USS_Block_Island_(CVE-21)

USS Block Island (CVE-21/AVG-21/ACV-21) was a Bogue-class escort carrier for the United States Navy during World War II. She was the first of two escort carriers named after Block Island Sound off Rhode Island and was the only American carrier sunk in the Atlantic during the war.
Originally classified AVG-21, she became ACV-21 on 20 August 1942, and CVE-21 on 15 July 1943. She was named after Block Island, an island in Rhode Island east of New York.