American Maritime Officers (AMO) is a national labor union affiliated with the Seafarers International Union of North America. With an active membership of approximately 4,000, AMO represents licensed mariners working in the United States Merchant Marine aboard U.S.-flagged merchant and military sealift vessels. AMO holds a unique presence in the international energy transportation trades. AMO has pioneered new job opportunities for American officers in the international fleet. AMO officers work aboard international liquefied natural gas (LNG) carriers operating worldwide.