I've wondering for a long time why we must have manned ships. I do not know anything about ships. I guess the problem is not with navigation: we could have rem

I've wondering for a long time why we must have manned ships. I do not know anything about ships. I guess the problem is not with navigation: we could have remote piloting when needed, from a central place. Redundant communication and all. I believe that the other is that you need to maintain a ship when on sea? Make some small fixes awaiting to be in a harbor? That one does require people for now.