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Yooper, the link doesn't work. They had the best tank prices since the birth of Jesus. Are they still in business?

The woodie is a good gun. I'm curious about the "floatie". Are you scuba diving or freediving? So Riffe is using Kevlar for their wishbones. That has got to be better than that nylon string they originally used. That stuff would fray pretty quick. Suggest you replace your shooting line with...

Bill and Neal, those were good posts. Times are changing, and the capabilities of Scuba equipment and boat facilities to handle HP are moving right with them. Bill, I'm curious about the comment on corrosion and carbon steel. Traditionally, alloys known as carbon steels were only used for...

Dr. Paul, I've shown that there is no theoretical problem down to 40 meters starting with a partial fill of 100% O2, and air as the diluent. Substitution of O2 with Nitrox does not change this. I was prepared to suggest this very thing but started with a worst case approach, and the result did...

You guys are right. Yes, the patches were withdrawn for Q problems. My friend was able to get them once the problem was resolved. Years ago, I had heard they were available over the counter, but withdrawn for the above reason. Must have been bad info or bad memory. I probably just assumed...

On the water that is. This is not a trick question. While reading the board I've seen some interesting comments about splitfins; to wit, a diver cannot thrust as high above the water as with paddles. This comes into play when reaching for a ladder or platform, or pranging a seagull which has...

Jet, the relative volumes of specific gases will always be those specified for the mix. True, there is no corresponding volume and pressure for different compressed gases. Some pack more free gas volume, and some less, even when measuring identical tank pressures. The mixers adjust volume by...

What the heck does that mean? Maybe the docs will know. Perhaps some positive air pressure has developed and is being blocked? That would mean swelling. All kinds of respiratory problems, except TB, seem more common today. It seems to be related to the unusually clean environment and...

That one has been beat around a bit. Outside of an expensive, military knife by Phoenix(Spain), I don't know of one that avoids all of the issues above. I never heard of a K3 knife and I don't know what the Minnesota link is all about. I would like to hear more though. I often wondered why...

A "juvenile mouthpiece"? I had two of those but they grew up and went to college.

Still under pressure? The inner(oops, middle) ear is a mysterious thing. The eustachean tube, in particular, seems to react to seemingly minor stimulus. I have what's known as "tubair voluntaire", or something like that. In other words, I can voluntarily open the tubes anytime, instantly, just...

Dr Deco, thanks for confirming the number. Yes, we're aware, those pesky details are still sitting in the wings while waiting for us to work through the gas law. (G)

Bunny, a snorkel vest is not the same thing as a semi inflatable lifejacket. The snorkel vest has no inherent buoyancy unless some air or gas is blown in (Otherwise, it wouldn't be possible to submerge). A snorkel vest slips over the head and is secured by a waist strap. It lays absolutely...

My buddy uses Scopalamine for seasickness. The patches are available over the counter. They were hard to get for a while due to some FDA objection.

Warren, don't sweat the gas laws until you get into class. These have nothing to do with tank selection, but it is a fact that it is easier to fill a LP dive tank from a LP oxygen or helium tank. This makes mixing more practical. Helium is less compressible than oxygen so the PP's can't...

Arnied, the steel 72 is a nice, light, all around tank for rec dives. It actually holds about 66 cu ft unless you fill it to 2475 psi where it's capacity is 71.2 cf. This is about 6 cf less than the bulkier aluminum "80". On average, I'd expect about 45 minutes at 60 feet, that is if you are...

Bunny, forget the SCUBA diving. I suggest that you and your family rent a cabin or other accomodations on the island of St John, in the US Virgin Islands. Much of the land and inshore waters are national park and have some of the best snorkel diving in the world. There are shore activities also...

I like the looks of the design(thanks, Rick). This reg has a pilot valve so I guess there are some teeny, tiny parts in there. Looks to be light as a feather. Lexan is a tough plastic so there shouldn't be any cracking over time.

Wa'll, shut my mouth. You might want to take a look at the side breathing Oceanic Omega which is discussed on another thread. That thing is light as a feather and has an "ortho" mouthpiece, but I don't know how big it is.

Well, I did a back calculation to see how much O2 would have to be added to the counterlung while on the surface. The dive is to 5 atmospheres(A). The diving set is calibrated for a PP/O2 on the bottom of 1.4 atm. It is assumed that no oxygen is consumed on the descent, so I guess we best make...