Garden Island microgrid, page-3

"The sites being considered by Carnegie include an expansion of the Garden Island project, although into deeper waters, and another site on the western side of Rottnest Island, also near Perth."

http://reneweconomy.com.au/2014/car...sland-uk-for-next-generation-wave-sites-40543

Instead of being one or the other, they might be at both.  Except the project at Rottnest Island would be managed by someone else.  

Perhaps there will be cables running to both GI and RI from the CETO 6 array when it gets built.