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View Full Version : Opinions on Nitrox cert


Patchmty
03/23/2015, 04:30 PM
The gf and me are heading to Playa del Carmen the first week of April. She's getting OWD and I was thinking of getting Nitrox cert. But I'm wondering if it's really worth it. How much extra time does it really give you?

snorvich
03/23/2015, 04:50 PM
In my opinion, that certification is worth while for more than just the time available issue.

skiwez
03/23/2015, 05:07 PM
I don't believe dives are involved anymore for Nitrox cert. But the information learned is certanly well worth it. In my opinion fwiw learning why nitrox and the safety benefits is more important then extended.bottom times. There is alot of.good info.to learn, bht applying it is the critical.step. Dive computers have made diving.easier especialy with nitrox, but not necesarrily safer

Patchmty
03/23/2015, 05:46 PM
Yeah, no dives required, but they do offer 10% discount and free Nitrox on all dives after the cert during that vacation.

Captain smoke
03/23/2015, 06:40 PM
I would say no, its not worth it. I am an TDI tech diver ADv nitrox and Deco.. For vacations with cattle boats nitrox is a waste of money IMO. Nitrox gives divers more bottom time and limits depth, so your on a vacation diving from a cattle boat with everyone else on air 21% and your told to keep together. So when the first diver gets low and has to cut the dive so does everyone else. (remember Buddys) Now if you can plain dives with other nitrox divers when you can plain your dive and depth then yes its well worth it as long as your in the 65-150ft Tech diving range with technical gear. When I go on vacation to Mex I just get 21% on the cattle boats. Now when I did cave and deep dives you bet your as* I got nitrox but that was with a private guide.

Remember

PatW
03/23/2015, 07:05 PM
Nitrox has advantages and some disadvantages. At 32 percent, you are limited to something like 105'. However, you will take less of a nitrogen load and it is an advantage if you are doing 3 plus dives per day over a week. Nitrox is often standard on live aboards. Most boats will allow you to dive your own plan if they deem you competent to do so. There is usually a set max time for most dives of an hour which you can extend a bit by being the first in and last out.

Kenmx10
03/23/2015, 11:17 PM
If your diving once a year on vacation, its probably not going to make a difference because your not going to be using it. If its something your want to do a lot of, Its definitley worth it.
A 80' max bottom time on 32% nitrox is 36 min. On regular air its 25min. With 36% its 46 mins. So that gives you an idea on the times.

It also extends your repetitive dives which can drop drastically with short surface intervals on regular air. On shallow dives your probably gonna run out of air before bottom time so its not gonna really matter, I still prefer to up the oxygen and reduce nitrogen.

r-balljunkie
03/24/2015, 03:54 AM
Get the cert.

Its an easy class, a bit of reading, 2 hours of classroom review, quick practical and you are done.

Never have to take it again, and its a good insurance policy to have in your back pocket if you decide to keep diving.

Nobody asks to see your wreck course or deep dive course PADI certification, however they will ask you for your nitrox cert.

I put off nitrox for a long time because i thought it was gimmicky. Now i usually dive 28% which covers the range of recreational diving just fine.

We do wrecks here that are often around 90'-130'. 8 extra minutes of bottom time is worth it.

You also feel a bit better physically afterwards.

Patchmty
03/24/2015, 01:55 PM
I guess I'll get the cert then. Worst case scenario is it ends up being a resume padder. 😀

snorvich
03/24/2015, 03:45 PM
You also feel a bit better physically afterwards.

This for me was the primary benefit. Although knowing about oxygen toxicity is a useful thing.

Mr sea water
03/24/2015, 04:12 PM
Yes I like nitrox 32, yes 34m at po14 but it is safe for 41m at po12, I also use it on the way back if I dive deep. I take comp air 21 and nitrox 32 if I dive 56m I change to nitrox at 28m so I clean up quicker. Yes deco diving it's fun!

Deinonych
03/27/2015, 09:19 PM
I always dive Nitrox - EAN32 on my first (deep) dive, and EAN36 on the second. I like reef and wall dives, so the depth limit isn't a factor. Pretty much the only times I dive are on vacation, and typically multiple dives over multiple days. I like the safety factor primarily.

daplatapus
03/27/2015, 10:50 PM
I have to agree with the several guys who experience feeling better after a dive. I don't feel any where near as tired after than when I dive on air.

gazmarine
03/28/2015, 11:38 AM
I found the greatest benefit with using nitrox, was when doing a lot of repetitive diving, on live a boards.

rjallen
03/28/2015, 03:58 PM
I may be stating the obvious but this is aimed at new scuba folks. Nitrox is a very useful tool under certain conditions but quite dangerous for general use. If you are diving where the max depth is less than the 120-100 ft range [depending of the Nitrox mix] AND YOU CANNOT POSSIBLY GO DEEPER, as already said, it adds BT and shortens SI or it can add a safety factor by using Nitrox with air deco schedules. This is sometimes done by older divers on multi-day, multi-dive days such on a live aboard. This gives the slow tissues a little leeway. I would not allow a diver into the water with Nitrox on a wall dive or say to the topmost part of a deep wreck dive. The danger of accidentally exceeding the max depth is too great. Now I understand that some dive operators do allow this but I still have a problem with it. In addition Nitrox, should be used in dedicated cylinders that are clearly marked with Nitrox and the mixture. While not current on the most recent standard of practice we always required a tank to be completely emptied if changing mixture. We also would do the same with a visual inspection, surface cleaning and valve overhaul when switching tanks to and from air/ nitrox service.
We also did some mixed gas dives [leading edge back then and this was before recreational use of rebreathers] and used O2 for decompression. Lastly, I have observed fill stations operated by untrained operators with poor maintenance practices offering Nitrox. Of course I have seen questionable air stations as well. We had some very expensive gas testing equipment to test our mixtures. Would like to know what this equipment costs these days? Its been awhile since I was active in the industry but I am sure the basics have not changed much. Good diving!

