Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_17026 ( "Ships name" text, "Date entered service" text, "Date withdrawn" text, "Tonnage" real, "Type of Ship" text )

### Question ###
what is the maximum tonnage where date entered service is 25 march 1986

### Accurate SQL ###

SELECT MAX("Tonnage") FROM table_17026 WHERE "Date entered service" = '25 March 1986'