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[[File:Shet-unst.png|right|thumb|300px|Map of Yell Sound and the North Isles]]
'''Yell Sound''' is the strait running between [[Yell]] and [[Mainland, Shetland]]. It is the boundary between the Mainland and the North Isles and it contains many small islands. [[Sullom Voe]], on the shores of which is a substantial oil terminal, is an arm of Yell Sound.

The ferry to the North Isles crosses the sound, which can experience strong tides and adverse weather conditions. There are numerous shipwreck sites and several lighthouses to guide shipping. Yell Sound is mentioned briefly in the mediæval ''Orkneyinga saga'' and during the 19th century there was a short flourishing of the kelp industry. Commercial fishing has long been a mainstay of the local economy and part of the sound is as Special Area of Conservation set up to protect the local wildlife. 
==Early history==
The Old Norse name was ''Alasund'' although the original meaning of the name is not clear.<ref name=Saga>Anderson, Joseph (Ed.) (1893) ''Orkneyinga Saga''. Translated by Jón A. Hjaltalin & Gilbert Goudie. Edinburgh. James Thin and Mercat Press (1990 reprint). ISBN 0-901824-25-9</ref><ref>"Alasund" is simply a Norse version of "Yell Sound"

The name of the sound today is from the island of [[Yell]].  There are various possible derivations of the island's name; almost all the place-names of Shetland are Norse or English, but Yell might originally have been a Pictish name of unknown meaning. The Proto-Norse was ''Jala'' or ''Jela'' which may have meant "white island" referring to the beaches. The Old Norse ''gjall'' signifying "barren" may be involved. See Haswell-Smith (2004) p. 467.</ref> Yell Sound is mentioned briefly in the ''Orkneyinga saga'':

<blockquote>Earl Rögnvald... and the chiefs Sölmond and Jón with him... had a fine body of troops, thought not too numerous, and five or six ships. They arrived at Hjaltland (Shetland) about the middle of Summer, but heard nothing of Frákork. Strong and contrary winds sprung up, and they brought their ships to Alasund (Yell Sound), and went a-feasting over the country.<ref name=Saga/></blockquote>

==Islands==
The north western approaches to the sound are guarded by a series of small islands north of the Point of Fethland, which is the northernmost land of [[Northmavine]], a part of the [[Mainland, Shetland|Shetland Mainland]]. The largest of the islands in the sound [[Gruney]] and a small archipelago of reefs and skerries lies north of there known as the [[Ramna Stacks]] including (from north to south) Gaut Skerries, Outer Stack, Scordar, Turla, Hyter,  Ofoora, Fladda, Flae-ass, and Barlcudda.

[[File:SamphreyFromTheAir.JPG|right|thumb|200px|Samphrey and the view north towards Bigga and Yell]]
Yell itself lies east of the sound. South of the headland of Nev of Stuis on Yell there are various islands in the sound including Sweinna Stack, Holm of West Sandwick, [[Muckle Holm, Yell Sound|Muckle Holm]], and [[Little Holm, Yell Sound|Little Holm]]. The Sound narrows between Mio Ness on Mainland and south Yell.

The islands of [[Bigga]], [[Brother Isle]], [[Lamba]], [[Orfasay]], [[Little Roe]], [[Samphrey]] and [[Uynarey]] lie in this part of the channel.

South of Firth Ness the sound widens and [[Fish Holm]], [[Linga, Yell|Linga]], Setter Holm, Sinna Skerry, and [[Wether Holm, Hamnavoe|Wether Holm]] are found here. The eastern approaches lie between Heoga Ness on Yell and [[Lunna Ness]] on the Mainland.

Gold Skerry, Green Holm and Neapback Skerries lie off the former and [[Lunna Holm]] and Sand Skerry north of the latter.

==Inlets==
[[File:Burravoe.jpg|right|thumb|200px|The harbour of Burravoe]]
There are also numerous large bays and inlets that lead off Yell Sound. The 4-mile long [[Whale Firth]] on Yell enters the sound at Nev of Stuis. Southladie Voe is some miles south on the western Yell shore to the south of [[West Sandwick]]. The large bay of Hamna Voe is at the south end of Yell north of Orfasay island. The much smaller [[Burra Voe]] lies just to the east near the village of [[Burravoe]].

