Master-At-Arms (MA) perform, conduct or advise appropriate personnel on matters of investigations, interrogations, apprehension, crime prevention, preservation of crime scenes and evidence, enforcement of orders, and regulations, shore patrol, and crowd control; implement, develop, conduct, physical security policy, plans, programs, and assessments; recommend enhancement to physical security of navy bases, installations, property, and personnel; supervise and train security forces in antiterrorism defense and weapons proficiency; assist commands in establishing terrorist threat conditions and implementing defensive measures to combat threat.