RJ

Patchmty
03/28/2015, 04:20 PM
I dive mostly in Cozumel and Playa del Carmen. So I think the max depths are usually not exceeded

acrohead500ppm
03/28/2015, 05:06 PM
Thing I always gripe about when going with some operators that make you surface with the rest of the group which really kills the point of it in that situation.

I have noticed though that I too don't feel the "dive hangover" at the end of the day after going through a few tanks.

Helps not feeling so fatigued so when on vacation (when I primarily get to dive), you can still go out and enjoy the night life and what not ,without feeling so exhausted.

Mr sea water
03/29/2015, 04:19 AM
I may be stating the obvious but this is aimed at new scuba folks. Nitrox is a very useful tool under certain conditions but quite dangerous for general use. If you are diving where the max depth is less than the 120-100 ft range [depending of the Nitrox mix] AND YOU CANNOT POSSIBLY GO DEEPER, as already said, it adds BT and shortens SI or it can add a safety factor by using Nitrox with air deco schedules. This is sometimes done by older divers on multi-day, multi-dive days such on a live aboard. This gives the slow tissues a little leeway. I would not allow a diver into the water with Nitrox on a wall dive or say to the topmost part of a deep wreck dive. The danger of accidentally exceeding the max depth is too great. Now I understand that some dive operators do allow this but I still have a problem with it. In addition Nitrox, should be used in dedicated cylinders that are clearly marked with Nitrox and the mixture. While not current on the most recent standard of practice we always required a tank to be completely emptied if changing mixture. We also would do the same with a visual inspection, surface cleaning and valve overhaul when switching tanks to and from air/ nitrox service.
We also did some mixed gas dives [leading edge back then and this was before recreational use of rebreathers] and used O2 for decompression. Lastly, I have observed fill stations operated by untrained operators with poor maintenance practices offering Nitrox. Of course I have seen questionable air stations as well. We had some very expensive gas testing equipment to test our mixtures. Would like to know what this equipment costs these days? Its been awhile since I was active in the industry but I am sure the basics have not changed much. Good diving!

RJ
Hi I agree with what you are saying, we have done a lot of diving in Egypt last year, 3 months dived nearly every day and did two to three dives a day. I have a
Analox nitrox analyser, I test all are cycls I ask for nitrox 32, I found some to be nitrox 26, there was for three months a lot of bad feeling at the gas station. We want what we order nothing else. I want to dive where I want when I want a alway pay and go private so it's not asking to much and we buy 80 dive packages at a time to start off. Yes you need plan dives being old I need more air so I always take two bottles. And always dived with Old US navy dive tables I think less conservative for today's use. My computer tells me!

tkeracer619
04/10/2015, 01:14 AM
This for me was the primary benefit.

Me too, I don't have the cert but it's next on the list.

snorvich
04/10/2015, 04:26 AM
Thing I always gripe about when going with some operators that make you surface with the rest of the group which really kills the point of it in that situation.



A reason not to go with operators that enforce group diving?

r-balljunkie
04/10/2015, 05:07 AM
A reason not to go with operators that enforce group diving?

Agreed. I've always been lucky....The DM's usually ask questions gaging levels of competence early on. I kindly explain that I dive every damn weekend for the better part of the last 5 years and crack a joke about being a master-snorkeler, good for laughs.

I bring my photo rig with me, which always draws some gawks....little do they know its a poor boy setup.

With this said, I get a pass on having a buddy and get to lag behind the group a bit to take pics, or get paired with a loose DM who is kind enough to keep an eye out for nudo's or other photo ops.

snorvich
04/10/2015, 08:54 AM
Agreed. I've always been lucky....The DM's usually ask questions gaging levels of competence early on. I kindly explain that I dive every damn weekend for the better part of the last 5 years and crack a joke about being a master-snorkeler, good for laughs.

I bring my photo rig with me, which always draws some gawks....little do they know its a poor boy setup.

With this said, I get a pass on having a buddy and get to lag behind the group a bit to take pics, or get paired with a loose DM who is kind enough to keep an eye out for nudo's or other photo ops.

An OWSI card helps. A photo finding DM would be a boon but infrequently available. Photographers are a pain to hang with.

kwsjimmy
04/13/2015, 03:12 PM
Another great thing about nitrox diving, somehow you always get out of the water wide awake and ready for more doving

Patchmty
04/13/2015, 03:15 PM
Well, I got the cert with CenoteXperience in Playa del Carmen. Had a great time, will definitely go diving with them again.

Deinonych
04/19/2015, 04:32 PM
a reason not to go with operators that enforce group diving?

+1

ScuderiaTech
04/28/2015, 10:38 AM
I have my nitrox cert and definitely appreciate it after a physically active dive. If you plan on doing a lot of diving i'd recommend it.

PatW
05/25/2015, 07:45 PM
I don't notice any difference between diving nitric vs air as far as fatigue goes. Nitrox is quite useful in mid level dives because your nitrogen load is less. It is especially helpful if you are doing a bunch of mid level, 50'-100',in multiple dives per day. Nitrox is very popular on live aboards where one does 4 plus dives per day.

Diverjohn
06/11/2015, 12:43 PM
I have noticed that fatigue doesnt seem as bad on nitrox. Used it will diving in Roatan doing 4-6 dives per day and didn't get nearly as worn out as doing 3 dives with air. Would agree with others that it's better diving it when not in group dive, but I have seen people use it in group dive just because they say they don't feel as bad after the dive.