Complex sentence: The Marine Physician Assistant (MPA) is a U.S. Merchant Mariner Staff Officer, licensed by the United States Coast Guard National Maritime Center (NMC) located in Martinsburg, West Virginia.
Split into simpler sentences: The Marine Physician Assistant (MPA) is a U.S. Merchant Mariner Staff Officer. A Certificate of Registry is granted through The United States Coast Guard National Maritime Center (NMC) located in Martinsburg, West Virginia.