Just for the sake of discussion, what jurisdiction has recognized/ accredited whytcliff as a park?? Just to use a squirt-gun of diesel on the fire, remember the mess surrounding Kelvin and the regulations they tried to place over the foreshore?? AFAIK, If the "parkness" is ceded by W.Vancouver Parks ONLY (as I seem to remember the shore park as being), then there is a potential problem with jurisdiction over legally controlling the rights of passage for vessels in the bay... Perhaps we need to look into this matter a bit since WV only has jurisdiction down to High High water and beyond that is typically federal unless it is already granted marine park status.
That said, the provincial park @ Porteau is a safer place since it is clearly marked both physically by buoys and by chart notation that shows up all paper Navigation and GPS e-charts... NO EXCUSES for anyone to say oops.
With the sheer volume of divers in general, and more specifically those in training, coupled with the generally accepted practice of not running dive flags in that park, we really ought to make certain the area is recognized both generally and officially. What would the individual instructor's professional liability be if a student had gone up under that boat and been injured?? No outward indication of that being a protected area and no diver down/ alpha flags... who gets/wants to own that problem??
[/rambling mental drivel]