The Firth of Clyde reference article from the English Wikipedia on 24-Jul-2004
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Firth of Clyde

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The Firth of Clyde is the estuary of the River Clyde, from its upper tidal limit in Glasgow city centre to the outer firth in Argyll and Ayrshire. It includes the Mull of Kintyre, the sea lochs, and the islands of Arran, Bute, Great Cumbrae and some smaller islands.

In 1942 the World's first deep water test of a submarine oil pipeline was conducted on a pipeline laid across the Firth of Clyde in Operation Pluto.

See: Islands of the lower Firth of Clyde, Firth of Clyde Forum

Towns and villages along the shoreline