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_81 (operator VARCHAR, berths VARCHAR, depth__m_ VARCHAR)

### Question ###
Name the operator with berths more than 1 and depth of 12.5-15.5

### Accurate SQL ###

SELECT operator FROM table_name_81 WHERE berths > 1 AND depth__m_ = "12.5-15.5"