USS LST-851 was an LST-542-class tank landing ship in the United States Navy. Like many of her class, she was not named and is properly referred to by her hull designation. LST-851 was laid down on 10 August 1944 at Seneca, Illinois, by the Chicago Bridge & Iron Co.; launched on 8 November 1944; sponsored by Mrs. Gertrude B. Van Trigt; and commissioned on 30 November 1944, Lt. Leo T. Tyburski in command. The final disposition is uncertain, but it is likely that LST-851 went to Argentina, where she was redesignated ARA BDT-1 (Buque Desembarco de Tanques), and later redesignated Q41.