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_51 (date_departed VARCHAR, navy VARCHAR, name VARCHAR)

### Question ###
What's the departed date that the HMS Leith of the Royal Navy?

### Accurate SQL ###

SELECT date_departed FROM table_name_51 WHERE navy = "royal navy" AND name = "hms leith"