Did initial delays in communication hamper tourist sub search?

About an hour and a half into its voyage, a missing submersible on an expedition to view the wreckage of the Titanic lost communications. It would take another nine hours before the Canadian research icebreaker Polar Prince, which was supporting the Titan, reported it missing to the Coast Guard and sparked an international search effort. It remains unclear why there was such a time lag. But with the submersible passing the critical 96-hour mark when breathable air could have run out, questions about whether a faster initial response could have bolstered the rescue effort.