I should’ve been more clear. The helicopters could be 100 feet apart. Each helicopter would hook on to the corner of each container, and pull away diagonally.
The lift capability of this setup is from the y axis. But at a reduced load. This is a physics problem.
There are between 6 000 to 20 000 containers on this ship.
Thou reduce weight any meaningful amount you would need to remove hundreds or even thousands of containers.
I am not even sure if anyone would be willing to fly 4 helicopters tethered to each other, but even if they do, its going to be very slow for safety reasons.
And good like finding insurance company that is willing to cover, if anything goes wrong.
And enough pilots and helicopters, to do that 24/7 for a few months