I was in Gnaraloo last year and saw a couple of guys prone foiling. Omg they were fast. I was on a stand up paddle board. The reef out is shallow and you will have to turn your board upside down to get out. It is quite a distance of shallow reef but once out there it is quite deep enough for even a 900 mast.
Is Mr.Merc, riding hi own brand under the water? Must be some good riding going on all over the West, Geraldton lighthouse area would be fun and so many other spots.