Vertical Caving — Derek Bristol
Survey Efficiency — Derek Bristol
Descenders — Derek Bristol
Frog Ascending System for Caving - Techniques
Round-Tripping — Derek Bristol
Frog walker, with croll
Survey Efficiency — Derek Bristol
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Drafting — Derek Bristol
Vertical Caving — Derek Bristol
What's your cowstail & ascender setup?
Frog Walker Ascent System