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This is on the mainland at St Abb's Head, Scottish Borders.
The horn house was built in 1910. The foghorn could originally be rotated.
c.1935 Three Atlantic engines were installed to drive Alley and MacLellan air compressors for the fog sirens. They were started as petrol engines with spark ignition, and were switched to paraffin after 10 minutes' running. The Atlantic engines were replaced by Kelvin diesels in 1955. Use of the sirens was discontinued in 1987.