James Cameron said members of the deep-diving community had long warned about what they saw as safety flaws in the design of OceanGate Expedition's Titan sub.
the titanic submersible. cnn s jason carroll is live in boston where some of the coast guard searchers were based and orrin liverman is at the pentagon for us. you re getting new information about this top secret at the time navy system that detected this implosion very soon after the sub lost communications. so what do we know tonight? reporter: that s right. a senior navy official tells us that the navy picked up on a sound or acoustic signature that was likely or could have been an implosion or an explosion at about the time the titan submersible went missing and about the location where it went missing. according to that senior navy official, the navy immediately passed that information on to the incident commander and it was then used to refine and narrow down the search area, an incredibly wide area. so why didn t it end the search immediately? this is a crucial question, especially when it was picked up on sunday. that s because the navy official says the sound itself was not
The search for the Titan sub has already cost millions and a recovery operation at such extreme depths would be "prohibitive in cost," an ROV expert said.