alot of people are asking about this vfr ifr thing. i'm not working for the german regulatory. but it seems like good sense that visual conditions (Visual Flight Rules), i e out of the clouds and 1000 feet (or whatever) separation from those clouds, be applied. I wouldn't like to run into a little nimbostratus knowing that it might or might not contain VA. better to stay out and away from it. I'm not saying it's unsafer but VA is one thing (I guess you might be able to see a big concentration) but VA + water might be another thing completely.
please, no nonsense about flying vfr as in following rivers and country roads to known landmarks before looking at the airport's wind sock!