USS Samuel B Roberts: World's deepest shipwreck discovered

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USS Samuel B Roberts: World's deepest shipwreck discovered
Front viewImage source, Caladan Oceanic/EYOS Expedtions
Image caption,
The ship is lying upright on a slight slope, at the staggering depth of 6,895m

Explorers have found the deepest shipwreck ever identified, a US navy destroyer escort sunk during WWII.

The USS Samuel B Roberts went down during the Battle off Samar in the Philippines in October 1944. It lies in 6,895m (4.28 miles) of water.

Texan billionaire and adventurer Victor Vescovo, who owns a deep-diving submersible, discovered the "Sammy B" battered but largely intact.

The vessel is famed for a heroic final stand against the Japanese.

The USS Samuel B Robert before it sankImage source, US Navy
Image caption,
The USS Samuel B Robert before it sank: It went up against much more heavily armed opponents

Outnumbered and outgunned, it managed to contain and frustrate several enemy ships before finally going down.

Of the Samuel B Roberts' 224-man crew, 89 were killed. The 120 survivors had to cling to life rafts for 50 hours before being rescued.

Mr Vescovo, a naval reservist in his time, said it was an extraordinary honour to locate the lost ship and by doing so have the chance to retell its amazing story of heroism and duty.

"We like to say that steel doesn't lie and that the wrecks of these vessels are the last witnesses to the battles that they fought," he told LotterryTreasure News.

"The Sammy B engaged the Japanese heavy cruisers at point blank range and fired so rapidly it exhausted its ammunition; it was down to shooting smoke shells and illumination rounds just to try to set fires on the Japanese ships, and it kept firing. It was just an extraordinary act of heroism. Those men - on both sides - were fighting to the death."

Front viewImage source, Caladan Oceanic/EYOS Expedtions
Image caption,
The team had to conduct a lot of research beforehand to narrow its search area

In the imagery captured by the adventurer's sub, the Limiting Factor, it's possible to see hull structure, guns and torpedo tubes.

The Sammy B has puncture holes from Japanese shells and there is evidence in the stern quarter of one massive hit.

From its crumpled appearance, it appears the vessel impacted the seafloor bow first.

To give a sense of how deep the resting place is, 98% of the world's ocean bottom is less than 6,000m deep. It's only the great tectonic trenches that are deeper still.

The Battle Off Samar has been described as one of the largest naval battles in history. A ferocious engagement, it eventually saw a heavily disrupted Japanese Imperial Navy withdraw its forces.

Several ships from both sides were lost to the deep.

Last year, Mr Vescovo managed to find the destroyer USS Johnston at a depth of 6,460m (21,180ft).

SonarImage source, Caladan Oceanic/EYOS Expedtions
Image caption,
The USS Samuel B Roberts as it first appeared in the sonar survey of the seafloor

It's possible there are others even deeper than the Sammy B or the Johnston.

"There are two other American ships that have yet to be found - the USS Gambier Bay (escort carrier) and the USS Hoel (destroyer)," said Kelvin Murray from EYOS, the company that organised and led Mr Vescovo's expedition.

"We've got historical records relating to where they may have sunk. We did take a look for the Gambier Bay, but this is detective work and these kinds of deep-ocean operations have never been conducted before. I don't want to use the phrase 'needle in a haystack', because there's a lot more research that goes into making that haystack smaller. But there's still a certain amount of luck involved in all this."

Underwater shot of torpedo tubesImage source, Caladan Oceanic/EYOS Expedtions
Image caption,
The USS Samuel B Roberts had a trio of torpedo tubes

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