A-Frames (Finnart)

A-Frames, also known as Finnart, is a shore-accessible reef dive site on Loch Long, Scotland, and is regarded as one of the most popular dive sites in the loch and possibly in Scotland. The site has historical roots in the Second World War, when the Americans constructed an oil terminal here to provide a deep-water facility within the defensive perimeter of the Clyde. Parts of that terminal were later dismantled and destroyed, leaving behind structural wreckage that now forms the core of the dive site — including the distinctive A-frame pier legs that give the site its common name.

The terrain offers something across a range of depths, with remnants of the old pier found between 8 and 12 metres, and the tall A-frame structures of the old pier legs emerging from around 16 to 18 metres down, extending to a maximum depth of 40 metres. On days of good visibility, the view from the seabed up to the pinnacle of the frames is striking. The site is classified as advanced difficulty, though the shallower sections are accessible to less experienced divers.

The A-frame structures themselves are heavily colonised, covered in anemones, peacock worms, starfish, and nudibranchs. The shallower pier remnants host shore crabs, hermit crabs, squat lobsters, and shrimp. The verified species list for the site also includes dead men's fingers, crabs, crustaceans, and peacock worms throughout the structure. The site is diveable year-round, and current is light.