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_40 ( class VARCHAR, capacity VARCHAR, navigator VARCHAR )

### Question ###
What class has a capacity smaller than 3384 for Ferguson?

### Accurate SQL ###

SELECT class FROM table_name_40 WHERE capacity < 3384 AND navigator = "ferguson"