Very clever work. Masterful! They must do it regularly by the looks of it. Using the ferry as its own breakwater. Nice! Notice it isn't snowing! I am guessing the water is a little warmer than the Gulf of Maine. Seems like the Greeks have been practicing for a few THOUSAND YEARS!
I can't help wondering about the evolutionary history of this maneuver.
"Do you think I am ready, Sir?". "Sure son, no sweat! Back 'er down and give it a go!" I wonder if they set a kedge?
Perhaps a bollard off the bow somewhere? Probably not. Just good seamanship and good equipment.
They probably don't try it in bad weather!