The village of [[North Roe]] is on the shores of a second Burra Voe on the north Mainland side of the sound. South of there is the larger Colla Firth, separated from Quey Firth by Ness of Queyfirth. Next are [[Ollaberry|Ollaberry Bay]], Gluss Voe and [[Sullom Voe]], which is a major inlet and at 8 miles the longest of Shetland's many voes. It  contains the Sullom Voe Terminal operated by BP plc and itself has numerous bays and inlets. Sullom Voe terminates at the extraordinary [[Mavis Grind]], a narrow neck of land separating the [[North Sea]] from the [[Atlantic Ocean]].<ref>[http://www.bpnsi.com/index.asp?id=7369643D312669643D313335 "Sullom Voe"] BP</ref>

Further south are Orka Voe, Tofts Voe, Firths Voe, Swinister Voe, Dales Voe, a second Colla Firth, Swining Voe, Lumna Voe and a second and smaller Hamna Voe with an inner bay called Boatsroom Voe.

==Ferries==
[[File:Yellferries.jpg|right|thumb|200px|right|Ferries ''Daggri'' (the dawn) and ''Dagalien'' (the dusk) at Ulsta]]
The ferry from the Mainland to Yell (and then overland on to ferries for Unst and Fetlar) operates between [[Toft, Shetland|Toft]] on the Mainland, and [[Ulsta]] on Yell, the route being between the island of Samphrey to the east and Bigga to the north. ''Daggri'' and ''Dagalien'' are roll-on-roll-off ferries that have been operated since 2004 by the local council.

The first regular ferry to the North Isles was the ''Janet'', which began operating from [[Lerwick]] in 1839. The steamer ''Chieftain's Bride'' was introduced to this route in 1868 and the ''SS Lady Ambrosine'' in 1876. The ''Earl of Zetland'', an iron screw steamer of 253 tons, began a twice weekly Lerwick to Unst service with weekly visits to [[Out Skerries]] and the ports of Yell Sound. Originally the service called at numerous small villages in the sound, but after 1932 the stopping-off points were reduced in number due to competition. The ferry twice survived attacks by enemy aircraft during  World War 2. A second and larger ''Earl of Zetland'' was brought into service after 1945. The ship was popular with summer visitors but cargo was handled by a single derrick and a government subsidy of £100,000 a year was required to support the operation.<ref>Nicholson (1972) pp. 102, 105.</ref>

==Shipwrecks==
[[File:Samphrey.jpg|thumb|Ferry passing Samphrey in 2007]]
In addition to the weather conditions, sailing vessels have to contend with strong currents and numerous shipwrecks and hazardous incidents have occurred in and around the sound.<ref>NAFC (2008) Maps 27, 34.</ref>  In 1832 a fishing boat from Samphrey was caught out in a storm and blown all the way to Norway. The crew returned safely to Shetland the following spring to the relief their families, who had presumed them drowned.<ref>Haswell-Smith (2004) pp. 462-63.</ref>

The 18 ton wooden fishing smack ''Ellen'' was wrecked on the Rumble Rock, (between Samphrey and Orfasay) on 27 April 1896. In March 1904 the trawler ''Ibis'' was wrecked at the same location during a snowstorm, the crew being rescued by the trawler ''Sunbeam''. In June 1914 the 165-foot steamer '' Robert Lea'' was grounded on Stoura Baa at the north end of Brother Isle en route from Colla Firth to Liverpool also without loss of life. In 1992 the wreck was located in 5½ fathoms of water. The fishing boat ''Morning Star'' sank approximately a mile northwest of Muckle Holm lighthouse whilst under tow after a fire broke out in the engine room.

In 1983, the Royal Navy cleared ordnance from Little Holm, and their bomb disposal team discovered an unrecorded shipwreck nearby. Its identity is still unknown.<ref>{{shetlopedia|Unidentified Shipwrecks|Unidentified Shipwrecks}}</ref><ref>{{shetlopedia|Little Holm (Yell Sound)|Little Holm] Shetlopedia.com Retrieved 23 January 2009.</ref><ref>By contrast, Haswell-Smith (2004) p. 466 states that the wreck of the "SS ''Robert Lee''" lies near [[Lamba]].</ref>

There are no protected shipwrecks in the sound.

