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 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. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-9dG5KSD-8J4.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.
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!
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.
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.
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
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!
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!!
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!!!
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!
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.
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.
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
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!
Michał Piskorski , if he saved your idc, and you didn't know how to present instruction on the dive tables...the basics of underwater safety.....you don't deserve to be an OWSI any more than this idiot presenting
I presented my IDC to one of the people that WROTE the instructors manual, and I have my instructor's number on some pretty famous cert cards. I've had dive shop owners compliment on the way I teach. When it comes to the tables, I make learning them easy, and understandable. SIMPLY because I follow the rules, and don't think I'm better than the Organization we all are members of.
Jim Kay slow clap...these were the best and easiest way to learn I've ever seen...some instructors think they're amazing because they have fancy certificates but then there are the natural teachers!
Michał Piskorski it's obviously a bad or failing instructor that makes his penis hard by cyber flexing...let him flex ultimately his claims are empty and false
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.
. 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.
