British submariners are a major part of the UK's naval history. They have attacked enemy ships and disrupted naval battles.
The Royal Submarine Force fought many epic naval wars during the 20th century, proving they were more than a nuisance, they could be a real threat. In fact, a submarine was one of the most important weapons in the world during World War II, destroying more German shipping than any other Allied boat.
It was also the first time that a British submariner received a Victoria Cross, awarded to Lieutenant Commander Malcolm David Wanklyn, who commanded HMS Upholder in the Mediterranean during the war. He and his men won a remarkable victory record, sinking thousands of tons of enemy ships.
Submariners loved this job. They could be on patrol for up to six months at a time.
The submarine was their home away from home and they often lived in the bowels. Their galley was equipped with four meals per day and all were freshly prepared by the navy chef.
Their lives were hard but not impossible. The noxious engine fumes made it a difficult environment, and they were prone to diseases.
Red Flu was the first to strike, resulting in the death of large numbers of their crew. It spread quickly and almost everyone perished.
MRSA, a deadly infection that infected the crew's bloodstream, was another fatal disease. This stifled their immune system, making it easier for them to die.
During the Falklands War HMS Conqueror was attacked by three submarines, HMS Splendid, HMS Splendid, and HMS Spartan, but they were not able to engage the Task Group 79.1 Argentine Navy carriers.
They were also a key player in the Cold War by preying on enemies trade. They submerged a number Turkish and Soviet merchant ships. HMS Swiftsure was a submarine that Barrow-in-Furness designed. It also sank the German cruiser in North Sea.
Today, the submarines of the UK's Royal Navy still play a vital role in the national security of the UK. They form the basis of a Continuous at Sea Deterrent. This means that one submarine can be stationed anywhere in the world with nuclear missiles and is ready to launch them at any moment, 365 days per year.