Misd-agin said: -
Any landing that you can walk away from is a great landing.
In this case they couldn't walk away from the landing. Sooooooo, how do you classify it?
They couldn't swim either, so it's left to the rescuers to help you get away ...
This is a "ferry great landing"!
Alternatively, since no land was involved, this could be a "great watering down".
Or maybe, we should just call them Sullenbergers.