The wreck of what is believed to be UB-65, a World War I German U-Boat lost in 1918, has been uncovered by divers laying an undersea power cable off the coast of Stranraer, Western Scotland.
Dr Innes McCartney, a historian and nautical archaeologist, told the BBC;
The submarine was caught on the surface at night, recharging its batteries. It saw the patrol ship coming. It attempted to do a crash dive to get away. Once the submarine was under water, it rapidly started flooding from above so they had no option but to blow all the compressed air they had, bring the submarine to the surface at which point all they could do was surrender.
The U-Boat then sank again for the last time.
The wreck was discovered by engineers involved in the £1bn Western Link project which involves laying a 239 mile sub-sea power line between Ayrshire and the Wirral that will carry renewable energy produced in Scotland to England and Wales. The engineers found the wreckage 120m north-west of the centre of the planned route. It is hoped further investigation of the wreck will confirm its identity.