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Years ago, on a whim, I bought one of PADI's eRDPml electronic dive calculators. I think I used it twice. Give me the printed tables any day of the week. Of course I now have a nice air-integrated dive computer, but I still use my RDPs before almost every dive. (I have air, EAN32, and EAN36 tables, plus a PO2/MOD table and an RDP-size slate, all in a nice bundle that fits in the pocket of my BCD.) Running the tables scares some students, but once you learn it you only need periodic refreshers to retain it. The nice thing about "old school" methods is that they just work. Thanks for posting these highly educational videos.

What I was looking for in a refresher. Thank you!

Just awesome Thank you so much

Oh yeah. Great one again. Now to win me a t-shirt.

thank you, this is clear and concise

Excellent video - well done, easy to follow and answered my questions. It's been 20 years since learning tables--- always used my computer but had to re-learn the for altitude course test! - thanks.

@everythingscuba

2 жыл бұрын

Larry glad we could help you out. We make our videos for divers just like you! Thanks for your kind words!

Interesting that the pressure groups and min SI are different to these values when using the metric tables... Out with EPG of P, back in with an SPG of J, having required a min SI of 28min.

Thank you . for this wonderful explanation .

excellent

Is it ever recommended to do a safety stop between bars? Why is a safety stop always at 15ft? Air seems to close to surface. Wouldn’t it be better between 30 and 20ft?

so wouldn't that mean as an I diver you only have 5 minutes actual bottom time before mandatory deco stop? why would residual nitrogen give you more bottom time?

would it not be safer to round down when finding the ADJ NDL? when he is on table 3, rounding up to 42 mins to group L, instead of group M?

@rolandsjegorovs86

Жыл бұрын

I think so too

I’m preparing for IDC. Do you any online classes or something that I can buy to get myself ready for IDC?

@everythingscuba

Жыл бұрын

That is something we are currently working on. We are prepping a large series of videos for Dive Theory and other topics within the IDC. Nothing fully finished yet unfortunately. Check out our other videos on Nitrox and the basic fundamentals of scuba diving for more theoretical reviews. Thanks for watching and good luck with your IDC!

140’ and 8 min … I’ve always been confused: Is that 8 min that I can stay at 140’ plus the time it takes to descend to that depth? (Probably not.) Or is that 8 min from starting the dive to reaching 140’ and then starting the ascent? Thank you.

@cwilliams6884

Жыл бұрын

i'm not an instructor but my understanding has always been that it starts from the moment you start the dive

@cecilm3720

Жыл бұрын

@@cwilliams6884 Thanks. That makes sense.

I was under the impression that after you have you adjusted pressure group after a surface interval, you then use your depth to figure out how long you can stay at that depth without passing your NDL. But you picked a depth and time to figure out your next pressure group. Why do it this way?

@bluefish4999

Жыл бұрын

I think it was just an example that you can calculate it that way if you wanted to, most likely you wouldn't.