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5
votes
1answer
184 views

Minimum safe rappel rope diameters?

9mm is considered minimum for a vertical rappel with a nylon or polyester kernmantle rope, 6mm with high strength aramid, but what if your rappel isn't vertical? What's the minimum safe rope diameter ...
7
votes
1answer
205 views

Headlamp with open flame

I just saw a documentary where they investigated lakes inside of glaciers. They rapelled in big crevasses and even dived in those sometimes huge water reservoirs. The scientist had a regular looking ...
5
votes
1answer
226 views

Good places to go potholing in the UK

A long time ago when I was about 10 I went potholing on a school trip in Devon, and despite mild claustrophobia I found myself eventually enjoying it - egged on brilliantly by my friends. I hadn't ...
7
votes
2answers
222 views

Semi-static rope 24 hour rule

It is said that a semi-static rope should be submerged for 24 hours before first use. Why is this, and is this before every first use ?
4
votes
1answer
339 views

What temperatures can I expect in caves compared to surface?

If the daily air temperature is between 0 °C to 14 °C, what sort of temperature would be found within caves? Will it be any colder or warmer? The caves in question (Wombeyan) do not go terribly far ...
12
votes
3answers
218 views

What precautions are needed for caving

I have been hiking/mountaineering for quite a few years now. But, I have never been into a deep cave as yet. We are planning to explore a natural cave that we'll have to rappel into. The cave is ...
5
votes
1answer
273 views

Why can't a Figure-of-8 descender be used for SRT?

I've been told that a Figure-of-8 descender cannot be used for SRT (single-rope technique) because the descender must be able to be removed from the rope, without being removed from the harness. Why ...
10
votes
2answers
1k views

what boots are good for caving?

considering the following options: watertight (since caves are often wet or muddy) stiff sole: to provide more grip and protection from the rocky bottom. durability What is better a rubber boot or ...