These are the long-forgotten shipwrecks of the Atlantic, their history dating back over a century to the First World War.
Scattered just off the Irish coast, these sunken vessels met their fate through torpedoes and mines, now resting on the seabed of the vast ocean.
Within this underwater graveyard lie a variety of wrecks, including merchant vessels, submarines, and ocean liners, with the venerable HMS Audacious claiming the title as the oldest relic among them.
She sank in October 1914 after hitting a German mine off Tory Island, which is nine miles off the Donegal coast.
Only one person on board died after Titanic’s sister ship, the White Star liner Olympic, came to the rescue.
Also on the seabed is HMS Viknor, an armed merchant cruiser which sank without sending a distress signal.
All 295 Royal Navy officers on board died in January 1915 and she now rests under almost 300ft of water.
Remarkably, the Viknor’s wreck was only found almost a century later in 2006 by an Irish survey vessel.
Among the other sunken boats found off the Irish coast is the SS Justicia, a White Star liner built in Belfast.
She was torpedoed 23 miles south of Skerryvore in Scotland by German Type III Coastal U-boat UB-64.
The watertight doors were shut, temporarily keeping her afloat, but then she was then hit three times more.
The Justicia was then towed before she was found by UB-64 and hit again twice, which eventually sunk her.
Sixteen crew members were killed but the rest were evacuated and the ship now lies in 235ft of water.
Sherman tanks can also be found on the seabed from the Second World War wreckage of a cargo steamer.
The Empire Heritage was torpedoed by U-482 on the way from New York to Liverpool, claiming 112 lives.
The attack happened 15 miles north west of Malin Head – and she now rests in 225ft of water.
Darragh Norton, a chemist from Ireland, was fortunate enough to experience the wrecks on a dive.
The 43-year-old said: ‘The seabed is littered with ocean liners, to German World War One and World War Two submarines and numerous merchant vessels.
‘Most of the wrecks lie beyond the reach of recreational divers, requiring specialised equipment and exotic gases associated with technical diving. I dive them every year.’
HMS AUDACIOUS (1 DEATH)
Type of boat: Battleship
Route: Gunnery exercises at Loch na Keal in Ireland
Who sank it: German mine
Where: Off Tory Island, Ireland
When: October 1914
HMS VIKNOR (295 DEATHS)
Type: Armed merchant cruiser
Route: From Kirkwall in Orkney to Liverpool
Who sank it: German mine
Where: Off Tory Island
When: January 1915
SS JUSTICIA (16 DEATHS)
Route: From Belfast to New York
Who sank it: German Type III Coastal U-boat UB-64
Where: South of Skerryvore, Scotland
When: July 1918
SS EMPIRE HERITAGE (112 DEATHS)
Type: Steam tanker
Route: From New York to Liverpool
Who sank it: Torpedoed by U-482
Where: North-east of Tory Island
When: September 1944
HOW THE NORTH IRISH COAST BECAME A GRAVEYARD FOR SHIPS IN THE WARS
The seas off the North Irish coast are well known as being a mass graveyard for First and Second World War ships and submarines.
During the First World War, the area was a key strategic route for Allied navies and was used to keep important trade routes running, including to America.
The British fleet suffered heavy losses in what became known as the Atlantic U-boat campaign, with nearly half of Britain’s merchant marine fleet destroyed during the course of the war by German torpedoes or mines.
As well as First World War vessels, the seabed to the north of Ireland and west of Scotland is also the resting place of a number of ships sunk during the Second World War.
Allied convoys regularly passed the area on their way to and from the large ports at Glasgow and Liverpool.
During six years of intense action in the Battle of the Atlantic, ships would often be clustered in the coastal waters nearby and as a result of the heavy shipping traffic, the Nazis saw it as a crucial target.
But it also became a deadly place to be for German U-boats which were vulnerable to aircarft near land as well as Royal Navy vessels.