This is a good shortcut to keeping up with residual nitrogen, but it may be missing an important factor, which is maximum allowable bottom time for your next dive (the planning part of these tables). That is given to you on Table 3, which isn't mentioned in this presentation.
My dive instructor taught me this way. It's been a long time since, I'd forgotten it. Getting back into diving so this is very helpful. Thanks from Australia
This is so helpful as a new dive instructor! I’m not the best at breaking things down but if I follow the way you did this I think my students will understand. Thanks so much!
This video is helpful but also problematic. It helpfully simplifies the tables by pointing out that, in Table 3 (which is not referenced), the Residual Nitrogen Time (RNT) after surface interval equals the maximum time allowed for a particular pressure group on Table 1. But this instructor computes the Total Bottom Time for a repetitive dive by adding the RNT to an already performed Actual Bottom Time (ABT). That's fine if the ABT has not exceeded the allowable no-decompression time, but the instructor does not show how to use Table 3 in advance for planning a repetitive dive. He only calculates ABT after a repetitive dive. If you haven't consulted Table 3, you don't know the time limit for ABT. So the math works out, but he has not shown how to plan a safe no-decompression repetitive dive.
I have been a commercial diver for the last 33 years and come across numerous incidents on DCS.The USN Tables are the basis of PADI but over the years USN tables have been made safer with Revision 6 in practice now.Its a know factor that chances of decompression increases with repetitive dives.The number of Decompression incidents are increasing as sports divers try to get deeper using dive computers and rebreathers and Trimix the very essence of diving for pleasure goes away when u have a fatality.As a person who spent thousands of hours underwater i approach SCUBA with uttermost caution.I am sure people reading stuff like this on decompression will assume you can keep repetitive dives.A good approach is to plan your dive have a clear picture of your bottom time ,deco obligation and also a back up when all else fails.A good video all you sports divers is this no hollwood stuff real men real danger. ruclips.net/video/9dG5KSD-8J4/видео.html
Thanks for making us newbies (I am only just planning to take the course) aware of the restricted applicability of this video. Knowing that chart 3 exists and that this analysis applies when no-decompression time limits have not been exceeded is good to be aware of.
Very well explained overall, thank you so much you just made me nail my exam after watching your video a few times and actually putting the work with a few exercises. Subscribed!
Nice simple explanation. Got certified as a kid back in the 70's and have recently gotten back into it. Was trying to understand the old dive tables and this brought it right back to me. With everyone using computers seems like no one cares about dive tables anymore which is a shame.
Super helpful. I took a PADI class years ago and ended up failing this portion of the test but u explained it much better than my instructor did at the time. I think I’ll have a better chance at passing next time I go thank u!
Very helpful! I was reading the book I got for my course and was still confused. This video helped me understand the tables to where I'm confident in moving forward.
the clarity and the simplicity of the way you taught this was phenomenal- in diving school and oh man I was getting taught butt backwards , thank you!!
Good refresher . The first piece of dive equipment I purchased after getting certified was a dive computer. I now have a primary and a alternate computers. You get so much more bottom time
This is a GREAT video to show how to use a dive table. Watch his part 102, 103 and 104 to get more details on how to calculate dive times and no decompression limits. Exactly what everybody wants, it’s just in different videos. Love this!!!
I just bumped into this video by chance. I'm not even interested in diving. BUT this video is very informative. Almost like watching the science channel.
I was certified more than 30 years ago and just started using a dive computer. Only after watching this video have I realised that Table 3 on the other side is redundant!
Correct, but the amount of residual nitrogen is represented by the pressure group letter, and you use the time noted by that pressure group at that depth to tell you how long to calculate for. It's letting the diver focus on the time rather than the ppm of dissolved nitrogen in the body.
Very clear explanations. May seam repetitive at the beginning but this makes you understand the sequence by "burning" the sequence into your brain. I'm PADI and glad to be. Have a good dive!
This is second video I watch and it seems you can carry on diving for ever. It does not explain why you use it, just how. Strange because I found Padi manuals to best ever books I had read in terms of explanation.
