Borut,I've just come to think UIAA grade
IV equates to
YDS 5.55 – nice figures, isn't it?
kamil wrote:One remark - from those many descriptions at SP that I've read I think YDS class 3 is about UIAA I, class 4 is roughly II and 5.0-5.4 is like III.
I know the scrambling route to Gierlach is I UIAA. I found the hardest place of scrambling to Maja Jezerce in Prokletije from south-west of similar technical difficulty and then found an American report grading it as class 3. So I can imagine that scrambling more difficult than this would be class 4, where those not used to it would prefer to rope up, which is exactly the definition of II UIAA for me. III or 5.x is where even most climbers would rather rope up.
Been studying the problem
The way I see it now is
UIAA I = Scrambling (both US and UK
) grade/class 3.5 (i.e. upper 3 or lower 4) = around YDS climbing grade 5.05
UIAA II = upper class 4 (scrambling) = YDS 5.2 (trad climbing) UIAA III = YDS 5.35
UIAA IV = YDS 5.55
UIAA V = YDS 5.75