An astronaut who's flown five missions in space and climbed Mount Everest has just wrapped up a scientific mission to what divers call the "Mount Everest of Shipwrecks," the S.S. Andrea Doria.
It's a "huge bucket list thing," admits Scott Parazynski, who co-piloted the five-person manned submersible Cyclops I to the wreck, which lies off the coast of Massachusetts at a depth of more than 61 metres.
The week long expedition to the Andrea Doria, organized by submersible company OceanGate, was designed to collect information on the current condition of the wreck. Researchers on return trips to the wreck will use that information to better understand how modern shipwrecks decay in marine environments.
'Sixteen people have died while diving the Andrea Doria, including a neuroscience professor who disappeared on the wreck in 2015'.
While bad weather cut the expedition short, a news conference revealed that the wreck has experienced significant decay in the two years since the last images of the Andrea Doria were captured, and that the entire superstructure of the 212-metre-long vessel has collapsed.
An Iconic Maritime Tragedy
The luxury Italian liner Andrea Doria sank off the coast of Nantucket in July 1956 after being struck by the Swedish liner M.S. Stockholm. While the Andrea Doria managed to stay afloat for more than 11 hours after being struck, 46 people died in the collision. Media coverage of the ship's sinking and its aftermath helped make the Italian liner synonymous with 20th-century maritime disasters.
The Italian liner S.S. Andrea Doria sinks in the Atlantic after a collision with the liner M.S. Stockholm in July 1956. While the luxury vessel took 11 hours to sink, 46 people died in the collision. [PHOTOGRAPH BY LOOMIS DEAN, THE LIFE PICTURE COLLECTION, GETTY IMAGES]
Now, 60 years after the liner's sinking, the wreck is collapsing as a result of environmental conditions and fishing activity.
The top of the wreck, which was originally in about 48.8 metres of water, has now dropped below 200 feet (61 meters). The majority of the structure is about 73.2 metres deep.
The continued decay of the Andrea Doria means that the shipwreck is becoming more elusive and dangerous to scuba divers. Where it's now located is at least 21 metres deeper than suggested maximum depth for recreational divers.
Steel ships with aluminum superstructures, like the Andrea Doria and so many wrecks from World War II, are very common and potentially polluting.
Stockton Rush | CEO, OceanGate
Advanced divers using technical gear and mixed breathing gas can stay less than 20 minutes on the wreck, in conditions that involve strong currents and low visibility. The dangers involved in exploring the remains of the iconic vessel have led divers to dub it the "Mount Everest of Shipwrecks."
Sixteen people have died while diving the Andrea Doria, including a neuroscience professor who disappeared on the wreck in 2015.
What Decaying Wrecks Do to Our Oceans
By using a manned submersible, researchers were able to safely spend hours exploring the wreck site, where they collected sonar data that will be used to create a very high resolution , 3-D model of the vessel remains to serve as a baseline for future visits to the Andrea Doria. This will help scientists better understand how shipwrecks deteriorate and how that decay may impact the marine environment, says OceanGate CEO Stockton Rush.
In this top-down sonar scan from the Andrea Doria expedition, the ship's bow is visible on the left with a port rail extending to the right. The seabed around the wreck shows evidence of scouring by strong undersea currents. [PHOTOGRAPH COURTESY OCEANGATE INC.]
"Steel ships with aluminum superstructures, like the Andrea Doria and so many wrecks from World War II, are very common and potentially polluting," says Rush. "There's a lot about their decay processes that are not well understood."
From the Bottom of the Atlantic to Seas of Europa
While seeing the remains of the Andrea Doria with his own eyes may be a boyhood dream of astronaut Parazynski, there's a bigger reason why he's co-piloting the vessel that took him to the wreck.
"There's just a great synergy going on right now between ocean exploration and space exploration".
Scott Parazynski | submersible co-pilot and astronaut
"We can take these types of technologies to explore extremophile life in the oceans," he says, which will in turn help us evaluate the possibility of life in extreme environments on other planets.
Astronaut Scott Parazynski, shown here during a 2007 space walk, believes the best exploration "takes place as a human-robotic partnership." He's confident that submersible technology can help us find extraterrestrial life. [PHOTOGRAPH BY NASA]
"For instance, what might lie in the waters under the icy crust of [Jupiter's moon] Europa? If we can someday drop a submersible through the ice and swim around there, would we find extremophile life there as well?
"There's just a great synergy going on right now between ocean exploration and space exploration," says Parazynski.
Just as importantly, being part of a manned mission on a submersible brings advantages to explorers that piloting a remotely operated vehicle (ROV) from topside doesn't offer.
"My firm belief is that the best exploration takes place as a human-robotic partnership," says the astronaut, who has performed seven space walks during his five missions with NASA.
"It's like having MacGyver in the loop; it's about real-time problem solving that really can save the day when it comes to extreme exploration."