BOSTON - Coast Guard Station Merrimack River's Petty Officer 2nd Class David Hamilton assists an injured boater on the Merrimack River Aug. 11, 2011. A Coast Guard Station Merrimack River 24-foot Special Purpose Craft - Shallow Water crew helped stabilize the man and the SPC-SW crew safely escorted the boat to Station Merrimack River, where they were met by awaiting EMS and Newburyport Fire Department members. U.S. Coast Guard photo by Petty Officer 1st Class Ben Molnar.