A five-person tourist submarine went missing during a dive to Titanic's wreck on Sunday. The submarine named Titan operated by OceanGate Expeditions offers tourists an up-close look at the wreckage of the Titanic. &nbsp;<br />”<br />”According to officials, The submersible began its descent on Sunday morning but lost contact after about an hour and 45 minutes into its descent.<br />”<br />”Meanwhile, U.S. and Canadian ships and planes started searching for the submarine on Monday. Government agencies, the US and Canadian navies and commercial deep-sea firms are helping in the rescue operation.<br />”<br />”The U.S. Coast Guard said that there was one pilot and four passengers on board.<br />”<br />”A submarine and sonar buoys were involved in the search for the vessel. However, it is unclear whether it is still underwater or had surfaced and was unable to communicate.<br />”<br />”<span style="color: #222222;">Titanic's wreck lies some 700km south of St John's, Newfoundland. Though, the rescue mission is being run from Boston, Massachusetts.</span><br />