I get that, but a 350 m floating pontoon just for the passengers to disembark?
I presume you have to tie up the bow and stern, hence it needing to fit. You can't just tie it up with a poxy little rope to the bow and hope for the best. There are probably variants on disembarkation points on all the different ships too, some near the stern, some in the middle and some near the bow.
I haven't got a clue really.