Cairns of Coll

View of the skerries around Eilean Mòr from the vicinity of Sgeir Stangail.

The Cairns of Coll refers primarily to a region of rocky outcrops in shallow waters extending from the north end of the Island of Coll in the Inner Hebrides of Scotland. The extension is about 1.1 miles from shore, 1.6 if the Cairns of Coll Rocks 0.5 miles further are to be included. The outcrops of the Cairns are too small to be inhabited. The swift and unpredictable tidal currents between them make navigation hazardous to boats. They are rich in abundant and varied marine life, including the marine mammals.

Geography

Some several dozen sgeiran (skerries) are arranged in groups around three islets.[1] The largest group, that around Eilean Mòr, comprises also about 40 skerries. Only the largest have been named. They include Sgeir Ghlas, Sgeir Leathan, Sgeir Eoin Bhàin, Sgeiran nan Cuiseag, and Sgeir an Otraich. To the northeast is Eag na Maoile and about 15 skerries. To the northwest of it, and north of Eilean Mòr, is Sùil Ghorm, which has a lighthouse, and about 15 skerries. There are more outcrops between Eilean Mòr and Coll. Seen as real estate, the package includes or once included a house on the north coast of Coll.

The light is placed on the outermost buildable land of the Cairns, but not on the outermost outcrop. A half-mile further out is a group of two outcrops barely breaking the surface at high tide, an extreme hazard. In the nautical books and charts of the 19th and earlier 20th centuries these were named the Cairns of Coll. It is not certain whether the name referred only to the two rocks or was a title for the whole group. In the later 20th century some nautical documents began to refer to them as the Cairns of Coll Rocks, to be considered as being in the Cairns of Coll. Otherwise the meaning must be gleaned from the context.

A navigational work of the late 19th century reports: "The passage between the Cairns of Coll and Suil Ghorm is half a mile across, and affords a deep clear channel, though it should never be used except by persons possessing local knowledge, as the tides run with considerable velocity."[2] "Persons possessing local knowledge" refers to a maritime pilot, who was employed ubiquitously for navigation in coastal and inland waters in the age before electronic navigation. Today's maritime road around Coll lies well to the north of the Cairns of Coll Rocks.

Lighthouse

Cairns of Coll Light
Suil Ghorm

Cairns of Coll light
Argyll and Bute
Location Suil Ghorm skerry
Island of Coll
Argyll and Bute
Scotland
United Kingdom
Coordinates 56°42′16″N 6°26′43″W / 56.704466°N 6.445381°W / 56.704466; -6.445381
Year first constructed 1909
Construction metal tower
Tower shape cylindrical tower with balcony and lantern
Markings / pattern white tower and lantern
Height 7.5 metres (25 ft)
Focal height 23 metres (75 ft)
Light source solar power
Characteristic Fl W 12s.
Admiralty number A4084
NGA number 4020
ARLHS number SCO-032
Managing agent Northern Lighthouse Board[3]

Being a fatal hazard to unwary deep-water vessels, the Cairns of Coll are marked by a beacon constructed on Sùil Ghorm, called variously the Coll, Cairns of Coll, or Sùil Ghorm light, lighthouse, or beacon. Work has been done on it repeatedly for varying lengths of time. The year of first construction is 1909.[4] It is a design of David Alan Stevenson and Charles Alexander Stevenson who were engineers of the noted Stevenson family, which worked for generations for the Northern Lighthouse Board. The lighthouse is a metal tower with gallery and lantern painted white, powered by solar panel, emits a white flash every 12 seconds and is operate by Northern Lighthouse Board.

See also


References

  1. ↑ "Map of Cairns of Coll". "(c) The Gazetteer for Scotland, 2011". "Used with permission from The Gazetteer for Scotland at http://www.scottish-places.info/"
  2. ↑ Great Britain. Hydrographic Department. (1886). West coast of Scotland pilot. Great Britain.; Hydrographic Department.; Pilot guide (Third ed.). London: Hydrographic Office, Admiralty. p. 176.
  3. ↑ Cairns of Coll light The Lighthouse Directory. University of North Carolina at Chapel Hill. Retrieved 22 May 2016
  4. ↑ "Suil Ghorm - Details of Intended Beacon Light" (PDF). The London Gazette (1443). October 1, 1909. Retrieved August 29, 2015.


Wikimedia Commons has media related to Cairns of Coll.

Coordinates: 56°42′N 6°27′W / 56.70°N 6.45°W / 56.70; -6.45

This article is issued from Wikipedia - version of the 5/22/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.