Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
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?
### Answer:
SELECT date_departed FROM table_name_51 WHERE navy = "royal navy" AND name = "hms leith"