. Put your finger on E and slide it across to the depth you plan to dive next. E at 60 feet =17, E at 90 feet =11, E at 35 feet =32 minutes of residual nitrogen. The only time you need to turn it over is when you're looking up your pressure group to determine your minimum surface interval.
Hello sir; Really interesting class, I am about to take the Scuba dive this weekend, at first seeing little confusing but now I got to understand the procedures of the Scuba Table. Anyways, the whole thing here is to make sure that if I'm going to scuba dive, I have to maintain with the dive group to make sure how much residue of nitrogen still in our body. What we want here is to no to have nitrogen residue in our body right? thanks sir. Respectfully; Andy War Veteran Disable Tezas
table 3 shows you residual nitrogen time and adjusted no decompression limit..(RNT and ANDL) for repetitive dives. Actual bottom time (ABT) is what your "actual" dive time is and it is not to exceed your ANDL.
Your pressure group and residual nitrogen may both be found on the front. For example If you made a dive to 35 feet for 85 minutes you would be in Pressure group P, after an hour surface interval you would be in Pressure group E. You may look up your residual nitrogen for any depth on the front of the dive table. The only time you need to turn it over is when you're looking up your pressure group to determine your minimum surface interval.
This is a very neat method, but would be improved with an explanation of how, using this method, to check your no decompression limits for the subsequent dive. It's not hard, you simply subtract your residual time for that depth from the standard No decompression limit for that depth. The method he uses runs the risk of someone doing the maths of adding their residual time to heir actual bottom of time at the end of a dive and accidentally discovering you just blew your no decompression limit.
This is a good shortcut to keeping up with residual nitrogen, but it may be missing an important factor, which is maximum allowable bottom time for your next dive (the planning part of these tables). That is given to you on Table 3, which isn't mentioned in this presentation.
My dive instructor taught me this way. It's been a long time since, I'd forgotten it. Getting back into diving so this is very helpful.
Thanks from Australia
This was super helpful and helped me not fail my test. And it gave me a clearer understanding of how to use the table.
I'm in a diving school in Seattle and this really helped me better understand this chart. Thank you for clearing that up for me!
Congratulations! One of the best videos I'd seen to explain how to calculate multiple dives using the PADI Dive Tables.
The instructor that I have sucks at teaching tables. Thank you for your clear explanation!! Very easy to follow!!
I wanted to take a moment to thank you for teaching me the dive tables. Something so hard to read and understand you made it very easy. Thanks again
This is so helpful as a new dive instructor! I’m not the best at breaking things down but if I follow the way you did this I think my students will understand. Thanks so much!
I've been diving for 2 years and just using computer and hubby's help because of my dyslexia. Your the 1st that made sense. Thank you!!
This video is helpful but also problematic. It helpfully simplifies the tables by pointing out that, in Table 3 (which is not referenced), the Residual Nitrogen Time (RNT) after surface interval equals the maximum time allowed for a particular pressure group on Table 1. But this instructor computes the Total Bottom Time for a repetitive dive by adding the RNT to an already performed Actual Bottom Time (ABT). That's fine if the ABT has not exceeded the allowable no-decompression time, but the instructor does not show how to use Table 3 in advance for planning a repetitive dive. He only calculates ABT after a repetitive dive. If you haven't consulted Table 3, you don't know the time limit for ABT. So the math works out, but he has not shown how to plan a safe no-decompression repetitive dive.
Best comment so far, you 100 % right ,he mislead the viewers safety especially for beginners by ignoring table 3.
Totally agree, it was misleading to say the least.
I have been a commercial diver for the last 33 years and come across numerous incidents on DCS.The USN Tables are the basis of PADI but over the years USN tables have been made safer with Revision 6 in practice now.Its a know factor that chances of decompression increases with repetitive dives.The number of Decompression incidents are increasing as sports divers try to get deeper using dive computers and rebreathers and Trimix the very essence of diving for pleasure goes away when u have a fatality.As a person who spent thousands of hours underwater i approach SCUBA with uttermost caution.I am sure people reading stuff like this on decompression will assume you can keep repetitive dives.A good approach is to plan your dive have a clear picture of your bottom time ,deco obligation and also a back up when all else fails.A good video all you sports divers is this no hollwood stuff real men real danger. ruclips.net/video/9dG5KSD-8J4/видео.html
@@neelufisherman Video unavailable.
