Great beach there guys and the yachts look great too.
Looks like it has a certain amount of rutile in it which would tend to make it quite firm.
I spent a couple of years at New Plymouth a long time ago. Some of the beaches over there are totally black and so dense you don't leave footprints.

Edit:- I think the advent of the mini yachts is what the sport has been crying out for. They certainly can't be beaten for convenience.