Watch: Titan sub mission specialist breaks down at inquiry

A member of the Titan submersible's support vessel has broken down while giving evidence to an inquiry into what went wrong during the sub's voyage last year.

"I knew what I was doing was very risky," said Renata Rojas during an emotional session. But, she said, "I never at any point felt unsafe."

During Thursday's hearing, the inquiry heard from another witness that Titan had malfunctioned days before its final dive - when it imploded while journeying to the Titanic shipwreck.

The hearings continue into next week.