RB 80

[Dirk Diggler]

Please feel free to correct me if I'm wrong, but doesn't the RB80 have manually controlled check valves on the dil/o2 supply lines that the diver themself can manually turn on and off? What I didn't like about the unit was that if the diver was in a tight squeeze where the environment contacted and turned, or the diver reached for the wrong knob and accidently turned the wrong valve, a serious problem to have to deal with might occur? These lines are simply coated red and green, and to me could be very hard to distinguish in low light, low vis. Other than not relying on computer controlled inspiration or voting logic, I don't see how these possible diver or environmental error-prone valves could be considered DIR?

Please feel free to better educate me.