I’ve modified the Maritime chart of the Pittwater area with the racing marks added which you can download from the link below.
https://www.dropbox.com/s/uf2qozmyrh98oxq/pittwater_weta_chart_A3_V2.pdf
There’s a smaller version here but you may find it difficult to read the detail.
https://www.dropbox.com/s/5qr2pjtawe9lsrv/pittwater_weta_chart3.png
I have a KML file available with the marks as waypoints for anyone who uses a GPS or iRegatta.