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In some places, DMs are required by local law. That is true in Cozumel, for example. On technical dives in Cozumel, you need to have a DM, just as you do on NDL dives there. The key thing here is your dive guide will not have liability insurance, something that is required for a currently...

Assuming the course has not changed since I retired, the lack of true skill building in laying and retrieving line is a glaring weakness in the course. If you plan on running line in a future wreck penetration, I suggest you either work hard independently or you take a cavern course, where the...

I have never heard of this before. I don't think you have to include this as a consideration.

Unless things have changed since I retired, working with a reel is part of dive #3, and there is nothing in the standard about being blindfolded. Under PADI rules, the instructor cannot require you to do the blindfold skill successfully in order to complete the course, since it is not part of...

I think some people are misunderstanding the original post. He was practicing the skill in open water, not on a dive in a wreck. He was asking for tips on handling the reel better. He was not asking about what to do if he was running out of gas while using the reel in a wreck.

You have to be careful using the word "penetration." I discovered in a discussion with PADI that when they used that word, they were referring to entering the wreck at a point and returning to that point for the exit. Entering at one point and exiting at another is a swim-through, and (at least...

Here is what you are saying now: My issue is not with the computer, the algorithm or the GFs. My issue is with the acclimatization of a new diver at basic level scuba diving with transition to dive computers. A dive computer with a simpler algorithm interface is going to be easier for the diver...

This is very nearly 100% different from what you were writing a few pages ago.

I went to your profile page and learned nothing of your current situation that would help me provide advice specific to you. If you give more information about yourself, people can give better advice. USDiver1 asked an excellent question about being associated with a dive shop. If you have an...

As people have already noted in the last couple of pages, the fact that the OP was confused about safety stops does not say anything about the concept of GFs as the Buhlmann system for setting a level conservativism on the computer. The fact that how to use GFs appears in articles about tech...

My first serious dive trip, nearly a quarter century ago, included a liveaboard trip to the GBR One of the divers on the trip was a Japanese professional marine photographer, a remarkably skilled diver. He had thousands of dives logged, and he took meticulous notes after each dive. I took him as...

I have done many, many times over nearly 30 years. I will be doing it again next month. My wife is a non-diver, and she has been with me enjoying herself on all but a few trips--liveaboards at locations too deep for her to enjoy snorkeling. She snorkels regularly, or she finds other things to...

I don't know why this has not been mentioned before, but before this thread, I never encountered anyone claiming that GFs were created specifically to be used for decompression dives and not NDL dives. I have read Baker's work and don't see any hint of that. Could you show me where I missed it...

So what is wrong with using them in NDL diving? The only reason you have provided so far (GF lo settings cause you to have to do deep decompression stops while still on a NDL dive) is simply not true. You have not responded to repeated questions asking how using GFs on NDL dives differs from...

Which dive agencies do not offer a variety classes? Similarly.... I need to paint a room in my house, so I went to the paint store. Can you believe it? That store was selling all kinds of paint colors that I don't need! I asked them why, and they acted like I was crazy. They told me that...

Here in Colorado we are limited in what we can do on an AOW dive. I encouraged the students to choose the altitude specialty because there is absolutely nothing to do on the dive. That gave me the freedom to focus the entire dive on the skills I had noticed they needed to work on. You might see...

Night diving in South Florida is commonly done as a shore dive. A night dive at Blue Heron Bridge is a great experience. There is not all that much penetration in the course, but you learn to do it safely. Wreck diving is a major part of the normal dive activities in South Florida. This is...

LanceRiley is correct on this. I once had two tanks with different blends, and I wanted them to be alike. I connected them with a transfill whip and left them connected for 3-4 days. When I tested them after that, they each had the same blends they started with. Whatever mixing had happened was...

When I was discussing pressures, I was simply trying to use clarifying language for the general population. When we normally speak of pressures, we think of something like the water pressure in our house sending out spurts of water. We think of something that provides a push. In my experience as...

No one said that.