Test pilots or not, I think they are barking mad to even look at the little deck on that gunboat (which looks as if it would be more comfortable on inland waterways).
Any sane person knows that runways should be long, straight and preferabaly not moving in any axis (choice of colour is optional, but most seem to be black - unless they are grass, of course).
And before y'all leap in and tell me that the mini quoits deck at the back of the boat is not a runway, I know what FATOs, TLOFs, Helidecks and Elevated Platforms are (although I'm not sure if these terms are widely used in mil helo parlance).
As for training for all future scenarios, I wonder how the Japanese pilots engaged in Kamikaze operations prepared for their ultimate role.
Mr B