View Full Version : Buhlmann Tables
hi sorry to trouble yous all.
im new to the forum so first off hi every one.
im doing my cross over and all i have left to do is my lecture exams about buhlmann tables, dose anyone maybe have any pass papers or example questions on this? so i can practice...
everone keeps telling me read the book scotsac provided but all i need is some questions so i can practise using the table and do the calcs etc....
any help well be good
thanks
Hi there Diver Cam,
Welcome to Conger Alley! :)
Any chance you can tell us a little bit more about yourself in Jimmy's, which doubles as our Intro area: http://www.congeralley.com/forum/forumdisplay.php?f=17
Personally I don't have any Buhlmann examples, but maybe someone else might be able to help you out there.
evening, welcome to CA :)
but why the feck are you using Buhlmann tables?
evening, welcome to CA :)
but why the feck are you using Buhlmann tables?
It's an important part of ScotSAC training: although the trainee will probably not use tables as part of subsequent dive planning, the discipline of using them in training instils an awareness of the timescales and depths involved in nitrogen loading. It's an awareness that stays with you for years afterwards.
:)
evening, welcome to CA :)
but why the feck are you using Buhlmann tables?
No doubt because they are what Scotsac use and therefore he needs to learn how to use them for his Sport Diver exam.
ITDA also use them.
Hi Diver Cam
Have you done the lecture that covers this? I would suggest you pluck some figures from thin air and run them through the tables to become comfortable with them.
i.e. Draw up the dive profile/deco for:-
Dive 1 A 30 minute dive to 30m; then
A 2 hour surface interval; then
Dive 2 A 40 minute dive to 25m.
Get someone else in your club to check it and check you're using the tables correctly - should all be covered in your lecture.
thanks for the comments guys and thanks gord for explaining what the tables are and why we use them/understand them!
Lizardland
23-05-08, 15:55
The hardest part of learning to use tables is figuring out repetitive dives and surface intervals so that's what you should look at most. I'm not sure if it's part of SSAC but when I've done Buhlmann tables on other courses we had to do stuff along the lines of if your first dive was ........ and you want to do ..... for your second dive then what surface interval do you need to be able to do it?
evening, welcome to CA :)
but why the feck are you using Buhlmann tables?
Tables... how retro :D
I do think they are an unneccessarily complicated (and a bit outdated) part of learning to dive but sadly there's no way round them because if you want to learn how to plan a dive then you need some idea of a realisitic time limit.
Personally, I've got Jdeco on my phone, best £30 I've spent and it does it all for me. I've got some paper tables somewhere but I wouldn't even know where to look for them. It's aqualungs, flippers and goggles territory.
Cheers,
Stuart
The hardest part of learning to use tables is figuring out repetitive dives and surface intervals so that's what you should look at most. I'm not sure if it's part of SSAC but when I've done Buhlmann tables on other courses we had to do stuff along the lines of if your first dive was ........ and you want to do ..... for your second dive then what surface interval do you need to be able to do it?
thats what made me kinda go huh? when i first saw a question. i guess i just gota keep plugin away at it
thats what made me kinda go huh? when i first saw a question. i guess i just gota keep plugin away at it
Just wait until you have to convert Nitrox to equivalent air depth using formula and then do the calculations.....and then use a different nitrox mix for the second dive....and then work out how much air you need for everything and what cylinders you should use......ITDA exam this week frazzled my brain!
*cameron sits with a blank look on his face*
sounds erm...... complicated? i think if i ever did that and passed it be beers all round
*cameron sits with a blank look on his face*
sounds erm...... complicated? i think if i ever did that and passed it be beers all round
ask your instructor for some worked examples. I remember having loads of those to practice on. (and before you ask - sorry - no idea where they are now ;))
It's an important part of ScotSAC training: although the trainee will probably not use tables as part of subsequent dive planning, the discipline of using them in training instils an awareness of the timescales and depths involved in nitrogen loading. It's an awareness that stays with you for years afterwards.
:)
I wasn't questioning why use tables, I was questioning the use of Buhlmann tables for typical recreational NDL diving.
I always thought they were for deeper deco diving, however I could be wrong as I dont use them myself. The RDP is more than enough for my needs.
all i have left to do is my lecture exams about buhlmann tables, dose anyone maybe have any pass papers or example questions on this? so i can practice...
There are some examples on page 240 of Deeper into Diving 2nd edition by John Lippmann and Dr. Simon Mitchell. (ISBN 0-9752290-1-x). In fact that whole section of the book is very informative.
If you would like, I can type them up and send them to you.
However, I am very surprised that there are no more examples available for you to use.
Lizardland
23-05-08, 19:04
I always thought they were for deeper deco diving, however I could be wrong as I dont use them myself. The RDP is more than enough for my needs.
