USS Oceanographer (AGS-3) was a survey ship of the United States Navy during World War II that produced charts chiefly of passages in the Solomon Islands area of the Pacific Ocean. Upon transfer to the Navy, she had initially briefly been named and classed as gunboat USS Natchez (PG-85). Before her World War II Navy service, she had been USC&GS Oceanographer (OSS-26), a survey ship with the U.S. Coast and Geodetic Survey from 1930. After putting in for needed repairs in June 1944, Oceanographer, after further inspection, was instead decommissioned in September and broken up for scrap.