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_52909 ( "Ship" text, "Date Commissioned" real, "Gross Tonnage" real, "Propulsion" text, "Material" text )

### Question ###
Tell me the lowest date commissioned for iron rmsrhone and gross tonnage less than 2,738

### Accurate SQL ###

SELECT MIN("Date Commissioned") FROM table_52909 WHERE "Material" = 'iron' AND "Ship" = 'rmsrhone' AND "Gross Tonnage" < '2,738'