[EVO X]

And if the people in the submersible had communicated to the mothership that they were attempting to ascend shortly before the implosion occurred, they likely weren’t happy campers before they died.

The submersible had hull sensors, but sub experts I've seen commenting on the implosion didn't think they would give an advanced notice. CF shatters when it fails.

[mewzilla]

There were reports that it was communicated to the mothership that the submersible was heavy and attempting to ascend shirtly before an acoustic event detected moments later followed by no further contact.

If that reporting is accurate, they likely suspected something was very wrong.

The eight hours that passed before ant notification was made is very telling to my mind.

What went on during that eight hours.