The chemical tank ship Silver Dover assists an 80-year-old man in distress aboard the sailing vessel Tao Feb. 4, 2023, approximately 57 nautical miles southeast of Puerto Rico. (U.S. Coast Guard photo). SAN JUAN, Puerto Rico — Coast Guard crews and the crew of the chemical tank ship Silver Dover assisted a boater in distress Saturday morning in the Caribbean Sea, approximately 57 nautical miles southeast...