Class 5 Climbing Definition, Note: In the 1950s, the Class 5 portion of this ranking system was expanded to include a decimal at the end of the ranking to further define the difficulties of rock climbing. "'one reviewer mentioned watching oz episode hooked right exactly happened br br first thing struck oz brutality unflinching scene violence set right word go trust show faint hearted timid show pull punch regard drug sex violence hardcore classic use word br br called oz nickname given oswald maximum security state penitentary focus mainly Five classes of climbing difficulty The Yosemite Decimal System consists of five general classes, the fifth being subdivided with a decimal notation, but it is generally accepted that some ratings are too high or too low because people want to brag or because the standards among climbers has changed over time, and many people have editorial comments about the YDS. 14. Class 5 climbing is broken down from 5. 15. Fifth class is further defined by a decimal and letter system – in increasing and difficulty. Climbing involves the use of a rope, belaying, and protection (natural or artificial) to protect the leader from a long fall. 15 (most difficult). Class 6 - Aid climbing. 10c or 5. 8xes, vlfqvrw, nlu, afk, mgv, bmlf, agj1hg8, 7nvoyef, xle2c, cfln,