Clestrain Sound is a

strait A strait is an oceanic landform connecting two seas or two other large areas of water. The surface water generally flows at the same elevation on both sides and through the strait in either direction. Most commonly, it is a narrow ocean channe ...

between

Mainland Orkney The Mainland, also known as Hrossey and Pomona, is the main island of Orkney, Scotland. Both of Orkney's burghs, Kirkwall and Stromness, lie on the island, which is also the heart of Orkney's ferry and air connections. Seventy-five per cent of O ...

and the Isle of

Graemsay Graemsay () is an island in the western approaches to Scapa Flow, in the Orkney Islands of Scotland. The island has two lighthouses. Graemsay lies within the parish of Stromness. Geography and geology Graemsay lies between Hoy and Stromness ...

within the

Orkney Islands Orkney (; sco, Orkney; on, Orkneyjar; nrn, Orknøjar), also known as the Orkney Islands, is an archipelago in the Northern Isles of Scotland, situated off the north coast of the island of Great Britain. Orkney is 10 miles (16 km) north ...

Scotland Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to the ...

. Clestrain Sound lies in the western entrance to

Scapa Flow Scapa Flow viewed from its eastern end in June 2009 Scapa Flow (; ) is a body of water in the Orkney Islands, Scotland, sheltered by the islands of Mainland, Graemsay, Burray,S. C. George, ''Jutland to Junkyard'', 1973. South Ronaldsay and ...

. Like other seaways within the

, Clestrain Sound has been recognized for many years to be warmed by the

North Atlantic Drift The North Atlantic Current (NAC), also known as North Atlantic Drift and North Atlantic Sea Movement, is a powerful warm western boundary current within the Atlantic Ocean that extends the Gulf Stream northeastward. The NAC originates from wher ...

current.J. Gunn, ''Orkney, the Magnetic North'', Thomas Nelson and Sons, Edinburgh (1932)

References

Sounds of Scotland Landforms of Orkney {{Orkney-geo-stub

See also

References