FLR-PSA,
I think the point D-U-S is trying to make is that with all those failures 2 pilots on board would have to navigate visually, keep a damn good lookout, follow comms failure procedures and look out for light signals from atc. or at least something along those lines - certainly leaves a reasonable chance of getting out alive.
no pilots on board, they'd all crash.
i know which one i'd prefer!