Alpine-grade
DerecelendirmeTanım:
Part of the alpine climbing system for grading the technical difficulty of alpine climbing routes, which goes: F ("facile/easy"), PD ("peu difficile/little difficult"), AD ("assez difficile/fairly hard"), D ("difficile/difficult"), TD ("très difficile/very hard"), and ED ("extrêmement difficile/extremely difficult"); ED then goes ED1, ED2, ED3, etc.