two quad 40 mm AA gun mounts USS Silenus (AGP-11) was a Motor Torpedo Boat Tender in service with the United States Navy during World War II.

LST-604 was decommissioned on 29 April 1944, at Maryland Drydock Co., Baltimore MD.

for conversion to a Motor Torpedo Boat Tender.

It lasted 104 days, the now USS Silenus, was recommissioned on 9 August 1944.

During World War II, USS Silenus was assigned to the Asiatic-Pacific Theater.