Figure 6.
Instances of vertical and horizontal rope installation. (a) Installation of vertical ropes, and (b) handrails to facilitate safe access for researchers.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.