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caution needs to be exercised during use on a horizontal traverse. Depending upon the
ascender design, it can be kept parallel to the rope during a traverse by attaching a
carabiner through the handle or the nose of the ascender and around the fixed rope,
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which will reduce the likelihood of the ascender becoming detached (Figure 148).

Figure 148- Providing for security during a horizontal traverse with ascenders. Petzl Ascension
Ascender shown rigged for traversing a fixed rope with; 1.) Carabiner clipped to fixed rope from ascender
handle. 2.) Carabiner clipped through ascender nose and around the fixed rope (Note: Both techniques
are recommended by the manufacturer).

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TWO POINTS OF CONTACT- Ascending Systems
An ascending system should have "two points of contact at or above the waist" with
the rope for redundancy building a safe design. These may include:

• Separate top belay
• Third ascender incorporated into the system
• Prusik backup
• Tying in short; periodically a bight is tied in the fixed rope immediately below the
rescuer and clipped into the climbing harness with a locking carabiner

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SAFE ASCENDING SYSTEM
The critical criteria that all vertical ascending systems should meet;
1. If any component fails the climber will not fall upside down or to the ground
2. If there is a failure, there should be a third ready-to-use ascender or quick
attachment system (QAS) that can be placed into service
3. A climbing system should have two points of contact on the rope at all times
4. A regular system of inspection and replacement of worn components

66 Petzl. Ascension Technical Notice. pg. 3.
67 Smith, Bruce. Personal interview. May 5, 2015.
68 National Speleological Society, Basic Vertical Training Student Manual. pg. 17.

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