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_17554 ( "Class" text, "Ship Name" text, "Origin" text, "Hull Numbers" real, "Service years" text, "Previously" text, "Note" text )

### Question ###
what is the maximum number of hull numbers?

### Accurate SQL ###

SELECT MAX("Hull Numbers") FROM table_17554