Thank you for the videos! This video and your "magic circle" video leave me feeling far more educated than the eLearning portion of my EANx class did. Great job explaining things clearly and simply.

@LakeHickoryScuba

4 жыл бұрын

You are very welcome Cheetah223, glad to know our videos are helpful and educational.

I’m learning and understand more from you than dive instructor. Especially the magic circle theory Thank you Brian 👌

@LakeHickoryScuba

Жыл бұрын

Hello Kevin Tipene, glad you like our videos and find the helpful to you. Let us know if we can ever help you out.

you Sir are a Gentlemen and a Scholar!

@LakeHickoryScuba

3 жыл бұрын

Thank You Signalsoldier.

Ran across this, this is good stuff !!!

@LakeHickoryScuba

2 жыл бұрын

Glad you liked the video jackjackattack.

Dude you killed it! Thanks for that, i was stuck on stupid until heard you explain it.. God bless you!

@LakeHickoryScuba

4 жыл бұрын

You're welcome SCI Culebra Snorkel with Locals, glad you found the video helpful.

My thoughts are with you and yours during this storm period

@LakeHickoryScuba

5 жыл бұрын

Thank You. We are at the base of the mountains, basically the foothills, so hopefully the wind won't be to bad. We are worried about the water and rain though.

Well, I can no longer say that I won’t ever use algebra in life.

@LakeHickoryScuba

5 жыл бұрын

Very True.

Very Helpful!

@LakeHickoryScuba

4 жыл бұрын

Hello Tana, glad to know our video is helpful to you.

I’ve been watching the heck out of your videos they’re good where can I get one of those charts like you have at the end of this video

@LakeHickoryScuba

Жыл бұрын

Hello RICHARD SKUTA, if you are referring to the SSI Dive Tables. There is a free download on the app store called, MY SSI. Once you have downloaded it, create you a free account, and you can find the tables under the tables section. Here is a quick link to help you register your free account. my.divessi.com/register

Hi Brian, your constant follower from Jeddah, Saudi Arabia and I am currently studying as a diving guide. Very nice explanation. A question arose when I watched the clip. I saw you round the number to decimal places. SSI table (we have the metric system). If there is no number in the calculations that matches the depth numbers in the table, do we jump to the higher number, or take the lower depth for safety precautions? . With thanks for your great effort

@LakeHickoryScuba

2 жыл бұрын

Hello Sniper Hunch, rounding up on the tables is ok to do, and this is what we teach our students to do. Even some computers will round up on the plan screen.

Great video!! Does this work for metres or is there some other equation? I’m guessing the 33 in the equation is 33ft which equals 10 metres. So if I minus 10 instead of 33, is the equation still valid?

@LakeHickoryScuba

5 жыл бұрын

Hello Chris & Carolyn Case, you would be correct. To calculate in metric you simply use the incriments of 10 meters instead of 33 ft (sw) / 34 ft (fw).

@marinepilotchris3048

5 жыл бұрын

LakeHickoryScuba thanks so much!!!

@LakeHickoryScuba

5 жыл бұрын

You're welcome.

does the equation still work if you are using meters instead of feet?

@LakeHickoryScuba

5 жыл бұрын

Great question John. Simply by replacing the variable 33(fsw) with 10(msw), the equation would still work out.

now can you make the same video using the metric system for european divers?

@LakeHickoryScuba

3 жыл бұрын

Hello eli klien, we will do our best to start integrating metric into our videos as well.

I'm taking the Academic section of my nitrox class and the formula is different a I'm getting different numbers. Can you help me? [(1- fo2)(D+10) / 0.79)] - 10

@nicolebradford9154

3 жыл бұрын

Would.it be 58.35 if using the same D and blend? I think I caught what was different fo2 is oxygen while fn2 is nitrogen, correct?

@LakeHickoryScuba

3 жыл бұрын

Correct the FO2 stands for the fraction of oxygen, and the FN2 stands for the fraction of Nitrogen.

Those SSI tables look better than the multiple PADI tables.

@LakeHickoryScuba

3 жыл бұрын

Hello Caleb Mcelhaney, we find that the SSI tables are very easy to read and helpful to all divers.

Love the math but i think u were a math teacher in a previous life

@LakeHickoryScuba

5 жыл бұрын

I’ve always loved math and science growing up.

Brian Memorizing a formula is one thing-- but understanding it is another! It is clear that 80 feet is 80/33=2.4 ATM +1= 3.4 ATM total USING 40% O2-then ppO2= 0..4x 3.4= 1.36ATM and ppN2= 0.6 x 3.4= 2.04ATM FROM YOUR EXAMPLE 53 feet is the EAD? 53 feet is 53/33= 1.6 ATM +1=2.6 ATM TOTAL USING AIR 21%O2-then ppO2=0..21x2.6=0.546ATM and ppN2=0.79x2.6=2.1ATM SOOO- with 40% O2 EANx at 80 feet= ppN2= 2.04 ATM (see above) AND- at 53 feet- using AIR- -----ppN2=2.1 ATM I S THIS WHAT MAKES IT THE “EQIVALENT AIR DEPTH”-- the eqivalence of the pp of N2?? -------------- Your equation divides the “mix” N% by “air” %N=== this gives you a raw number that is essentially the less % of N - in your case- 0.6/0.79=0.76=== to me- showing your only using 76% of air nitrogen! Then you multiply that by “depth + 33”-- which to me is essentially the total ATM IN FEET? You then subtract 33 to just give water depth - essentially removing 1 ATM- of air? Soo-- I have no doubt that you are correct-- but what actually is being calculated on a deeper level- sure- it is easy to memorize formulas- but understanding why and what that formula means is much better! So- I ask- in simple words- WHAT DOES AND EAD ACTUALLY MEAN? Other definitions simply state it is ppN- at one depth versus another- please say in a simple way- Really enjoyed your lecture on EAD- memorized it- but still wondering about it!!! Buzz

@LakeHickoryScuba

Жыл бұрын

Hello Buzz Morse, in short the EAD formula allows a diver to use standard air tables to calculate Nitrox dives. Basically, you can convert any Nitrox blend back into a standard Air Blend to calculate your no decompression limit. The SSI Air and Nitrox Tables, and most other agencies allow both the standard Air, 32%, and 36% tables to be used, but there are no tables for other mixes. Diving in 2022, all divers should be using a Dive Computer which eliminates the need for this calculation at the recreational level. Back in the early 1990's, Dive computers were not a necessity as they are today, so teaching the EAD was very important when diving Nitrox without a computer. Constantly calculating our Oxygen clock was also very important. Now days, dive computers do this for us, not to mention calculating our partial pressure of PPO2 at any given depth, and a plethora of other things.

Nice video but feet really do not make sense in diving

@LakeHickoryScuba

3 жыл бұрын

Hello Alessio Andreoli thanks for the comment. Truth be told, it would be very difficult to use scuba fins if you didn't have feet. LOL