I don't think it is absolutely necessary for divers to be on the platform while in motion ( on most dive sites) , but on the other hand, I really don't like the idea at all that an accident like the horrible one that just occurred, would have an effect on practices which have not caused accidents for 30 years.
I don't hold to the school of thought, that it always has to be someone else's fault...that it can never be just unfortunate that a person had an accident.
I still believe absolutely, that if I jump into the water before the captain tells me to, then I am in the wrong, and can't blame the platform issue for the bad drop. So I listen very carefully to the divemaster and Captain, and take this "entrance to the water moment", as a very serious element of the dive, that has to be perfect. I always am certain of the dive command, before jumping in...this IS common sense.
Let's say there is a spectacular coral cave, with a huge jewfish living in it, on a 100 foot by 50 foot patch of coral we know of. The current is running at 2 knots. I want my ultra cool shot, a friend of mine with me, wants to be able to see this place, because it has been talked about so much ( there is such a place).
The current "may" be exactly north...or, it may be headed at a 30 degree angle east of pure north...you can't really tell as you approach the site, with the wind going an entirely different direction. I can stand on the platform with my buddy, the captain can make a big circle and intersect over the edge of the patch at the area he expects will be the upcurrent edge ( not something anyone can be sure about--you can even have different current directions on the bottom, from the surface). When he sees he has hit the edge, he reverses engines to hit a complete stop over the edge, or to back up maybe ten feet...then shuts down or idles and calls the DIVE Command out, with NO doubt whatsoever of this being the correct instant to jump in, BC emptied of air, and begin swimming down at flank speed, even before hitting the water
.....At the bottom almost exactly over the feature the captain wanted us on, we end up with a perfect drop...This is a place where the "rubber duck" style divers, that jump in to the water in straggling groups, spread out by over a minute, floating, and slowly descending, would be no where near the coral cave feature, and probably no where near any part of the reef itself( probably over sand--which in my book, they deserve; I CAN'T STAND TO SEE DIVERS FLOATING ALONG ON THE SURFACE FOR A MINUTE BEFORE
DESCENDING !!!ARGH!!#%!!!! To me, this is the worst style of diving. It is possible in areas where zero current exists, but it is retarded as a standard method of ocean diving. Check your guages while you are on the boat....Stay with your buddy durring the fast descent, check everything you want at the bottom...If you are handicapped by a bad sinus, why should your medical impairment, screw up the optimal practice for all the healthy divers? I say, let the healthy divers go down the RIGHT way, and the medically impaired can try to hit from a long slow drift in--but they will not have the success rate in perfect drops, that a healthy diver will have. Period.
In other words, should some bogus law be enacted to prevent captains from being able to run with divers on the platform, it would mean destroying good drop potentials in challenging areas , and missing out on spectacular dives. Forget it....People need to take responsibility for their own actions. And some times a tragic accident, is just a tragic accident, and NOT something that needs to change existing laws and practices.