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_47 ( ship_type VARCHAR, disposition_of_ship VARCHAR, tonnage VARCHAR )

### Question ###
What is the Ship Type of the Prize Disposition of ship and a tonnage less than 151?

### Accurate SQL ###

SELECT ship_type FROM table_name_47 WHERE disposition_of_ship = "prize" AND tonnage < 151