Why would there not be double, triple, even quadruple redundancy for a locator beacon? And if there was, how could each system have failed? Hoping for a speedy resolution for these people, and the best possible outcome.
All those switches covering the walls of the Alvin sub (or any other real scientific submersible for that matter) are there to control every aspect of the sub at a hardware level. It doesn't look like the Titan had that level of control, at least not accessible quickly in an emergency.
There isn't a LOT that could happen that wouldn't lead to either them surfacing pretty rapidly, or imploding almost instantaneously.
https://www.washingtonpost.com/world/2023/06/20/inside-titan...