Editing Yosemite Decimal System (section)

== Protection rating ==
In 1980, Jim Erickson introduced an additional rating for [[traditional climbing]] routes where the level and quality of the [[climbing protection]] are assessed.<ref name=FoHGrading/> The letter codes chosen were, at the time, identical to the [[MPAA film rating system|American system for rating the content of movies]], except that there is no commonly recognized distinction between PG and PG13:<ref name=FoHGrading/><ref name=CAI/><ref name=Rockfax>{{cite web | website=Rockfax Publishing | url=https://rockfax.com/climbing-guides/grades/ | title=Grade Conversions: Alpine Grading System | accessdate=2 September 2023 |date=2022}}</ref>

{| class="wikitable"
|-
! Code
! Description
|-
! G
| Good, solid protection.
|-
! PG
| Adequate protection. Falls will not be long
|-
! R
| Inadequate protection: potential for long fall, leader will likely suffer injuries
|-
! X
| Protection is unavailable or so sparse that any fall is likely to result in death or serious injury.
|}