Master-at-Arms (MA) provide waterborne and land security, aircraft and flight line security, strategic weapons and cargo security, maritime security and platform protection; conduct customs operations, corrections operations, detainee operations, and protective service operations; perform anti-terrorism, force protection, physical security and law enforcement; organize and train personnel in antiterrorism, force protection, physical security, law enforcement, and weapons proficiency; develop plans for physical security and force protection enhancement of Navy bases, installations, property, and personnel; and assist commands in conducting terrorist threat analysis and implementing defensive measures.