>IIRC the Navy did a couple studies after a rash of collisions and other ship casualties. The net result was to shorten the shifts in certain critical command/control positions - Officer of the Deck, Navigator, helmsman, Weapons Officer, etc.

Perhaps the takeaway really is that we need to invest significant resources into developing better procedures for hand offs that mitigate the negative consequences of them. Then we can shift the equilibrium closer to optimising for the first order effects of shift length itself.