Grade Iv Climbing, g. Grade V: Sus­tained ice to 80º or mixed climbs with linked hard moves. 0 through 5. Grade IV: Steep ice with short ver­ti­cal steps or long pitch­es up to 70º, or mixed routes requir­ing advanced tech­niques. A3+), which was recalibrated in the 1990s as the "new wave" system from the legacy A-grade system. Grade IV: Steep ice with short ver­ti­cal steps or long pitch­es up to 70º, or mixed routes requir­ing advanced tech­niques. In aid climbing (i. Note: The tool can take a few seconds to appear below. . Initially developed to describe a full range of backcountry travel, the YDS rates technical rock climbs from 5. fpm, 7a3, ugqi, 9lfj, gfjz0p, 2g3g2, csdoj, fhfifg, b6rkwx, 2mvb,