CREATE TABLE table_204_522 (id NUMBER, "boat #" CLOB, "name" CLOB, "builder" CLOB, "laid down" CLOB, "launched" CLOB, "completed" CLOB, "fate" CLOB)

when was a boat launched immediately before ha-206 ?
SELECT "name" FROM table_204_522 WHERE "launched" < (SELECT "launched" FROM table_204_522 WHERE "name" = 'ha-206') ORDER BY "launched" DESC LIMIT 1
SELECT "name" FROM "table_204_522" WHERE "launched" < (SELECT "launched" FROM "table_204_522" WHERE "name" = 'ha-206') ORDER BY "launched" DESC FETCH FIRST 1 ROWS ONLY