I would guess the main ramp , Casurina Harbour , used it a few times ,seems deep enough . I think the shallowest is 3mtrs there
I only have a 6mtre ali , so little need for depth

I would avoid the inner harbour boat ramp (Casurina Harbour) at all cost if I were you, it is known to be frequented by the local scooter gang of pale pink trash that will loot your vessel and make you watch, while you rape your wife.

Much better going to the ramp next to the department of fisheries at the end of King road, the blokes and gals there, in their uniforms will deter the scooter gang, they are however not much help when it comes to the local biker gang (the coffee cheaters) that hang out at the nearby parade hotel.

On secong thoughts better if you launch at rockingham and sail down but be carefull to stay out of jetski range as there is a gang of weirdos (said to have moved down from the big smoke) they will board your vessel and make you watch as you rape your self.

Rough place that Bunbury, but you already know that!

Cant use the king road boat ramp coz my mast wont fit under that bridge on the way out to koombana. Same goes for the good ramp at the powerboat fishing club across the inlet from the fisheries.

Cant use the sailing club ramp coz i'm not a member.

Will have to brave casurina making sure not to take my wife and come armed with goon juice and buds to bribe the scooter gang.

8===D