A-3 Submarine – This was one of the earlier submarines to enter service with the Royal Navy prior to WW1. This class of vessel however suffered a run of bad luck when firstly the A-1 was hit by steamer whilst exercising in the Solent and sank with all hands. Later in the same area the A-3 was hit by HMS Hazard and sank with all crew members in February 1912. She was eventually recovered back to Devonport and the crew were buried with full honours. Later that same year she was intentionally sunk as a sonar target where she now lies upright. The vessel is complete except for the outer conning tower. This has been salvaged.