Untill now the tripod developed by Cor (Kuyvenhoven,.... sorry Cor B, indeed your name is too common...
...), was only used in cold, green north sea water. Over there, environmental damage caused by a tripod is nothing compared to what any fisherman or wreckdiver does. Every weekend pretty large numbers of wreck-demolition-divers go there to plunder some souvenirs for in their sheds..... But that's another topic. I just want to mention that there are a lot low light places which are not as sensitive a coral reef, but still worth taking an image of and then a tripod can be very useful.
I think that any user of a tripod should be aware of what damage they can cause, but isn't that always the case when you do a dive, also without a tripod? I think it speaks for itself that you don't put a tripod on places where you aren't even allowed to place a finger.
>>>but if you want to take long shutter pics you need also a distance shutter to provide shakeing the setup ..... <<<<
Another option for releasing the shutter for long shuttertime exposure is by using the self timer. That's how i used to do this before i had my D200.
>>>but always the housing has to have a tripod 1/4 " thread in bottom or tray or if not you have to add a plate with the right one.<<<<
As far as i Know Cor K., he's capable of finding a technical solution for any type of housing.
Greetz, Udo