The submarine-like vessel that imploded at the bottom of the Atlantic while on a mission to view the Titanic shipwreck had a "critical crack" and "electrical failure", an expert has said.
He has revealed why he thinks the sub, named Titan, had a catastrophic failure which claimed the lives of five earlier this month.
Dr Graham-Jones, Associate Professor in Mechanical and Marine Engineering at the University of Plymouth, said that parts of the vessel could have begun to leak which may have caused an electrical disaster.
