Learn PADI RDP tables the easy way! (Repetitive Dive Planning)
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- Опубліковано 15 чер 2024
- Learn PADI RDP tables the easy way! (Repetitive Dive Planning). If you are new diver learning how to use the PADI RDP tables (Recreational Dive Planner), it can sometimes be frustrating. Lyell is here to help you pass your PADI final exam and teach you the EASY way to figure out how to plan repetitive dives!
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0:00 New diver....trying to pass PADI Final Exam?
0:45 Dive plan diagram for repetitive dives.
1:28 Surface Intervals
2:28 Changes in Pressure Groups and Residual Nitrogen Time
3:50 Repetitive Dive Example
5:16 Table 3
6:11 RAT Formula
7:37 Pay attention to Required Safety Stops!
8:01 Now the Easy way!
8:58 2nd Exampke the Easy Way!
10:00 Did this help you? If so give us a like! :)
10:17 Next.....ANDL and minimum SI
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This was truly far better explained that the PADI E-Learning video(s).
Thank you, we were so confused, and you helped us understand.
Wow
This is absolutely amazing
Newly subscribed
Working on my AOW in June
50+ dives since 2017 and these are really helping me better understand and showing me all my mistakes
lol
Great video, when I had my OWD, I teached the table by myself, with helf of a video in UA-cam, because I thought it's useful to know how it works, I knew two or three dives on one day, is more then save, but I thought, I should know the table because, what if my divecomputer wouldn't work, but I really want to do another dive. So I could use this, I would be enough to go diving or to cancel.
I guess divers should learn the table, as a kind of backup divecomputer. 😯
I only use my dive computer as a digital depth gauge and time. I reference it to see my max depth and time when doing g the logbook. Most times I will use the RDP to determine the RNT and minimum SI. “If you don’t use it, you will lose it!” Great video man. Dive on.
Thanks. You made the complex things simple to understand-which is really the prime example of an excellent instructor (as in any field of discipline). Appreciate everything that you do for the world of scuba diving and the science behind it. 😊
This is one of the best videos explaining this chart. We used the old charts back in the 80's and 90's before the dive computers came along. Never had any problems with figuring out our safe dive times. We were more conservative than these charts.
Awesome video. Thanks for posting!!
Thank you for another great video. Every dive promoter should make a video just like these exactly before they're allowed to call themselves promoters of diving.
You rock, keep up the great work, take it easy and Happy Diving.
Don, thank you for such very kind words!
Just starting my PADI this video has been a good send I can't believe these tables are optional, it seems so crucial
My daughter got her ow cert three years ago through PADI. They never went over dive tables. I had to relearn them to teach her dive planning. Further proof it's not the agency but the instructor.
You're right, they don't teach tables anymore. The e-learning course has an optional section on dive tables, but it's not testable. Most shops stick to the curriculum; get ya in and get ya out!
I've been diving now 22 years. I purchased my computer from dive shop the day i was certified. So the only time i used tables was in class 😂. Doing a reactivate class this week. Man my 29 Year old brain was definitely sharper than my 50 😂 dang
Liked and shared! Thank you! This was very useful for review!
I wish my instructor could have explained it like this.... well done
Very good, appreciated it.
Wish to learn a lot, as I am working towards my Dive Master cert.
Cheers.
Thank you !! It did help me a lot for my Dive Master text
Another Awesome video bro 😃🤙
Thank you, the chart flows much better after your explanation! I did not realize I could use the front to calculate my residual nitrogen time.
Thank you so much for your video-I got certified in 1988 and am doing a refresher course. It is amazing what you remember, but not this part...Thanks to you, I think I finally got it!!
Dana, glad we could help! Thanks so much for watching and letting us know it helped you out!
Thank you!
Thank you. Much better than the instruction that came with it!
Great instructional video. The only suggestion is that you should mention in your example that the TBT on the 2nd dive violets the NDL/ANDL and highlight the danger and why your subsequent video on ANDL is critical. Good job on pointing out the the safety stop requirement on the table. Well done!
Cheers Lyell good clip. It would be sweet in metric for us European folks.
