Stockbridge's underwater robotics team will be showing off its expertise in Alpena Thursday at the start of the annual Marine Advanced Technology Remotely Operated Vehicle International Competition. It's at the Thunder Bay National Marine Sanctuary, where 60 teams from 18 states and 13 countries will show off their robots. Stockbridge's team is well known for its skills. It's traveled to the island of Palau near the Philippines three times to search for planes shot down during World War II. A fourth trip has just been approved by the district.