What is more dangerous, recreational scuba diving or snowmobiling?

[Andrew1]

Being that both of these are in my top 3 most addictive hobbies (flying is #1) how would you compare the safety overall of snowmobiling to rec diving---lets say no deeper than 80-100 feet and always in open water where you can ascend directly to the surface.

I guess the best measurement of comparison is the number of fatalities per hour of participation in each activity. My dive instructor thinks hands down that snowmobiling is much more dangerous than even technical diving, let alone rec diving (which I find very surprising) so I wanted to get your thoughts too.

 

[archer]

Most sports have inherent dangers for those who do them without proper training or supervision. One can smash into a tree or get the bends but both can be safe and enjoyable sports. It is when one pushes to the limits of their ability and training that one ends up hurt.