You Can Build Yourself A Sophisticated Deep Sea Diving Suit

But you can't add an axe to one of the arms so you don't have to actually CARRY an AXE which will chop NOTHING under the water. No way an Ocean Robot can generate enough FORCE to make the axe even useful at all. Not with those lunch lady arms. You would think an engineer would understand that. Maybe he's just delivering the axe to a deep sea research station.