An Ocean Signal rescueME PLB1 was key to saving the lives of two people after a dramatic rescue in the Atlantic Ocean. Sandy Williamson and his crew, Corey, activated their Ocean Signal personal locator beacon when their 22-foot yellow catamaran started taking on water about 20 nautical miles off the Miami coast. The U.S. Coast Guard 7th District command centre in Miami received the emergency alert just after 11 a.m. on Sunday morning (October 27, 2013) and immediately launched an MH-65 Dolphin helicopter to the area.