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_name_33 ( launched VARCHAR, commissioned VARCHAR, bow_number VARCHAR )

### Question ###
When did the ship commissioned in November 1975 with a bow number of ps-18 launch?

### Accurate SQL ###

SELECT launched FROM table_name_33 WHERE commissioned = "november 1975" AND bow_number = "ps-18"