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It does not literally disappear. I have dived to a maximum of 97 m/320 feet in the ocean, and at that depth, everything looks blue/gray, but the yellow gear stands out in contrast. It doesn't look yellow, but it still stands out. On our second dive today, we did a 93 minute drift dive, with a...

My wife and I ate at El Moro tonight. We hashed out our history there. Our first time was in 1997, and we were there regularly for the next 15 years. It was our favorite restaurant, and we even got to know the family a very little. Then it all ended. Since 2012, we have been to Cozumel only a...

In addition to what Lowwall wrote, a GF low value of 40 is not exactly risky. For an NDL diver, it just isn't optimal. If the newbie were to go into deco by the little bit typical of a newbie who overstays NDL, a short stop--maybe a minute--deeper than normal might be required. Not only that...

Well, I think you have things reversed. Copying experts (which I do myself) does not make you an expert. I was talking about people who are experts on their own otherwise demonstrated expertise, like Dr. Simon Mitchell.

They gave us a can of repellent, or else we would have had to leave. We are planning to go to Casa Mission at some point.

Yes, you are correct that this is only one person's opinion, but that is one pretty significant person indeed. I would bet that a lot of people started thinking along those limes right after that article came out. I know that pretty much everyone I dive with was persuaded. Almost all of the...

So I came here looking for restaurant advice, and I find a discussion on the Pub. The noted drop in interest in this forum is by no means unique--it is happening in forums all over ScubaBoard. I created the Rocky Mountain forum a couple decades ago, and for a while it was hopping. It is now...

I don't see any setup issue with using a long hose setup with a conventional BCD. I began using the long hose setup when I started technical diving, but for quite a while I stayed conventional for recreational diving using a ScubaPro Knighthawk. Then I decided that was stupid and went with the...

If you overrun your NDL and have a deco requirement, you should ascend at the rate your computer calls for and do any required stops below 6m/20 feet for the time the computer tells you. It won't necessarily hurt you to extend a deeper stop, but it may end up requiring a longer shallower stop...

Lowwall's correct response suggests to me that there might be a more fundamental misunderstanding at play here. Forgive me if I misunderstood and am explaining something you already knew. There is always nitrogen in your body. Right now you are breathing in air, which is about 78% nitrogen, and...

You won't want to read what follows. I had a student who came to me for almost exactly the same purpose you are describing. I taught him to use a drysuit, to have excellent buoyancy control and non-silting kick techniques. It took a few years, but by then he was looking really good. He was even...

I haven't dive the Blue Hole in something like 15 years. When I did, at the end of the dive, after we were all back on the boat, the crew threw a lot of fish scraps off the stern of the boat, creating a significant feeding frenzy with the Caribbean reef sharks who were obviously expecting it.

The Air 2-type system has deficiencies that have been noted in this thread. The bungeed alternate does not have those deficiencies. Comparing the two, the only advantage of the Air 2 is one less hose, and I fail to see much benefit in that missing hose compared to a short hose lying on the right...

I dove for many, many years without anything close to DCS, and many of those dives would be considered aggressive. Then one day I did a 2-tank dive within NDLs, and, just on a whim, I took an oxygen bottle I had on hand and used it for the safety stops. I should have been very safe, but I got...

About 10 years ago, I went on a day boat dive on the Great Barrier Reef, a trip that required a very long trip from shore. During that trip, our assigned DM gave a dive briefing that pretty much reviewed the entire OW course, after which I took her aside and showed her my gear, with its 7-foot...

I would like to relate an irony about this topic regarding my own switch. I have been on ScubaBoard for 21 years, and when I started I was a typical OW diver with not much more than 100 dives. I was diving a typical regulator setup. It was about that time that I first encountered the whole BP/W...

As I suggested earlier, I made the switch in my recreational diving as soon as I realized it was a better system. I suggest that would be the time for anyone to make the switch. If you think it is a better system, why not switch to it?

There is no concern abut switching those hoses. https://www.scubaschool.org.uk/wp-content/uploads/2016/06/EN-250.pdf

For most recreational diving, I use the system described by Tursiops in post #2. The key point for me, though, is not the long hose. It is the bungeed alternate that goes with it. I first started diving the long hose when I took tech training, but I at first did not switch my recreational gear...

What follows is a simplified explanation of it all that I hope will help. Nitrogen molecules enter and leave the tissues continually. Before a dive, presumably we have been at the same altitude long enough that things have averaged out--we have on average just as many nitrogen molecules...