Top to Bottom Iceberg

This came from a Rig Manager for Global  Marine Drilling
in St. Johns  , Newfoundland. They  actually have to divert the  path  of these  things away from the  rig by towing  them with ships!  Anyway, in this particular case the water was calm and the sun was almost directly  overhead so that the diver was able to get into  the water
and click this  picture.  They  estimated the weight at 300,000,000  tons.

Thanks N!