how far down do the subs go

Question: how far down do the subs go
- Keywords:
  machines,
  ocean,
  submarines
Asked by sherlock to Ryan on 15 Jun 2011.
- Ryan Ladd answered on 15 Jun 2011:
  
  The submarines in my lab are only prototypes so they don’t usually go any deeper than our 1.5 meter deep swimming pool! One day though, I hope they will be used in the ocean and swimming as deep as any other submarine.
  
  Submarines with humans inside rarely go below 100 meters but the record, I believe, is around 1000 meters deep! Robotic submarines though have almost no limits and can go into the deepest of oceans.

Question: how far down do the subs go