CREATE TABLE table_203_547 (id DECIMAL, "ship" TEXT, "built" DECIMAL, "in service for cunard" TEXT, "type" TEXT, "tonnage" TEXT, "notes" TEXT)

according to the chart what was the last ship built ?
SELECT "ship" FROM table_203_547 ORDER BY "built" DESC LIMIT 1
SELECT "ship" FROM "table_203_547" ORDER BY "built" DESC NULLS LAST LIMIT 1