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Here's a little anecdote about the idea of applying specific dogma to all situations. When I was a UTD diver and the organization was still very new, we were all absolutely required to use EANx 32 for dives shallower than 100 feet. Never, ever were we do use air. At one point, UTD released a...

It only takes a minute or so to change your GFs. If you are diving together as a team, you want to match everything as closely as possible. In the specific case provided in this thread, diving the different gases is not a deal breaker, but if you choose to do that, then you need to match...

One of the factors that led me to retire from teaching technical diving was the fact that for quite a while I was unable to get helium at any price, and I was the only source of helium for my students.

Not when you are diving as a team that needs to stay together.

Why do they have mismatched GFs? Does having different gases require you to use different GFs? In the deco dives I have done over the years, we try our best to get the same gas mixes, but when you are blending gases in a motel parking lot, it can be tough. We always discuss GFs ahead of time to...

So we go from a pretty simple, barely-into-deco dive to full on hypoxic with all sorts of other issues. That is just an absurdity. The "slippery slope" argument is a fallacy, and you are showing why. The fact that something makes sense in one situation does not mean it will make sense in...

Boy, I just don't see it as that big of a deal. If I had a buddy who had doubles filled with air and I had doubles filled with 32%, I'd do the dive. It's a pretty simple basic deco dive. I don't see why people are getting their panties in a wad over this.

What difference does it make? Evidently it happened for some reason, and the OP wants to know what to do about it.

Although it is always best to have teammates as near to identical in gas, if you find yourself in this situation, it is not all that hard to deal with. The solution actually applies to all deco dives, even when the gases are as closely matched as possible. Don't lie to the computer. If you have...

As an agency, TDI isn't DIR at all. I do know some TDI instructors who are also DIR, but that is an individual choice. The founder of TDI, Bret Gilliam, was very much opposed to George Irvine and the DIR philosophy in general. I talked with him about it years later, and he still went into a...

You will get answers to your question if you post in a different forum.

As you try to figure things out on your own, you may well get comfortable gaining bad habits. I just got back from a week on a dive boat, diving with two old friends and other people who were on the trip. One of the people on the trip came to talk to me because my friends had suggested she see...

Are you talking about training dives? Those limits only apply to dives being done while taking the OW and AOW classes. When you are on your own, the agency has no power to limit your dives in any way. Depth limits are up to you, local regulations, and/or the dive operator taking you on a dive.

A lot of people probably believe instructors are getting the bulk of the money they pay for a course. That is only true if you are working with an independent instructor. If you are paying a shop, the shop gets the money and then pays the instructor. That makes it very much like the systems...

Here is a copy and paste of a post I just made in another thread on this topic. ............................................... The ScubaBoard debate about if and when to take AOW has gone on as long as there has been a ScubaBoard. I think it is useful to look at the origin of the course. The...

The ScubaBoard debate about if and when to take AOW has gone on as long as there has been a ScubaBoard. I think it is useful to look at the origin of the course. The first real certification program was LA County's. They essentially copied a course created by the nearby Scripps Institution for...

Time to dust off an old favorite.

When I was working as an instructor for a shop and complained about the fact that I was paid far, far below minimum wage, the Director of instruction said that the law does not require them to pay instructors minimum wage, because they make up the rest with tips. I told him that the law does not...

Me, too. It happens. I had a really weird thing happen on one--and only one--of my dives. It may have been around my 1,000th or so. I realized during the dive that I was exhaling out of my nose a lot. I honestly could not stop doing it for quite a while. Then it stopped, and everything was back...

It is more than just removing the plugs. Modern yoke fill whip connectors attach almost instantly. DIN takes a l o n g time. If you have a number of tanks to do, the time difference between yoke and DIN is huge.