https://www.kcra.com/article/what-we-kno...e/44264641#
What we know about the missing Titanic-bound submersible
With no GPS underwater, the submersible is only guided by text messages from the surface ship. On Pogue’s trip, communications broke down during a dive and the submersible was lost for over two hours, he said.
The pilot steers the sub using a video game controller – but if that fails, a hard-wired system can control the propellers, according to Aaron Newman, who took the dive on the Titan in 2021 and is now an OceanGate investor. Thrusters are powered by an external electrical system, while an internal system powers communications and a heater, he said.
Have there been safety concerns before?
The incident has prompted discussion around the safety of deep-sea tourism, with some pointing out that OceanGate has come under criticism before.
Two former OceanGate employees separately brought up similar safety concerns about the thickness of the Titan’s hull when they were employed by the company years ago.
A statement from a research lab also appears to show conflicting information about the engineering and testing that went into the development of the vessel.
OceanGate’s legal representative boasted the Titan’s “unparalleled” safety features in a 2021 court filing, saying it had been built with the University of Washington’s Applied Physics Laboratory – but the university said the lab had never dealt with the design, engineering or testing of the Titan.
Industry leaders also expressed concerns five years ago about the company’s “experimental approach” to the Titan submersible and its trip to the Titanic, the New York Times reported Tuesday.
The Manned Underwater Vehicles committee of the Marine Technology Society said it penned a letter to Rush, the missing CEO, in 2018. The group warned of potential “negative outcomes (from minor to catastrophic) that would have serious consequences for everyone in the industry,” said the letter obtained by the Times.
OceanGate has not responded to a request for comment on the letter, or on the two former employees’ claims.