How to safely shorten your tether

[AlpineSavvy]

Need to shorten your connection to the anchor when using a tether? It's common to unclip and reclip your locking carabiner, but this can increase the chances of clipping it incorrectly. Here's a simple and more secure method.

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How to safely shorten your tether — Alpinesavvy

Need to shorten your connection to the anchor when using a tether? It's common to unclip and reclip your locking carabiner, but this can increase the chances of clipping it incorrectly. Here's a simple and more secure method.

Alpinesavvy (www.alpinesavvy.com)

[devnull]

Here's where I got a bit confused. AlpineSavvy recommends in that blog post to use another carabiner to shorten your 120cm sling to avoid the failure mode introduced by unclipping the first carabiner altogether and re-clipping incorrectly.

My standard practice is to just use the first (and only) carabiner to hook the shelf to shorten it. Is there a hidden failure mode I'm missing here?