The vines spread around the area are surprisingly climbable. The thin ones less so, but you can use

Survivor notes · Milky (SAW-03) · survivor group 4

Survivor notes
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The vines spread around the area are surprisingly climbable. The thin ones less so, but you can use the large ones as natural ladders. Definitely saved me a few fractured legs.

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Written by Milky (SAW-03), one of the Sawian survivors sent into the depths.