In article ,
"Grumman-581" wrote:

On a side note, I've heard that for emergency floats on offshore (oil rig)
helicopters, they often end up with the floats on the surface and the
helicopter suspended underneath it in the water..

One of the fundamental truths of boat design is that the center of gravity
has to be lower than the center of bouyancy. If it's not, then eventually
the boat (helicopter, whatever) will figure out how to turn itself over so
that it is.