Thanks for making us newbies (I am only just planning to take the course) aware of the restricted applicability of this video. Knowing that chart 3 exists and that this analysis applies when no-decompression time limits have not been exceeded is good to be aware of.
Loved the repetition- it really helped to solidify the pattern in my head. Great video, thanks for posting
Thank you for a great presentation! Was extremely clear and now I finally understand the charts. Great job!
Very well explained overall, thank you so much you just made me nail my exam after watching your video a few times and actually putting the work with a few exercises. Subscribed!
Very clear - I start class in 3 weeks! Great primer. Clear and good examples. Many thanks!
U literally SAVED my exam question - I THANK YOU for your CLARITY
Nice simple explanation. Got certified as a kid back in the 70's and have recently gotten back into it. Was trying to understand the old dive tables and this brought it right back to me. With everyone using computers seems like no one cares about dive tables anymore which is a shame.
Super helpful. I took a PADI class years ago and ended up failing this portion of the test but u explained it much better than my instructor did at the time. I think I’ll have a better chance at passing next time I go thank u!
Very helpful! I was reading the book I got for my course and was still confused. This video helped me understand the tables to where I'm confident in moving forward.
the clarity and the simplicity of the way you taught this was phenomenal- in diving school and oh man I was getting taught butt backwards , thank you!!
happy to help
Good refresher . The first piece of dive equipment I purchased after getting certified was a dive computer. I now have a primary and a alternate computers. You get so much more bottom time
This is a GREAT video to show how to use a dive table. Watch his part 102, 103 and 104 to get more details on how to calculate dive times and no decompression limits. Exactly what everybody wants, it’s just in different videos. Love this!!!
THIS IS INCORRECT - THE RESIDUAL NITROGEN IS CALCULATED USING TABLE 3 - NOT BY RE_USING TABLE 1!!!
so awsome, i'm german ,14 years old and understood everything now.
Thank you soooo much. :D
Dive Cozumel
I just bumped into this video by chance. I'm not even interested in diving. BUT this video is very informative. Almost like watching the science channel.
Thought I was going to mess up that on the exam. Thanks for the explanation! This will help me a lot!!
A very good explanation, especially on RNT. Not flipping the chart over made it very clear
dang. that is a buttload of dives
YO!!! Finally, I see the light! Thank you so much!
Thank u for this video it actually helped me to finally understand diving tables!
now i understand..i pass my OW last month but still don't quite understand the RDP..thanks for the video...
Tables Aren't taught anymore so I am really happy to find this video you did a great job explaining it and without a 2 hour video.
Nuai still teaches tables
Very good video, clear and easy to understand. Thanks for refreshing me on the RDP
Thank you so much! Iv'e been having problems with dive tables and I finally get them.
Really well explained. All I recall using was the old US Navy dive tables.
I get it mostly, it's definitely helping me so I can do my assesment Thankyou!
Quick, clear, straightforward presentation. If you don't understand this presentation, you're out of luck ;)
Thé professor PADI have got a great disposition to teach...and hé is always asking:can i help you !!!
yep agreed its easy quick and clear! Residual Nitrogen is what we are after.
Excellently put across thanks for that.- Been diving years but still have to revise this every year I go ..lol ..
This guy is great! Dive Tables simplified.
Thank you thank you thank you! A quick and great logical rehearsal...
I am adding this video to my favorties
Thanks a lot clear and effective explanation
I was certified more than 30 years ago and just started using a dive computer. Only after watching this video have I realised that Table 3 on the other side is redundant!
I'm 12 years old and this was the only video that helped me understand. Thank you
Clear and concise... great video.. PADI table made simple.
Dude thank you, this made it so
Much easier to understand
Finally I've got it! Thank You Sir! :)
very helpful! my saviour
Very simple and easy to understand way to run the tables.
Brilliantly explained. Thank you, thank you, thank you....
This is so much easier than I have ever been shown.
