Watch the video. I wouldn't assume they had any sort of backup systems/redundancy, contingency plans, or anything else. The whole operation and the submersible are almost comically inadequate in every way.
Ya, I have that sense as well, my statement was more of what should be the case and can be the case engineering wise, not what actually is.
Again as it is supposed to surface automatically on a power loss such a surface can literally result in the boat being many miles away, not having a finder on it is negligence if that is the case.
As we are seeing though, there appears to be a lot of opportunity for negligence in this craft.