Rappelling is statistically the deadliest moment in climbing. Do it safely: knots in the rope ends, a prusik backup, an anchor check and controlled descent.
## Introduction Straight talk first, because your life is on the line here: rappelling is statistically one of the deadliest moments in climbing. Rappel errors are behind about 15 % of fatal multi-pitch accidents. The cruel part: it often happens at the end of the tour, when the difficulties seem over and focus slips.
Why rappelling in particular? Because here you entrust yourself completely to the system — no belayer catches you if something goes wrong. The most common fatal error is banal and avoidable: the rope is too short and you rappel off the end. More than half of all lowering and rappel accidents come down to a rope end shooting through the device.
The good news — and it is good: almost all of these accidents are avoidable with two cheap habits. First: a knot in every rope end. Second: a prusik as a backup that locks automatically if you lose control. Together they turn the most dangerous moment into one of the most manageable.
Everything else is care and sequence: check the rappel anchor, thread the rope cleanly, weight and test the system before you release yourself. Work this chain the same way every time and you rappel safely for life.
## What You Need - A belay device for rappelling (tube) plus an HMS locking carabiner. - An accessory cord/prusik loop as a backup below the device. - Two rope ends, each with a knot (overhand) — always. - A trustworthy rappel anchor (bolted lower-off, rappel ring or solid self-built). - A personal tether to clip into the anchor while you prepare everything.
## Step by Step ### 1. Secure yourself at the anchor Before you prepare anything, clip into the rappel anchor with your tether. You never work unsecured at the edge — the principle is always attached.
### 2. Check the rappel anchor Inspect the fixed points: bolts, rappel ring or slings for condition, rust and seating. Old, bleached slings are a warning sign. The rappel anchor holds your full weight with no second chance — here you check, you don't hope.
### 3. Thread the rope and knot the ends Thread the rope through the lower-off, pull the middle to anchor height and throw both strands down. Before you clip in: a knot in each rope end. This is the one habit that would have prevented most rappelling deaths.
### 4. Rig the device and prusik backup Clip in the rappel device and add a prusik below (or above, depending on method) as a self-locking backup. If you involuntarily let go during rockfall or dizziness, the prusik holds you. Only then release your tether.
### 5. Weight, test, descend in control Weight the system while still at the anchor, check that device and prusik grip, then rappel slowly and evenly — braking hand always on the rope, eyes down on obstacles and the (knotted) end. At the next anchor you clip in again immediately.
## Common Mistakes - No knot in the rope end: rappelled off the end. Fix: knot both ends without exception. - No backup: no hold if you let go. Fix: add a prusik as a self-locking backup. - Rappel anchor unchecked: a rotten sling overlooked. Fix: inspect each fixed point individually. - Too fast and uncontrolled: losing control over the overhang. Fix: slow, even, braking hand firm.
## Safety Notes Take this number seriously: about 15 % of fatal multi-pitch accidents are rappel errors — and the most common cause, the too-short rope, is ruled out with a knot in ten seconds. There is hardly a cheaper life insurance in all of alpine climbing.
Two rules are non-negotiable. First: always attached — at every anchor you clip in immediately before doing anything else. Second: knots in both ends and a prusik backup, every time, even when it's "just a quick one". The tiredness at the end of the tour is exactly the trap most people fall into. Your routine must be stronger than your exhaustion.
And one often-overlooked point: before rappelling, check that your rope actually reaches the next anchor. If the rappel is longer than your rope half, you'd otherwise rappel off into a free drop — here the knotted ends save you from sliding uncontrolled off the rope. When in doubt, aim for an intermediate station rather than rappelling on a hunch.
## Pro Tip Introduce a fixed rappel check that you say out loud — like a cockpit checklist: "anchor checked, ends knotted, device in, prusik grips, tether out only now." Five points, always in this order.
Saying it aloud is no quirk: it forces your tired brain to consciously tick off each point instead of missing errors on autopilot. Pilots do this for exactly this reason — and when rappelling, you are your own pilot. Mountain, rock, self-reliance.
## FAQ ### Why is rappelling so dangerous? Because you entrust yourself completely to the system and nobody catches you if something goes wrong. Rappel errors are behind about 15 % of fatal multi-pitch accidents. But the main causes — too-short rope and loss of control — are almost entirely avoidable with knots in the ends and a prusik backup.
### Do I always have to knot the rope end? Yes, without exception. More than half of lowering and rappel accidents happen because a rope end slips through the device. An overhand in each end costs ten seconds and rules out exactly this most common cause of death. Make it a fixed habit — especially when you're tired and want it to "go fast".
### Do I need a prusik backup when rappelling? Strongly recommended. A prusik locks by itself if you involuntarily release the braking hand — during rockfall, dizziness or if something hits you. It turns a loss of control from a fatal into a solvable problem. Practise rigging and releasing it on the ground until it's dialled.
### How do I check a rappel anchor? Inspect each fixed point individually: bolts for rust and firm seating, the rappel ring for wear, left-behind slings for bleaching and brittleness. Old, weathered slings are a clear warning sign — when in doubt, add your own fresh sling. The rappel anchor holds your full weight, so: check, don't hope.
Alpine Climbing: Rope Commands and Communication in the Team