U.S. Coast Guard crews were kept busy over the weekend, rescuing 16 people in five separate emergencies in the Bay Area and along the Monterey coast. On Friday, three people were airlifted by an MH-65 Dolphin helicopter aircrew after their 16-foot boat became grounded in mud in San Pablo Bay. Then on Saturday morning, crews from Coast Guard Station Monterey rescued a diver next to the station’s pier after hearing the diver’s distress whistle during morning colors.