you could use the chaos coil to surface.
save.
controll all party:
go to Pandora island


try using the car and bookmark to crush lock
(put bookmark of eternety 10 inch above ground
put the lock of the box on bookmark, just put it in front of it
use car to crush lock, like remove the chaos coil from the front of the car ( likely it is going to be stuck on the front bumper )
place the lock and bookmark in front of the spring. let Araches drive in full reverse the spring should move the car forwards as you try to go backwards and will crush the lock with the force of a 256 cylinder engine at full throttle. (dont forger to try and not chrush the lock so it willl add extra precision on crushing)