CREATE TABLE table_204_568 (id DECIMAL, "pennant" TEXT, "name" TEXT, "hull builder" TEXT, "ordered" TEXT, "laid down" TEXT, "launched" TEXT, "accepted into service" TEXT, "commissioned" TEXT, "est. building cost" TEXT, "fate" TEXT)

the arrow was ordered on november 11 , 1971 . what was the previous ship ?
SELECT "name" FROM table_204_568 WHERE id = (SELECT id FROM table_204_568 WHERE "name" = 'arrow') - 1
SELECT "name" FROM "table_204_568" WHERE "id" = (SELECT "id" FROM "table_204_568" WHERE "name" = 'arrow') - 1