This document provides guidance on safety practices for using aerial lifts over water in shipyards. It states that aerial lifts are commonly used in shipyards when erecting staging is impractical, but that boom failure, tipping over, falls, and ejections can occur if not properly operated. It outlines requirements for employers to provide safe equipment, training, fall protection, and rescue assistance. It provides numerous safe work practices for operating lifts safely, such as always tying off, not exceeding weight limits, avoiding overhead power lines, and taking precautions to prevent tipping over like setting brakes and extending outriggers. It emphasizes that personal flotation devices alone are not sufficient fall protection from heights over 40 feet.