CREATE TABLE table_11662133_3 (tonnage INT, date_entered_service VARCHAR)

what is the maximum tonnage where date entered service is 25 march 1986
SELECT MAX(tonnage) FROM table_11662133_3 WHERE date_entered_service = "25 March 1986"
SELECT MAX("tonnage") FROM "table_11662133_3" WHERE "25 March 1986" = "date_entered_service"