DIR- GUE Why are non-GUE divers so interested in what GUE does?

[crofrog]

The Tech 1 manual literally says something like ratio deco holds an elevated chance of user error, and is good for quick approximations or to make on the fly adjustments and that you shouldn't substitute it for proper planning using decompression software...

Wibble if you don't want to take tech 1 you can join GUE at the gold membership level and get access to all of the training materials for all programs, and gue.tv...

 

[Manatee Diver]

Ratio Deco is one of the areas that I disagree with the GUE over, though I do use their rule of 130 to estimate dives to see if I need to plan it as a staged deco dive or not.

And my issue with it is that if both my computers fail, I have no way to knowing what my current depth or time is; and thus have switched to emergency plans like using my buddy's computer. Which I can follow that profile, if all the computers have failed you are in deep sh*t, and you go with whatever cut plans you have and hope that you can count time accurately in your head.

Now just because I don't agree with in-water deco calculations doesn't means that I don't advocate planning your dive, I think those are two separate topics. But these disagreements wouldn't prevent me from taking the training, as I get the feeling that ratio deco is more of an emergency procedure when you are doing non-class dives. So during class, it is a "when in Rome" situation.

 

[crofrog]

Ratio Deco is one of the areas that I disagree with the GUE over, though I do use their rule of 130 to estimate dives to see if I need to plan it as a staged deco dive or not.

And my issue with it is that if both my computers fail, I have no way to knowing what my current depth or time is; and thus have switched to emergency plans like using my buddy's computer. Which I can follow that profile, if all the computers have failed you are in deep sh*t, and you go with whatever cut plans you have and hope that you can count time accurately in your head.

Now just because I don't agree with in-water deco calculations doesn't means that I don't advocate planning your dive, I think those are two separate topics. But these disagreements wouldn't prevent me from taking the training, as I get the feeling that ratio deco is more of an emergency procedure when you are doing non-class dives. So during class, it is a "when in Rome" situation.

I'm not sure what part you disagree with the tech1-v4.0 basically says not to use it as a primary means and includes procedures for using computers and deco planner as well

As far as knowing current depth, your SMB tells you that, and some might call me old school but there's a reason I always wear a dive watch.

 

[jlcnuke]

I'm not sure what part you disagree with the tech1-v4.0 basically says not to use it as a primary means and includes procedures for using computers and deco planner as well

As far as knowing current depth, your SMB tells you that, and some might call me old school but there's a reason I always wear a dive watch.

So, this is my curiosity only, but if I'm going to plan the dive using dive planning software (as trained by every agency these days I believe), have my dive plan (and contingencies) written down. (as trained).. just in case, and have a primary computer that is fully capable for the dive, along with a backup computer that's fully capable for the dive, what does also doing RD accomplish for me? Is it just a carryover from when reliable dive computers weren't something people routinely did tech dives with?

 

[RedSix]

Actually there is a good article about the ratio deco on in depth:

Rules of Thumb 2: Further Mysteries of Ratio Deco Revealed

Are you able to calculate your decompression for a 40-50m/130-165 ft dive using only your average depth and bottom time? Here British techmeister Rich Walker further divulges the enigmatic mysteries behind GUE’s ratio decompression protocols in this part two of the series.

gue.com

Edit: Sorry, has been posted before...

 

[Wibble]

If you're diving beyond NDLs then you must have a computer. As it's a "must", then you need two computers, just like backup lights, cutting devices, SMBs, masks.

Those computers must be configured with your gasses, just as you would label your tins after analysis.

If you don't know the rough dive times, you can use MultiDeco/whatever to check the profiles with min gas and max bottom time.

Then go diving. ComputerS show you your profile, TTS and you can even watch the SurfGF fall as your decompression progresses. No harming of brain cells and in particular keeping an eye on and remembering the average depth, deco stop countdown, etc.

As I said, I jump in and I become an imbecile. I cannot hold information like that safely, nor do I want the utter pain of running a manual deco curve. I look at my wrist and it says Stop: 30m for 3mins. Then it changes to 27m for 3 mins, etc. If a mermaid swims past I'd immediately forget everything; only training keeps me stable and another look at the computerS tells me all I need to know about the deco in hand. And the TTS to think about the nice warm cup of tea waiting for me on the boat.

 

[PfcAJ]

If you're diving beyond NDLs then you must have a computer. As it's a "must", then you need two computers, just like backup lights, cutting devices, SMBs, masks.

Those computers must be configured with your gasses, just as you would label your tins after analysis.

If you don't know the rough dive times, you can use MultiDeco/whatever to check the profiles with min gas and max bottom time.

Then go diving. ComputerS show you your profile, TTS and you can even watch the SurfGF fall as your decompression progresses. No harming of brain cells and in particular keeping an eye on and remembering the average depth, deco stop countdown, etc.

As I said, I jump in and I become an imbecile. I cannot hold information like that safely, nor do I want the utter pain of running a manual deco curve. I look at my wrist and it says Stop: 30m for 3mins. Then it changes to 27m for 3 mins, etc. If a mermaid swims past I'd immediately forget everything; only training keeps me stable and another look at the computerS tells me all I need to know about the deco in hand. And the TTS to think about the nice warm cup of tea waiting for me on the boat.

You don’t really need a computer.

You need a depth gauge, a watch, and your tables.

 

[Wibble]

You don’t really need a computer.

You need a depth gauge, a watch, and your tables.

You omitted bringing a brain and concentrating.

Thus one does need a computer.


Klang.... Oh, that's why you dive in teams. So you can compare your deco calculations and validate each other's progress.

 

[ginti]

So, this is my curiosity only, but if I'm going to plan the dive using dive planning software (as trained by every agency these days I believe), have my dive plan (and contingencies) written down. (as trained).. just in case, and have a primary computer that is fully capable for the dive, along with a backup computer that's fully capable for the dive, what does also doing RD accomplish for me? Is it just a carryover from when reliable dive computers weren't something people routinely did tech dives with?

As others said, ratio deco is good to know because it is super fast and the most convenient method to make QUICK checks. Nothing more.

For deco planning, other methods are more suitable.

 

[Big-swede]

You don’t really need a computer.

You need a depth gauge, a watch, and your tables.

I wont argue with bringing tables etc but to use brain+watch+depth gauge+tables instead of computers seems a bit like adding extra failure points.