We already know why it is confusing and ill-defined, so here's why the term "QAS" is also superfluous and obsolete:
During my BQ (Before QAS) years in caving, climbing, canyoning, etc., I never felt the need for anything like the term "QAS". Nor did any of my partners. No confusion or communication difficulties resulted from its lack. In my TAG years, folks used the simple word "safety" or the like to refer to the TECHNIQUE of securing one's personal safety when operating in or around a fall hazard. There are many ways to do this, most of which involve attaching a tether (fixed to the appropriate point on the harness) to one or more of the following: fixed anchor, one of many appropriate knots/hitches in the rope (e.g. clove hitch) or hitches around the rope itself (e.g. Prusik) an ascender, shunt, or other mechanical device. I'm sure others can add to the list.
The term "QAS" therefore refers to a technique and not to a piece of equipment. Every competent vertical caver should always have one, so in this sense George D's comment is true. However, the comment is BS in another sense due to the fallacy of using "QAS" to describe a piece of gear. Perhaps it would be more accurate to say that the practice of securing oneself (or having the ability to do so) to mitigate a fall hazard is one among many true "marks" of the competent vertical caver?
QAS is a useless "marketing" term that has been taken seriously in the U.S. caving/rescue community in part due to the cult of personality and/or authoritarianism that still prevails in TAG. The strength of the cult is evident in this thread: note that several posters have tried to keep the term “QAS” au courant by changing the meaning of the acronym. Cavers are often heard to say that they "always" do this or that because they were taught to, or because it's in a book somewhere. The true mark of a competent caver in my "book" is the ability to apply a critical eye to "authoritative" teachings and adopt or reject them based on reason and not authority. Those who feel inadequate to make such judgments are not taking full responsibility for their own safety and are subject to death by AWTHority. That's "Accident Waiting to Happen" - ority. My idea of a joke. Ha ha. Read the "bibles" and listen to your "elders" - yes, but avoid blind adoption of useless techniques, terms, etc. by thinking, experimenting, and using your own judgment. A few more thoughts and refs below. Read at your own risk; they may be useless - as FOX news says but does not mean: you decide. Cheers.
Silly caver practice #232: requiring everyone in the party to negotiate a difficult lip. Well, why is the lip difficult? Mostly due to poor rigging practice, says I. "IRT rules!" says another. OK, even with the questionable practice of using IRT* for general caving, it is silly to have everyone exposed to the additional danger of a treacherous lip*. Among canyoneers out here in slot-land, it is customary for one or more members of the party to "comfortize" the lip for all but the last person. Hey, there's even a handy acronym for the practice: it's called "LPAR" or "last person at risk." The practice of LPAR (used to be called LMAR) facilitates and speeds descents. Anyone feeling the need to do a hard lip (for practice, ego, or...?) can simply volunteer to be the LPD.
Comfortizing a lip usually consists of creating a temporary anchor or deviation (often a person or persons) to change the angle of the rope crossing the lip. It works really well - try it sometime.
*IRT can be expedient for exploration, just as silly lips can be good training.
From
http://www.caves.org/soapbox/viewtopic. ... 378937623b
6) QAS: Quick Attachment Safety. A handled ascender connected to your maillon that you can put on rope quickly. Most effective if you can do it with one hand, either hand and eyes closed. Often used at lips, traverses, change-overs, any time you want to be secured to the rope.
Note: not picking on Scott here; this was simply the first reference I Googled.
:devil: