On Wednesday, Musk issued an apology to Unsworth in a reply to another Twitter user. He said: “My words were spoken in anger after Mr Unsworth said several untruths & suggested I engage in a sexual act with the mini-sub, which had been built as an act of kindness & according to specifications from the dive team leader.”
But Mr Unsworth described Musk’s offer to help as “just a PR stunt”.
“He can stick his submarine where it hurts,” he told CNN. “It had absolutely no chance of working. He had no conception of what the cave passage was like.
“The submarine, I believe, was about five foot six long, rigid, so it wouldn’t have gone round corners or round any obstacles.