Initially, the Naval Sea Systems Command (NAVSEA) provided Landing Craft Air Cushion (LCAC) crews with medical requirements for both selection and operational use in the 'Safe Engineering and Operations (SEAOPS) Manual for Training Standardization and Evaluation of Crewmember Qualification, Landing Craft Air Cushion (LCAC).' However, the medical requirements were vague and could be loosely interpreted by medical authorities screening personnel for LCAC crew candidacy. Factors that led to the need ...