Mmmm ....
Sven ... old darling .....
The difference between landing a 139 or a 412 on the (theoretically) same pontoon would be non existent ..... if anything the 139 would be less likely to move once on the deck ... the skids on the 412 and the aerodynamics of the airframe can make deck landings "interesting" depending on where the wind might be, and the level of handling skills of the driver!
.... also the 139 is also way less likely to 'resonate' once on the deck the u/c is brilliant!