Thanks so much for this video, it was a great help!
this was EXTREMELY helpful
The numbers across from the Vertical Pressure Group are the minutes not the "amount of residual nitrogen"
Correct, but the amount of residual nitrogen is represented by the pressure group letter, and you use the time noted by that pressure group at that depth to tell you how long to calculate for. It's letting the diver focus on the time rather than the ppm of dissolved nitrogen in the body.
Correct he needs to use the Info on the other side if the slate
Yeah that was confusing...
congratulatios presentation was very good and easy to understand!
Excellent, super presentation based on the chart.
This was a lot better then the PADI e course thanks
The Best instruction ever!
thank you for posting this video!
Wow. This video is proof positive that anything, no matter how simple, can be made confusing.
Thanks, very helpful! From Canada
Very clear explanations. May seam repetitive at the beginning but this makes you understand the sequence by "burning" the sequence into your brain. I'm PADI and glad to be.
Have a good dive!
morkbov ** I agree. As a teacher I can tell you that his repetition is very helpful.
thank you, this helped me a lot.
Now i can Do the Test! Thank You!!!
Well explained. Easy to follow. Thank you.
Great instruction, Thank you!
AMAZING! thaks for explaining!
Thank you very much for the clear explanation
Thanks!! That is a great explanation.
VERY helpful video!!
I teach SSI SDI/TDI/ERDI and IANTD..but I thoroughly enjoyed your presentation! Good work!!
This is second video I watch and it seems you can carry on diving for ever. It does not explain why you use it, just how. Strange because I found Padi manuals to best ever books I had read in terms of explanation.
Thank you this has helped me so much
Perfect.
thanks sooo much! ! ! this saves me from failing my dive quiz
Finalmente entendi!!! Obrigado
Excellent video.
Very informative. Thanks.
I got it right away after watching this
Thank you for this video.
. Put your finger on E and slide it across to the depth you plan to dive next. E at 60 feet =17, E at 90 feet =11, E at 35 feet =32 minutes of residual nitrogen. The only time you need to turn it over is when you're looking up your pressure group to determine your minimum surface interval.
The next table I want to get familiar with is bottom time. I'm relearning since my certification 22 years ago and did nothing after cert.
Thx it’s help me very muchhh
Hello sir;
Really interesting class, I am about to take the Scuba dive this weekend, at first seeing little confusing but now I got to understand the procedures of the Scuba Table. Anyways, the whole thing here is to make sure that if I'm going to scuba dive, I have to maintain with the dive group to make sure how much residue of nitrogen still in our body. What we want here is to no to have nitrogen residue in our body right? thanks sir.
Respectfully; Andy
War Veteran Disable
Tezas
i got the bends just watching this guy. helpfull though
Thank you so much :)
Excellent. Made very clear.
table 3 shows you residual nitrogen time and adjusted no decompression limit..(RNT and ANDL) for repetitive dives. Actual bottom time (ABT) is what your "actual" dive time is and it is not to exceed your ANDL.
Thank you for this post I am a vacation diver unfortunately and this is just great as a refresher
Thanks so much!
This all makes sense to me.
Been trying to learn them again been awhile
Thank you, for the life of me i could not figure this out
Excellent
Your pressure group and residual nitrogen may both be found on the front. For example If you made a dive to 35 feet for 85 minutes you would be in Pressure group P, after an hour surface interval you would be in Pressure group E. You may look up your residual nitrogen for any depth on the front of the dive table. The only time you need to turn it over is when you're looking up your pressure group to determine your minimum surface interval.
Best job on covering this that I've seen. Well done! And thank you! Curious how you'd fit table 3 into this.
Chris B watch the other 2 videos; 102 and 103
does it work in the metric table as well?
Nailed it!
Just a question, what do those arrows pointing downward in certain columns mean?
This is a very neat method, but would be improved with an explanation of how, using this method, to check your no decompression limits for the subsequent dive. It's not hard, you simply subtract your residual time for that depth from the standard No decompression limit for that depth. The method he uses runs the risk of someone doing the maths of adding their residual time to heir actual bottom of time at the end of a dive and accidentally discovering you just blew your no decompression limit.
Hey! Nice video!
What if I do a third dive?
Is the same process as the second?
Thanks