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_20854943_2 ( sail_number VARCHAR, skipper VARCHAR )

### Question ###
How many sail numbers for boat skippered by Geoff Ross?

### Accurate SQL ###

SELECT COUNT(sail_number) FROM table_20854943_2 WHERE skipper = "Geoff Ross"