As I have seen it used, "Dd" means Doubled.
It seems to me that it doesn't make any difference which way one is moving in the tree--up, down, laterally--one still is advancing the rope; they are advancing the rope in the direction they want to go.
I appreciate all the attention being paid to detail here; I just hope we don't get bogged down with too much nit-picking and side issues. (I have a lot of experience in doing those things, so am quite aware of the dangers!)
I remember back when I was first learning by reading the books, mainly Jepson, On Rope, Flowers' and studying the thread sites, I constantly had to go back and re-read all the terms being used, just to understand what was being said. If these books were for beginners also, then why should it have been so difficult?
Why are we trying to capsulize these specific functions of climbing into one or two or three not very descriptive words? Peter's statement above, although unknowingly, is a great example: "...resetting your rope placement during a down pitch" is already a GREAT description, so why capsulize it into a new two or three word, unclear or difficult, phrase?(re-setting TIP?, going down TIP?, etc.) This only causes the reader/climber(especially the beginner) to be unclear or even confused and to have to constantly go to the Glossary to clarify what could have been just as easily described in only 3-4 words already, such as what Peter described above in the first place: "resetting rope placement on descent". --See that wasn't so long, was it? ---And yet was very clear, right?
I think we need to move away from coining new phrases just to seem more professional or save typing space or not having to repeat a few words or whatever other unimportant reason,
and concentrate on allowing the reader, whether beginner or advanced, to be crystal clear as to meaning, which is much more important. After all, his very life may depend upon it!!
There's an old expression that says, "Say what you mean and mean what you say", that we should all remember.
BTW, 'DRT' means, according to the norms on Treebuzz, Double Rope Technique, which means using two separate ropes where one is a backup, whereas, DdRT means Doubled Rope Technique which means one rope doubled over an anchor point.
I still don't like these Acronyms. This is a great case in point above. Especially since all of us are still unclear, even those who are very experienced, as to the meaning of DRT and DdRT, which is one of the basic foundational principles of tree climbing, and as such, should already be very well understood by all of us, right? And if not clear to so many, why not?---Because of the unclear Acronym!!
Please let's describe, rather than coin phrases!
Jay, I've never seen "DbRT" before--where have you run across it? Also, since it means the same thing as "DRT," why would someone create or use the term?
Maybe I've seen DdRT defined as you say, but my recollection (quite possibly fallible) is that the lower-case "d" was the terminal letter of "doubled." Why would someone choose to create an acronym and have the word "dynamic" be abbreviated with a lower-case letter when the other words use upper case? Doesn't make sense.
I was hesitant to even bring all this up--it's certainly nit picking and probably of no importance. (And I definitely don't want to be nit picking with my mentor!)
But I am curious about this.
I wonder where the ultimate authority on this is? Maybe this will be one of those unanswerable mysteries!
I think the founders/fathers of our culture are the authorities, especially since there is so little written about our culture/industry.
Perhaps Tom Dunlap or Peter, et al can shed some light on these acronyms.
I don't believe they are ANSI approved terms and therefore are simply accepted because of common use over the years. Unfortunately, I think, that just as quickly as they are formed and used, so too they are forgotten or confused. So we must ask the fathers to chime in.
I hadn't ever seen DbRT until Peter typed it, and I first assumed it was a typo.
I just noticed that Sherrill's new rec climber catalogue uses the term DdRT on page 15 to described climbing with a Blake's. (Not that we should be led by an equipment company, but I just thought it was interesting.)
I hope everyone understands why this subject is so important here. I coined the letters DRT long ago to coincide with SRT. It was to diferentiate the two techniques from each other. It stood for "double rope technique."
We now have the phrase "doubled rope technique" as the description. It may seem as a small thing but to me it is a big deal, because the book I am writing will pretty much set the language for future new climbers. This is why I am coming to the tree climbing community for clarification.
It appears that "DdRT" is what language people want spoken.
Please make your thoughts known if you have not done so yet. I come to this topic many times a day as I write to keep updated. I have a long list of words still to post but this DdRT thing is the foundation of our style of climbing.
Thank you all for participating here. It really is helpful getting other viewpoints rather than just using my view alone without feedback.
When I was first learning, I thought logically the first time I saw the letters DRT that it meant "Double Rope Technique" with the emphasis on the idea that it described a 'technique' and not what the rope was doing. Then, when I saw for the first time on another thread the letters "DdRT", I also logicked(?) that this meant Doubled Rope Tech. which I logically thought this meant that the rope was doubled, as in two parallel lines running through a device like a rescue 8 descent device or two completely separate lines. I was totally shocked and confused to learn that the accepted norms from the prof. arborists was the total opposite.
Therefore, my two cents is in support of Peter's original coining, that we should only have one acronym, "DRT", to describe the technique of doubling a rope over an anchor and creating a 2 to 1 advantage in order for the climber to use all traditional hitch type setups.
Also, therefore, I believe we should completely drop the "DdRT" acronym and in its place, simply describe all other setups, like using two separate lines or parallel lines simply doubled for footlocking, etc.
I don't see introducing new acronyms as favorable at this date in the history of RTC, but one came to mind: LRT as Looped Rope Technique. This captures a visual description of what takes place with the DdRT. It can be defined as a dynamic loop. It's differentiated from the two static rope scenarios described as DRT: 1)foot locking on a doubled rope 2) two ropes used as lifelines.
I see two guiding principles on nomenclature for RTC:
1) use nomenclature that promotes respect of a living organism
2) use nomenclature that connects with the general public entering RTC.
Speaking of new terminology, I often describe DdRT as â€œpulling yourself up by your bootstraps.â€ Maybe we could call it the â€œbootstrap technique.â€
New Tribeâ€™s web site uses â€œDRTâ€ for Doubled Rope Technique.
I donâ€™t think **** Flowers uses any abbreviations.
Jeff Jepson uses the acronym â€œSRT,â€ but doesnâ€™t use an acronym for the dynamic system--simply calls it the â€œdynamicâ€ system. Maybe we could call it the â€œdynamic systemâ€ and not use an abbreviation.
Someone might want to examine the professionalâ€™s sites in detail to see what they do. Charlie did report that DdRT seems to be the norm on Tree Buzz. How about ArboristSite and others?
Bfore you read any further you might want to get some hearing protection...I'm going to toot my own horn...I'll try to make it a short toot
There, now, onto some old history.
Quite a while ago, I believe on the original ISA discussion forum from about ten years ago this whole DRT chatter got going. After some thrashing of terms it was agreed that DRT would mean either a dynamic or traditional climbing hitch system or one where a rope is 'D'-ouble-'d' over the tie in point...I'll get to that later...
Go and google "double rope technique" I think that you'll find that it is a rock climbing style used mostly in the UK where two seperate ropes are used to support the climber. Each of the ropes is called a 'half-rope' because they are each a bit smaller. The reason for the two ropes is more safety and security.
If follows that single rope technique uses only one rope to secure the climber.
Designating the term DdRT has been one of my causes. It cleans up the description of the climbing system. Tobe changed the catalog description after I wrote to him a while ago.
Is there an arguement for 'not' using DdRT to designate the traditional tree climbing arrangement? With close to a decade of history it seems to make sense to continue to use this form.
Google gives this for 'DdRT rope'
I submitted the definition for DdRT. The SRT article that I wrote for TCI magazine is linked too.
Google gives this for 'double rope technique'
Google gives this for 'double rope technique'