==Lighthouses==
There are several lights operated by the Northern Lighthouse Board guiding shipping in the sound. To the north Bagi Stack on Yell to the east, and Gruney and Point of Fethaland to the west are the outer lights. To the south, the outermost light is at Lunna Holm. Within the sound from north to south the lights are Muckle Holm, Little Holm, Lamba South, Outer Skerry, Brother Isle, Ness of Sound, Rumble Rock (since 2001) and Firths Voe on the Mainland.<ref>[http://wlol.arlhs.com/index.php?mode=zones&zone=SCO "Scotland"] Amateur Radio Lighthouse Society. Retrieved 25 January 2009.</ref><ref>[http://www.nlb.org.uk/news/press.htm "News..."] Northern Lighthouse Board. Retrieved 25 January 2009.</ref><ref>[http://www.nlb.org.uk/ntom/2005/23_2005.htm "Notice to Mariners: Outer Skerry"] Northern Lighthouse Board. Retrieved 25 January 2009.</ref>

==Commercial activities==
[[File:Sullom Voe.jpg|right|thumb|200px|Sullom Voe oil terminal at dusk]]
The northern part of the sound provides fishing grounds for haddock, herring and crabs. The inner sound has commercial scallop beds and various fish and shellfish farms.<ref>NAFC (2008) Maps 1-4.</ref> The profusion of seaweeds including wrack (''Fucus serratus'') and tangle (''Laminaria digitata'') was briefly exploited for commercial purposes. Between 1870 and the end of the nineteenth century several hundred tons of kelp used in the production of  iodine and bromine were exported annually from Unst, Yell and the mainland shores of Yell Sound. The many small fires burning along the shores apparently made a lasting impression on visitors.<ref>Nicholson (1972) refers to exports of "kelp" and "little kelp fires" indicating that the export was of the ash, not the seaweed. See pp. 160-61.</ref>

Away from the beaches, Yell Sound is little used for recreational purposes, possibly due to the relatively high volume of tonnage accessing Sullom Voe.<ref>NAFC (2008) Map 6.</ref> As a primary navigation channel, the entire sound is under the control of Shetland Islands Council's Ports and Harbours Operations authority and has been identified as a body of water "At Risk" of not meeting the EU Water Framework Directive.<ref>NAFC (2008) Maps 9-10, 28.</ref>

==Wildlife==
Part of the sound is as Special Area of Conservation (SAC), in part due to the high concentration of otters. The Shetland populations are possibly the densest in Europe and up to 2% of the British population may live in the site.  The low-lying peaty coastlines provide easy access to fresh water, extensive algal beds in the marine environment and large numbers of otter holts. There is also a significant population of the common seal with the local colony representing over 1% of the UK population.<ref>[http://www.jncc.gov.uk/ProtectedSites/SACselection/sac.asp?EUCode=UK0012687 "Yell Sound Coast"] JNCC. Retrieved 21 January 2009.</ref> Sullom Voe is a separate SAC, qualifying due to the numerous large shallow inlets and bays, coastal reefs and lagoons.<ref>NAFC (2008) Map 13.</ref>

There are horse mussels (''Modiolus modiolus'') beds both within Sullom Voe and on the Mainland coast near Colla Firth.<ref>NAFC (2008) Map 16a.</ref> Whales and dolphins are here too, especially harbour porpoise, minke whale and killer whales and there are a wide variety of breeding seabirds, divers and ducks including Eider ducks.<ref>NAFC (2008) Maps 20, 22-24.</ref>

==Notes==
{{Reflist|2}}

==References==
*{{Haswell-Smith}}
*Nicolson, James R. (1972) ''Shetland''. Newton Abbott. David & Charles.
*NAFC Marine Centre [http://nafc.ac.uk/Portals/0/SSMEI%20Atlas.pdf "A Marine Spatial Plan for the Shetland Islands. Part 2: Marine Atlas. Consultative Draft"] (pdf) (2008) Scalloway. SSMEI. Retrieved 23 January 2009.

{{Yell Sound}}

[[Category:Sounds of Shetland]]