32lb cannon from HMS Colossus 1798
This is one of the Blomefield pattern 32lb guns from the wreck of HMS Colossus. The gun now lies on the seabed over 60 metres from the stern of the wreck. This gun would originally have been on the main gun-deck of the ship. Notice that the gun now lies upside down with iron chain wrapped around the barrel of the gun.
Further information at www.cismas.org.uk