Now, if I hadn't actually seen that instructor demonstrate the *sideways* flip, torquing himself *against* the spraydeck's velcro opening, and *still* managing to wind up inverted rather than just falling out... (mind-boggling!)
There must be an occupant weight threshold, above which the velcro just releases during a flip, as it does for me. For lighter occupants, obviously the velcro has enough resistance to potentially keep them pinned inside the boat after a flip.
Which raises the question, could a less aggressive velcro be incorporated into the spraydeck that would reduce the chances of the occupant flipping with the boat? As we know, the spraydeck isn't intended to support the raft's structural integrity in any way. And it's not intended to be water-tight. Would it matter if it occasionally came part-way loose during aggressive boating, if the net result were enhanced safety against drowning?