Water Bird
Having taught on the water bird in the USN, the one thing that always struck you was how far the a/c sank into the water on landing and thus how close to the swell the rotors were, even in a sponson fitted SH3-D. I would suggest in many cases, therefore, you are not in control of your destiny re which way you roll unless you have a very slight sea state and the gearbox is still lubricated!
The other weird part was due to tail rotor thrust the a/c will not taxy in a straight line on the water..