Abstract :
There can be few waterways around Britain more feared by sailors or more treacherous to shipping than the approach to the English Channel near Plymouth. This is where the notorious Eddystone Rocks break the sea´s surface 12 miles SSW of Plymouth Sound. Placing warning lights at Eddystone was one of the great construction challenges of the 17th and 18th centuries, due to their inaccessibility, the huge swells and the reef´s partial submersion.