Nope, Buhlmann are a complete set, both deco and NDL. IANTD's basic nitrox (a no deco course) is/was based around Buhlmann tables. IIRC they are the standard tables for CMAS and are used by most of the European clubs.
im sorry i didnt mean to open up a can of worms and start a debate or anything
Cam,
If you still need assistance with the tables PM me and i will get some examples sent to you. I have been diving for over 20 years and although i use a computer i still carry tables, depth guage and watch, just in case the computer fails, which it has on a couple of occasions. The tables are easy to use so you won't need to worry about that.
Which branch of ScotSAC have you joined?
im sorry i didnt mean to open up a can of worms and start a debate or anything
thats what this place is for...! the debate that is, not the worms..:)
Buhlmann tables are one of the most used tables in the world along with the US Navy tables and the PADI tables.
they are also one of the easiest tables to use IMHO, much easier than the PADI tables that you formally trained on.
if you can master basic tables, it will benefit you when you advance in to more technical aspects of diving.
dont think of them as a chore, think of them as building blocks in your learning curve.
good knowlege comes from tables, you can compare them to the computer you will no doubt use and see how conservative it is and also other tables.
then you can make up your own mind which software to buy...;)
p.s. should be a tables example in the back of your SSAC logbook or training book.
thats what this place is for...! the debate that is, not the worms..:
Buhlmann tables are one of the most used tables in the world along with the US Navy tables and the PADI tables.
they are also one of the easiest tables to use IMHO, much easier than the PADI tables that you formally trained on.
if you can master basic tables, it will benefit you when you advance in to more technical aspects of diving.
dont think of them as a chore, think of them as building blocks in your learning curve.
good knowlege comes from tables, you can compare them to the computer you will no doubt use and see how conservative it is and also other tables.
then you can make up your own mind which software to buy...;)
p.s. should be a tables example in the back of your SSAC logbook or training book.
How are you still posting? :D:eek::D:D
How are you still posting? :D:eek::D:D
Rhetorical bait? ;):D
im sorry i didnt mean to open up a can of worms and start a debate or anything
If you're not opening a can of worms, then don't post - it's fine really :D
im sorry i didnt mean to open up a can of worms and start a debate or anything
Don't be sorry, thats what a forum is for!
Nope, Buhlmann are a complete set, both deco and NDL.
Oh, i always thought they were generally used for deco diving
thats what this place is for...! the debate that is, not the worms..:)
I prefer to use squid as bait, hell stinks, but catches the fishes!
The buhlman tables are fine if you've time to hang around all day having a 120 min SI as they are based on 12 tissue compartments,the padi tables use 14 compartments and allow for quicker off gassing so shorter SI times :D
The buhlman tables are fine if you've time to hang around all day having a 120 min SI as they are based on 12 tissue compartments,the padi tables use 14 compartments and allow for quicker off gassing so shorter SI times :D
may i take this opportunity to lend you my US Navy tables?
you can be out the water after a 200 minute NDL dive without a safety stop.
i dive them almost every day and im not dead yet.;)
Yogi Diver
27-05-08, 08:12
I wasn't questioning why use tables, I was questioning the use of Buhlmann tables for typical recreational NDL diving.
I always thought they were for deeper deco diving, however I could be wrong as I dont use them myself. The RDP is more than enough for my needs.
I find the RDP is harder to use than Buhlmann Tables but basically doing the same job for Recreational Diving, albeit based on different ascent rates and stops. Anyway, most of us just rely on our computers and never refer to tables after we have qualified.:rolleyes:
*cameron sits with a blank look on his face*
sounds erm...... complicated? i think if i ever did that and passed it be beers all round
Filed away for future reference. :D:D:D
Hello
I found an old paper someone sent me...
BUHLMANN TABLES : EXAMPLES
1. (a) Dive A is to be at a depth of 27metres with a bottom time of 35 minutes.
Calculate the decompression requirements
……………………………………………………………………………
1. (b) Dive B is to be conducted to a depth of 20 metres following a surface interval of 52 minutes
from the end of dive A.
ONY THE MINIMUM DECOMPRESSION REQUIREMENT IS TO BE INCURRED
Calculate the available bottom time for this dive.
……………………………………………………………………………
2. A dive starts at 10:00 am and has a maximum depth of 35 metres with a bottom time of 22 minutes.
At what time will the diver surface after following correct procedures.
……………………………………………………………………………
3. Following no. 2 above, the divers re-enter the water at 12:30hrs for a dive to 21 metre,
with an intended bottom time of 25 minutes. Calculate the decompression requirements
……………………………………………………………………………
4. (a) Dive A is to be to a depth of 38 metres with 29 minutes of bottom time.
Calculate the decompression requirements.
……………………………………………………………………………
4. (b) Dive B is to be conducted to a depth of 17 metres following a surface interval of an hour and a half
from the end of dive A.
ONY THE MINIMUM DECOMPRESSION REQUIREMENT IS TO BE INCURRED
Calculate the available bottom time for this dive.
…………………………………………………………………………