This was a great video. I use my dive computer like most others and don't think about these tables anymore but what if your computers battery dies? My ole dive table card is part of my save a (second) dive kit. And I had forgotten or never understood what the gray area indicated! I assumed it pushed me past 1.4, so I'd go to the closest non color box. Thanks for teaching a old dog!
Made it super easy but I'd love to get in some practices though 😊
excellent
They make this chart more complicated than it should be.
You're assuming that your residual nitrogen plus your actual bottom time, for your subsequent dive, falls into a no D dive. If it exceeds the limit for a no D dive, you have to take decompression stops as indicated by your deco meter or the US Navy decompression tables, correct?
+kjatexas that is correct. We teach recreational divers and as such we do not want them to ever incur a decompression debt. They should always plan their dives to be non deco dives. The table we showed on this show was the PADI Recreational Dive Planner (RDP) tables and these are not designed for technical diving or deco diving. Thanks for watching and thank you for your question!
This video is old but I’m wondering if you could answer a question for me… On your repet table, why are you penalized more (larger RNT values) for shallower dives than deeper dives. You subtract that number from your new NoDeco limit to find your new repet dive time, but the numbers are larger on the left side of table three (shallower repet dive) than the right side (deeper repet dive). It should be the other way around or I’m missing something important. We’re using an older table layout here, but X values are depth, and Y are repet letters.
Hey! Nice video!
What if I do a third dive?
Is the same process as the second?
Thanks
Yes. Each repetition you use the same method. Thanks for watching!
Mahalo!!!!
Why isn’t there a safety stop after the first dive?
I've been saying it for years. Chart 3 only confuses ppl by adding an extra step.
comment for the youtube
the only issue i have with these tables and my computer is who are these numbers based on.
i know higher end computers actually ask info about you for example age
does everyone no matter age, body type, physical ability etc off gas at the same rate?
The initial dive tables developed by the US Navy were developed wirh an 18 year old healthy male and different number of tissue compartments for decompression. The RDP was developed to address the needs of the general population with a different number of tissue compartments and decompression halftimes. These in general addressed the need of recreational divers. These tables were developed with the “average” recreational divers in mind. In fact many of the computer decompression models are based on the RDP model. You are correct though every individual has different physiology and may not fall within the average grouping. Hence why yearly we see some divers who follow a dive plan exactly but still become bent. We know a lot about decompression theory but can’t always predict when some individuals who may do everything exactly correct still develop DCS. It’s one of the risks we accept as divers.
@@everythingscuba just curious. is there a faster way to off gas. we know you're not supposed to work out after diving. could slowing down your metabolism be a faster way to off gas. i'm a conservative diver and try not to push any limits. i don't like diving in cold water so rarely go deep.
Well rebreather and technical divers can speed off gassing to some degree by using higher oxygen content gases as they get shallower to create a larger diffusion gradient, obviously never going above the contingency PO2 of 1.6. Out of water not sure of other mechanisms to speed off gassing, (other than breathing pure oxygen, which could become expensive). Decompression and off gassing varies by diver and by tissue type.
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But: KOIK! (Known only if known). In advance, do I know how deep I will be going? (How deep is the reef since I have never dived at this place? KOIK) How long will I be there (How long does it take since I have never done this route before? KOIK) For the second dive, same KOIK: depth is unknown, time to swim it is unknown, and the Total is never used. (Why is that? KOIK) (example of KOIK: Question: Where does John live? Answer: He lives where Bill's house was before it burned down 50 years ago after which it was replaced with an apartment building. KOIK. Can't know where John lives without already knowing where Bill lived before the fire took it out and was replaced by an apartment building which I don't know about. So, fill in the unknowns, especially the total down number which is theoretical and not used for any reason that was explained. (Just an academic number without a purpose.) An explanation of unknowns would be helpful. Thank you for a good presentation.
Great video, Just completed my IE and MSDT, very well explained!
Great video, when I had my OWD, I teached the table by myself, with helf of a video in UA-cam, because I thought it's useful to know how it works, I knew two or three dives on one day, is more then save, but I thought, I should know the table because, what if my divecomputer wouldn't work, but I really want to do another dive. So I could use this, I would be enough to go diving or to cancel.
I guess divers should learn the table, as a kind of backup divecomputer. 😯
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