oil (1797–1829) argand lamp (1829–c.1900) acetylene (c.1900–) |
Intensity | 40,000 candela |
Range | 14 nautical miles |
Characteristic | Fl. W 3sec |
Cloch or Cloch Point (Scottish Gaelic : stone) is a point on the coast of the Firth of Clyde, Scotland. There has been a lighthouse since 1797 to warn ships off The Gantocks.
Cloch Point lies on the A770, north of Inverkip, three miles south-west of Gourock, on the east shore of the Firth of Clyde, directly opposite Dunoon.
The Cloch Lighthouse was designed by Thomas Smith and his son-in-law Robert Stevenson. The building was completed in 1797. There appear to be two generations of keepers' houses, the older now used as stores and the more recent having crow-stepped gables. The short circular-section tower has a corbelled walkway and triangular windows. The foghorns were added between 1895 and 1897.
The light was built by John Clarkson (engineer); Kermack and Gall built the tower, while Smith and Stevenson installed the oil lantern which was first lit on 11 August 1797. [1] The light was replaced in 1829 with an argand lamp and silvered reflector. About 1900, it was lit with acetylene. A radio beacon was installed about 1931.
The dioptric and catadioptric lenses floated in baths of mercury and were rotated by a clockwork mechanism powered by falling weights. [2] As well as tending the light, the keepers had to wind the mechanism by hand every two to three hours.
Today, the light is fully automated and unmanned. The main light has been replaced by a light on a pole outside the lantern room.
A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lenses and to serve as a beacon for navigational aid, for maritime pilots at sea or on inland waterways.
The Firth of Clyde is the mouth of the River Clyde. It is located on the west coast of Scotland and constitutes the deepest coastal waters in the British Isles. The firth is sheltered from the Atlantic Ocean by the Kintyre peninsula, which encloses the outer firth in Argyll and Ayrshire. The Kilbrannan Sound is a large arm of the Firth of Clyde, separating the Kintyre Peninsula from the Isle of Arran. Within the Firth of Clyde is another major island – the Isle of Bute. Given its strategic location at the entrance to the middle and upper Clyde, Bute played a vital naval military role during World War II.
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