Nitrox benefits...

[nanadiver]

Here's an example that might help. Last year I was in the Keys on a 3-tank dive. We hit the Duane, the Speigel, and the Brenwood. I watched several of the divers on board sit out on one of the dives because they were diving straight air. I planned my nitrox blends to allow for two good dives on the wrecks and still was able to do the shallow dive on the Brenwood on air. Worked great. Take the class and use the knowledge to your advantage.

 

[pilot fish]

Question, if divers are using nitrox and using the air tables for an extra measure of safety, won't the air tables give them more MOD? Is the safety factor in using less BT that the air table would give you? I'm confused

 

[Jason B]

Question, if divers are using nitrox and using the air tables for an extra measure of safety, won't the air tables give them more MOD?

it's the gas in the cylinder that determines the MOD, not the table used.

Is the safety factor in using less BT that the air table would give you?

yep, less nitrogen loading.

Jason

 

[pilot fish]

it's the gas in the cylinder that determines the MOD, not the table used.

Jason

Yeah, that much I know but if they are using nitrox while using air tables how does that increase the safeety margin? Still confused :06:

 

[Jason B]

Yeah, that much I know but if they are using nitrox while using air tables how does that increase the safeety margin? Still confused :06:

Sorry, I was editing my post to add that as you posted.

Jason

 

[pilot fish]

Sorry, I was editing my post to add that as you posted.

Jason

To add what, Jason?

 

[jbisjim]

I like the big yellow and green EAN sticker on my tank. ;-)

 

[The Kraken]

Yeah, that much I know but if they are using nitrox while using air tables how does that increase the safeety margin? Still confused :06:

If you are diving on Nitrox and using air tables, you are incurring less nitrogen loading at the depth at which you are diving. The reduction of nitrogen loading effectively reduces the apparent depth at which you are diving. The relationship between your EAN mix and your nitrogen depth gives the basis for the determination of your EQUIVALENT AIR DEPTH.

For example, if you are diving 36% O2 and an actual (nitrogen) depth of 50 feet and utilizing the air RDP, your EAD, or the rate at which you will be nitrogen loading, will be based on a depth of 34 feet.

The resulting reduction of nitrogen loading by diving a nitrox mix and using the air table RDP will result in an increased safety factor by theoretically reducing the rate of onset of DCS.

 

[pete340]

Yeah, that much I know but if they are using nitrox while using air tables how does that increase the safeety margin? Still confused

With air at 60 ft. the NDL is 55 minutes. With EANx32 at 60 ft. the NDL is 90 minutes. If you dive EANx32 and limit yourself to 55 minutes (i.e. use the air table) you get less nitrogen than you would with air for 55 minutes. Some people think this is "safer". DCS in recreational diving is so uncommon that this "improved" safety is pointless. (You do, though, have to remember that the MOD with EANx32 is 110 ft, and even though the air tables allow you to go deeper, you shouldn't do it)

 

[pilot fish]

If you are diving on Nitrox and using air tables, you are incurring less nitrogen loading at the depth at which you are diving. The reduction of nitrogen loading effectively reduces the apparent depth at which you are diving. The relationship between your EAN mix and your nitrogen depth gives the basis for the determination of your EQUIVALENT AIR DEPTH.

For example, if you are diving 36% O2 and an actual (nitrogen) depth of 50 feet and utilizing the air RDP, your EAD, or the rate at which you will be nitrogen loading, will be based on a depth of 34 feet.

The resulting reduction of nitrogen loading by diving a nitrox mix and using the air table RDP will result in an increased safety factor by theoretically reducing the rate of onset of DCS.

Gotcha .Thanks