Merchant Mariner Medical Manual - COMDTINST M16721.48 (August 2019)

PURPOSE. This Manual provides guidance for evaluating the physical and medical condition of applicants for merchant mariner medical certificates. The guidance in this Manual should assist medical practitioners, the maritime industry, individual mariners, and U.S. Coast Guard (hereinafter, Coast Guard) personnel in evaluating an applicant's physical and medical status to meet the requirements of References (a) through (d).