USC’s Catalina Hyperbaric Chamber and Wrigley Institute for Environmental Studies, Catalina Conservancy Divers are proud to host this 36th annual event. This is the only time scuba diving is allowed in Avalon Bay, with 500+ expected volunteer divers collecting trash and debris. Awards ceremony follows on Wrigley Stage with prizes & giveaways. Proceeds benefit the USC Hyperbaric Chamber and the Wrigley Institute for Environmental Studies Scientific Diving Program. Catalina Hyperbaric Chamber.