The
Firth of Clyde encloses the largest and deepest coastal waters in the British Isles, sheltered from the
Atlantic Ocean by the
Kintyre peninsula which encloses the outer
firth in
Argyll and
Ayrshire,
Scotland. The
Kilbrannan Sound is a large arm of the Firth of Clyde, separating the
Kintyre Peninsula from the
Isle of Arran. Within the Firth of Clyde is another major island - the Isle of Bute. Given its strategic location, at the entrance to the middle/upper Clyde, Bute played a vitally important military (naval) role during World War II.