MS Transpet was a tanker of United States and Panamanian registry. Laid down as MV Avoca and acquired by the Maritime Commission (MARCOM) on a loan charter basis and renamed USS Petaluma (AOG-69), she was to be a type T1 gasoline tanker built for the US Navy during World War II. She was named after the Petaluma River, in California. Petaluma (AOG-69) was never commissioned into the US Navy.