USS Brontes was a Portunus-Class Motor Torpedo Boat Tender in service with the United States Navy during World War II.

Brontes, although reclassified AGP-17, 14 August 1944, was launched 6 February 1945 as LST-1125 by Chicago Bridge and Iron Co., Seneca, Ill.; sponsored by Mrs. June Elizabeth Reimer; and placed in reduced commission 17 February 1945; placed out of commission 10 March 1945; underwent conversion to a motor torpedo boat tender; and recommissioned as Brontes (AGP-17) 14 August 1945.

At New Orleans she participated in the Navy Day activities and then remained to service torpedo boats.

In December 1945 she sailed to Washington, D. C., to participate in the "parade of torpedo boats" held in conjunction with a Victory Bond drive.

In 1948, she was resold to Mineral Transport Corporation in Liberia, renamed M/V Diane, and reflagged Liberian.