Was Titan Sub's Building Material The Problem? Read What James Cameron Said

Explorers, including James Cameron, had sounded the alarm earlier with the filmmaker saying he had found the hull design risky.

The fatal accident aboard the Titan submersible, which was on its way to the Titanic wreckage, has once against brought the focus the need for additional safety regulations. The concerns are being raised after the use of carbon fibre hull in the submersible, which was meant to go to the depth of 3,700 metres. For vessels that undertake expeditions like these, the preferred material is titanium, as it is elastic and can readjust to different pressures below and above the sea. But titanium is expensive compared to carbon fibre, prompting the CEO of vessel operator OceanGate to go for it.

All five people aboard the Titan were killed when the submersible imploded. The accident led to the launch of a multinational search and captured the world's attention.

Also Read | Three Other Subs Visiting Titanic Almost Suffered Same Fate As Titan

Industry experts say they were the first known fatalities in more than 60 years of civilian deep-sea submergence.