
The Titanic was located near Newfoundland in Canada, about 644 km from the coast when it sank in April 1912. Now what remains of the vessel, which was said to be unsinkable, is 3.8 km below sea level.
111 years later, another tragedy occurred just 487m from the front of the Titanic's wreckage. It is in this location that the submarine "Titan" is thought to have exploded, carrying five people on board who set off on Sunday, May 18, on a tour to explore the remains of the Titanic. But, for reasons still unknown, the five passengers suffered the same fate as the 1,500 Titanic passengers who perished in the Atlantic waters.

EVENTS
Four days after the "Titan" submarine lost all communication with the outside world, Ocean Gate, the company that organizes tourist tours to the Titanic ruins, declared dead the five people on board the "Titan" submarine.
In a statement to the media on Thursday afternoon, the US Coast Guard officially announced that the vessel had exploded. The time of the explosion will be revealed as the investigation that has been launched into the case progresses.
However, the US Navy detected a noise that may have coincided with an explosion on Sunday, the day the submarine lost contact with the rest of the tour team responsible, which could mean the tragedy occurred within hours of the dive.
A Coast Guard representative said the chances of the victims' bodies being recovered are slim. According to officials, search operations have found five major pieces of the vessel near the Titanic site.
WHO WERE THE PASSENGERS OF THE SUBMARINE
-Hamish Harding, 58, a British space adventurer who visited the South Pole several times.
-British businessman Shahzada Dawood, member of one of Pakistan's richest families and supporter of two charities founded by King Charles.

-Dawood's 19-year-old son.
– 77-year-old Paul-Henry Nargeolet, former French Navy diver who is said to have spent more time on the Titanic wreck than any other explorer and who was part of the first expedition to the site of the tragedy in 1987.
- 61-year-old Stockton Rush, chief executive of Ocean Gate, the company that operates tourist trips to the wreck of the Titanic.
A QUICK DEATH
The passengers of the "Titan" died instantly and did not even realize that something was going wrong. That's what a former US Navy physicist suggests.
what a submarine implosion looks like pic.twitter.com/kUkAk9uYVx
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Dale Mole told the BBC that if the submarine had not exploded, but the staff had been trapped inside, the scenario would have been worse for the passengers. Experts explained that the five passengers could have faced a lack of oxygen, increased levels of carbon dioxide and extreme sub-zero temperatures.
"You can imagine what it would be like...Cold with the oxygen levels dropping"
A FORECASTED TRAGEDY?
Two former OceanGate employees told the media as search operations continued that they had been fired after raising concerns about the safety of the Titan submarine.
The same comments were made by the director James Cameron, who joined a line of experts who raised their voice for the safety of the vessel.
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Cameron said the deep diving community had long raised concerns about the OceanGate submarine. He had even written to the company saying that "it is going down a path that will lead to disaster".
"Now we have other wrecks that unfortunately come as a result of avoiding warnings," he said.
Other experts have stated that the Titan's shape, unlike that of other submarines, made it even more exposed to the pressure created by the weight of the water.
WHAT DOES A "CATASTROPHIC EXPLOSION" MEAN IN THE CASE OF A SUBMARINE?
Implosion, the opposite of explosion, occurs when an object suddenly collapses in on itself. At those depths, there is tremendous pressure on the submersible, and even the smallest structural flaw can prove catastrophic, according to experts.
At those depths, the pressure on the submarine is 350 times greater than what we have on Earth. Any small leak could cause an immediate explosion, which would destroy the ship.
Surface pressure is measured as 1 atmosphere, which is about 103,421 Pascals. But when you dive deeper under water, that pressure only increases. At the depths where the remains of the Titanic are located, the pressure is about 421.8417 km per square centimeter.
WHAT IS SUBMARINE TOURISM?
It takes two hours to arrive at the wreck of the Titanic and another two hours to return to the surface, plus time spent exploring.
Philippe Brown, founder of the luxury travel company Brown and Hudson, says there is a very long waiting list for expeditions organized by Ocean Gate.
For some of the world's richest people, a submarine trip isn't so out of reach, says Roman Chiporukha, co-founder of Roman & Erica, a travel company with cash-strapped clients who pay at least 100 thousand dollars just for membership.
Several other expeditions have previously been made to the wreck of the Titanic. In May, a full digital scan of the Titanic's remains was made showing the entire ship in 3D.

The remains of the Titanic were discovered in 1985 and the site where the ship is today has been visited by tourists for decades now.
OceanGate Expeditions has sent crews of "citizen scientists" and "crew members" there for the past two years, though the company has completed more than 10 dives since 2010.
In the Titan dive, however, something seems to have gone wrong. As the search-and-rescue operation came to an end, what will begin now is the "hunt" for answers.