Why is the max depth of Helitrox 150ft, while air goes to 180ft???????

[Blackcrusader]

You must have misunderstood. The maximum depth for air is 100ft / 30m.

Nonsense. Stop peddling your misinformation. I often do dives on air to 45m... never been an issue in over 40 years of diving. Different agencies teach different standards. 60m on air was common for CMAS, 50M for BSAC, 40m for Padi and others....

 

[Blackcrusader]

Helitrox has a max depth of 150ft while Extended Range (Air) has a max depth of 180ft. Since Helitrox is a Helium Oxygen blend with a 100% O2 deco gas why is the depth limited to 150ft? Why isn't it 180ft or even 200ft? Just curious.
And for those wondering, NO I will NOT be doing Extended Range on air. Many thanks.

It's really so that when you are deeper than 165ft and the Thresher Sharks are crusing at 200ft you still have time to get a nice video of them passing by.

 

[lostsheep]

You must have misunderstood. The maximum depth for air is 100ft / 30m.

For what agency?

I was told by my Padi instructor I could do 130’ on air.

I was told by my TDI instructor I could do 150’ on air.

I was told by my GUE instructor the MOD of air was 9’ (the depth of the training pool.)

Edit: DAN told me something different too!

 

[DiveLikeAMuppet]

You must have misunderstood. The maximum depth for air is 100ft / 30m.

Spotted the impostor! Air is for tires, it’s 32% between 0-30 meters (or triox if really rich).

 

[broncobowsher]

Spotted the impostor! Air is for tires, it’s 32% between 0-30 meters (or triox if really rich).

Nitrogen is for tires, air is for power tools. Although I have been guilty of putting nearly anything into tires. I knew a junkman that kept a hose on a propane bottle for filling tires, just needed them to roll one last time. I have not gone that far. But does starting fluid count?

 

[lowwall]

I knew a junkman that kept a hose on a propane bottle for filling tires, just needed them to roll one last time.

Big molecules do help with those leaky old tires.

 

[tursiops]

Nitrogen is for tires

I expect you don't really mean that, but people do say it a lot.

Should You Use Nitrogen in Your Car Tires? - Consumer Reports

CR uses tests and research to explain the benefits of using nitrogen in car tires and advises whether it is worth the cost to put nitrogen in your car or truck.

www.consumerreports.org

"There is a stronger case to be made for nitrogen for high-tire-pressure, heavy-duty applications, ranging from large commercial trucks to airplanes. But based on our experience with passenger cars and these test results, consumers would be better served—and would save their money—by just using regular air in their tires and checking them monthly."

 

[johndiver999]

I expect you don't really mean that, but people do say it a lot.

Should You Use Nitrogen in Your Car Tires? - Consumer Reports

CR uses tests and research to explain the benefits of using nitrogen in car tires and advises whether it is worth the cost to put nitrogen in your car or truck.

www.consumerreports.org

"There is a stronger case to be made for nitrogen for high-tire-pressure, heavy-duty applications, ranging from large commercial trucks to airplanes. But based on our experience with passenger cars and these test results, consumers would be better served—and would save their money—by just using regular air in their tires and checking them monthly."

I've filled my car tires with left-over nitrox many, many times. Haven't seen a problem yet.

 

[broncobowsher]

I've filled my car tires with left-over nitrox many, many times. Haven't seen a problem yet.

But trimix will bleed down a lot quicker. those pesky little He atoms will leak right through.

 

[tursiops]

I've filled my car tires with left-over nitrox many, many times. Haven't seen a problem yet.

Why would you see a problem? The only issue is whether you would see an advantage.....