The Master-at-Arms (MA) rating is responsible for law enforcement and force protection in the United States Navy—equivalent to the United States Army Military Police, the United States Marine Corps Military Police, … See more

Authority
The authority of a Master-at-Arms is derived from many sources. Under Title 10 U.S.C., they enforce the provision of the Uniform Code of Military Justice (UCMJ) (10 U.S.C. § 47). Under the Assimilative Crimes Act See more

In October 2001, the Chief of Naval Operations (CNO) designated the commander in chief, U.S. Atlantic Fleet (CINCLANTFLT) as concurrent commander, U.S. … See more

In a naval unit task organized with a Naval Security Force (NSF) department or detachment, Masters-at-Arms report to the commanding officer … See more

The master-at-arms rating is not a modern innovation. Naval records show that these "sheriffs of the sea" were keeping order as early as the reign of Charles I of England. At that time they … See more

According to early records, the U.S. Navy took its time about identifying ratings by the symbols so familiar on today's naval uniforms. The Master-at-Arms, or police officer of the ship, … See more

Because of the multi-faceted duties of a Master-at-Arms, it is not uncommon for a master-at-arms to qualify in various small-arms and large caliber weapons throughout their career. Additionally, master-at-arms may be required to train and qualify in … See more