Here's another one from Friday, tide was low, and I was going for my run just before the last pipe, if you stay close to the pipe you cam miss Claude's rock, some of my runs ended up heading straight for it, so my tracks either abort or go either side of it.
So I fairly confident the end of the ruler is where the it is. I had the mouse pointer over that spot, so the coordinates at the bottom are for that rock/reef.
So you can see that light patch where Neb's and hardies impacts are, between there and my mark are rocks at various depths, most are OK at high tide with a 20cm fin when planning. But the one hardie hit is going to be a danger at any tide.
(Edit) just had a close look at the pic, and there's a light spot a bit to the right of my mark, this is probably it, cause where I've marked looks fairly dark, (seaweed).