Something I've wondered about is if you cut the bridges/tunnels into Manhattan how long you could keep it Berlin Airlift-style supplied for, or alternatively evacuate it before it starves.
I guess you could use the Staten Island and those new dinky ferries, but are there even still enough docks (and properly sized vessels) to matter?
>@youzicha said: if this is an anime, I suggest that we resurrect the USS Intrepid in our time of need, like the Yamato
The real question is if the Brooklyn Navy Yard still has the capacity to weld floating tubs together fast enough