I am in Sydney so feel free to get in touch for a ride around Port Hacking, Botany Bay or Sydney Harbour.
In the last few months the RTA that looks after our roads has taken over Maritime which used to be a separate body. So now look on rta.nsw.gov.au
What you are after though is on the old site here http://www.maritime.nsw.gov.au/cv/recog_certs.html
You do realise July is the middle of our winter. It might drop to only a couple of degrees over night. Could probably still go boating though during the day.