Titan, operated by OceanGate Expeditions, is a commercial undersea vessel that takes individuals like doctors, artists, researchers, biologists, and divers down to the world's most famous shipwreck site - the ruins of the Titanic.
Tours to the 'unsinkable' sunken ship are quite common now, as Titan has been operating for over a year.
"Titan is the only five-person sub capable of going to the Titanic depth, which is half the depth of the ocean," said Stockton Rush, founder and CEO of OceanGate.