An Aviation Survival Technician (AST)-better known as a rescue swimmer-stands suited in full cold weather gear on the tarmac of Coast Guard Air Station Cape Cod, Mass. Rescue swimmers undergo rigorous and highly demanding training before they qualify to be ASTs. They are also certified as emergency medical technicians. Additionally, they must learn and be proficient in helicopter operations and maintenance and rescue equipment. US Coast Guard Art Program 2023 Collection, Ob Id # 202333, Suited up for cold water, Jim Smith, Watercolor, 18x14.5 inches.