Condolences to the families.
I was on a small boat on the Ningaloo reef once and the skipper had taken his eyes off the incoming waves for a moment and by the time he checked we had drifted closer to the reef break and were side on to a large wave not far off from breaking
He just had time to gun the throttle and ride up and over or we would have been in serious trouble. It only takes a second for things to go wrong in that kind of environment so take care out there.