submersible

Coast Guard officials on Thursday announced that the craft suffered a catastrophic implosion near the Titanic wreck, killing all five aboard.
“For us, it’s a very similar tragedy where warnings went unheeded," the director told ABC News.
Mike Reiss, who completed four dives with Titan operator OceanGate, said he signed "a waiver that mentions death three times on the first page."
On Wednesday, the former president’s son tweeted his suspicions about the sub, without providing much in the way of evidence or... anything else, really.