ATPL HUF Question- Heavy Rain
Just a quick question I'm having a little trouble deciphering in my human factors study.
In low visibility, ie heavy rain, snow, fog etc. The pilot will believe that he is too low on the approach.
However, in heavy rain, the windscreen itself is further refracted by the rain (up to 5º estimated). This gives the pilot the perception of being too high on the approach.
My question is, what actually happens in the scenario of flying an approach in heavy rain? One would have to assume that low visibility is a given in nearly all scenarios involving heavy rain, which makes it even harder to understand! Any ideas?