Cargo for Foula

How do you get a car or van to the Island of Foula?
Lifted on by a crane using a net onto the ferry New Advance at the Walls pier.

I would like to have seen it come off when it arrived in Foula. Due to the sea conditions and no natural harbour the boat is lifted out of the sea by crane. Would the van then be taken off or is it taken off first?

Only been to Foula once in the 1980's which was some experience.