Lost WW1 German U-boat wreck found off Norfolk coast Published duration 21 January 2016 Related Topics World War One

image copyright Military History image caption Artist's impression of what U-31 might have looked like

The wreck of a World War One German U-boat has been found off the coast of Norfolk.

Scans by windfarm developers showed the submarine lying about 55 miles (90km) east of Caister-on-Sea.

U-31 went missing in January 1915, struck a mine in the North Sea and sank. All 35 men on board died. Its whereabouts were not known until now.

As an official military maritime grave, the wreck of U-31 will remain in its final resting place.

media caption German WW1 U-boat wreck identified off Norfolk coast

U-31 was the first of 11 Type U-31 submarines to be commissioned by the Imperial German Navy between 1912 and 1915.

Numbered from 31 to 41, three surrendered and eight sank. The whereabouts of two of those that sank - including U-31 - was unknown, Mark Dunkley, marine archaeologist at Historic England, said.

image copyright Lamlash North Sea Diving image caption Divers managed to get clear footage allowing the wreck to be identified

image copyright Fugro/Scottish Power Renewables image caption Scans showed the submarine lying on the seabed

He called the discovery by windfarm developers ScottishPower Renewables and Vattenfall "a significant achievement".

'Remarkable condition'

Scans of the seabed turned up more than 60 wrecks over a two-year period. Most of these were already known about, but the U-boat was "entirely unexpected", developers said.

image copyright BBC iWonder image caption The men on board U-31 would have lived in very cramped conditions

At first it was thought the wreckage might be a Dutch Navy submarine, missing since June 1940, however, after several dives it was eventually found to be the much earlier German submarine.

image caption The wreckage of U-31 was found in the southern North Sea about about 55 miles (90km) east of Caister-on-Sea

A team from Lamlash North Sea Diving managed to get clear footage of the U-boat, lying on the seabed at a depth of 98ft (30m), allowing accurate identification of U-31.

U-boats and U-31

image copyright Military History

U-31 was one of 375 German submarines - U-boats - that set sail from German ports in World War One

They had a range of about 8,000 nautical miles (14,800km)

Sailors could spend around five days on war patrol but only had 72 hours' air supply

202 U-boats were lost in action during the war

Out of 17,000 men who served on board them, more than 5,100 lost their lives.

U-31 left Wilhelmshaven in Germany on a routine patrol and disappeared on 13 January 1915

It is believed it hit a mine and sank. All four officers and 31 men were lost

U-31 is 190ft (57.6m) in length, 13ft 6in (4.1m) wide and 19ft 6in (4.6m) high

Its bow had been damaged and debris surrounding it suggested U-31 could have been up to 230ft (70m) long

Source: BBC iWonder/ScottishPower Renewables

"After being on the seabed for over a century, the submarine appears to be in a remarkable condition with the conning tower present and the bows partially buried," Mr Dunkley said.

"Relatives and descendants of those lost in the U-31 may now take some comfort in knowing the final resting place of the crew and the discovery serves as a poignant reminder of all those lost at sea, on land and in the air during the First World War."