CREATE TABLE table_15 ("#" TEXT, "Shipyard" TEXT, "Laid down" TEXT, "Launched" TEXT, "Commissioned" TEXT, "Fleet" TEXT, "Status" TEXT)

List the # for ships commissioned on december 18, 1965.
SELECT "#" FROM table_15 WHERE "Commissioned" = 'December 18, 1965'
SELECT "#" FROM "table_15" WHERE "Commissioned" = 'December 18, 1965'