Firth of Clyde

The Firth of Clyde forms a large area of coastal water, sheltered from the Atlantic ocean by the Kintyre peninsula which encloses the outer firth in Argyll and Ayrshire, Scotland.At its entrance the firth is some 26 miles (42 km) wide. Its upper reaches include an area where it is joined by  Loch Long and the Gare Loch. This includes the large anchorage off Greenock known as the Tail of the Bank in reference to the sandbar which separates the firth from the estuary of the River Clyde. The Clyde is still almost 2 miles (3 km) wide at the sandbar, and its upper tidal limit is at the tidal  Weir adjacent to Glasgow Green.
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Noun
1. a firth on the southwestern coast of Scotland emptying into the North Channel
(hypernym) firth
(part-holonym) Scotland