Tyler goes underwaterat the Monterey Bay Aquarium Research Institute in California where he uses a remote-control operated vehicle called a ROV and explores the largest submarine canyon on the continent's West Coast. With deep sea depths reaching more than 10,000 feet, Tyler assists scientists in the search for never-before-seen life forms at the bottom of the ocean floor. Tyler receives a diving suit that weighs a full ton, and after securing his oxygen supply, he accompanies underwater welders. He'll find out how this unique skill is used to repair pipelines, drilling rigs, ships, barges and even nuclear power plants and how some amazing tools can produce enough heat to melt steel even in the icy cold temperatures of the ocean. After all of Tyler's adventures, he goes to Jules's Underwater Sea Lodge, which is a hotel underwater! Built in a lagoon some 30 feet underwater, the Lodge has only four rooms each with its own supply of air sent down from the surface using an umbilical cord