@Cubs2jets
"Jeff Skyles NOT pressing the "Ditch Switch" had absolutely no affect on the sinking of 1549. Pressing the switch would have closed the two outflow valves on the Aft Pressure Bulkhead. The fact that nearly 25% of the APB was ripped out negated his actions or lack there of."
The aft Pressure Bulkhead is effectively in two parts, above the floor, and below it. The dump valves communicate with the cabin, the damaged portion with the hold. If the APB (cabin portion) was undamaged, and not leaking into the cabin, the open valves would allow water ingress. If the valves had been closed, there would have been less water in the cabin, and the a/c would have remained afloat longer, No? Or, are we looking through the APB directly into the cabin and looking at a seat?
Bottom Line? Should the valves have been closed by crew? Yes.