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I've read something different. ICD typically happens on ascents when divers are switching from a gas with a low N2 mix to a gas of a richer N2 mix. Here is what I've read: ICD (Isobaric Counter Diffusion) can be caused by the absorbtion of one inert gas of high solubility while another inert...

I agree that listening to your body is good advice and can prevent a lot of emergencies medical or otherwise. But, I don't know how that applies to DCS. In my understanding symptoms of DCS don't appear until a couple hours after the dive. So, for dives that don't involve grossly violating deco...

^^^ this Also with correct weighting and proper trim your SAC rate will go down.

You say that the algorithms are only greatly simplified models. Yet, ratio deco is even simpler than those algorithms that employ logarithmic equations on data to several decimal places. In the 2006 printing (the copyright is 2000) of "Doing it right: The fundamentals of better diving" on page...

If you are diving with a buddy have the buddy swim ahead of you and remove the line from each secured point keeping the line taut while you continuously reel it in while swimming back. This will help prevent reel tangles. It's not hard but takes practice.

Another issue as to why you want to immediately go horizontal at the surface is the position of the weights in the weight pockets. If the weights have moved forward in the pockets they will cause you to rotate forward. Try this: lean back, grab your weight pockets and lift them up which should...

Thanks @inquisit for posting the graph above. I'd like to point out something that is not readily apparent on the graph. For a deco dive involving decompression stops the GF (gradient factor) at the stops changes incrementally from GFLo to GFHi. At the first stop it is GFLo. At the last stop, at...

Erik Baker's original idea when he introduced gradient factors was to make the entire dive profile more conservative and not just at surfacing which the GFHi controls. Introducing a GFLo made the first stop deeper and added additional decompression stops. The deeper stop had a negative effect in...

Here is something I posted awile ago on a different thread: The SurGF feature does provide an "on-the-fly" option to make the dive safer through additional off gassing at the safety stop or another depth. Keep in mind that the NDL calculation takes GFHi into consideration so that an ascent...

I'm a few years older than you and dive with 70/90 on my Perdix dive computer. Most of my dives are NDL but occasionally I do some light deco (less than 5 minutes). Generally speaking, NDL diving can tolerate a higher GFHi than deco dives. Everyone is different. There are many more factors that...

One problem with filming long scuba diving swimming scenes realistically is the lack of communications between the divers or between the divers and the crew on the boat. This can be overcome by full face masks with communication. Otherwise, the underwater scenes will need to be narrated. Wait...

If they did that it would cut the show time in half. They have to fill in the time and make it more exciting. Yeah, car chases are exciting to a point and their demise on crime shows might be a reflection of the fact that the police, in real life, have backed off from these chases because of the...

If police were as dumb as they are portrayed on some TV shows (criminal minds come to mind) there wouldn't be any cops alive. The face off you describe between the cops and the perp is better known as the Mexican stand off with or without a hostage. In real life the cop(s) will be shot...

Being able to really enjoy diving, for me, was the ability to relax and go slow. You say it takes a lot of trial and error. For me, it took a lot of diving and I think you'll find with experience you will relax and become more comfortable in the water. This will lead to safer and more enjoyable...

......that the diving here is egg-celent! :)

Your definition for "balanced rig" is different than how most users define it on SB. As I have described it above I don't use "lots of weight" to get down but just enough to allow me to descend when I exhale, and that allows me to swim up to the surface. To be horizontal the term I would use is...

Yes. That seems inexpensive but you have to paddle them yourself! :cool:

It's too bad things didn't work out with your old computer. You made a great choice going with the Perdix. I dive with a Perdix and it is "overkill" for the diving I'm doing now which is air and nitrox recreational diving. At one time I was considering technical diving so I would have needed the...

I have a balanced rig and have successfully swam it up (in fresh water) from 100 ft. to the surface with the wing completely empty. However, I'm slightly negative so I need to fin slightly to stay afloat. I imagine if you're with a buddy, and you stay together, your buddy can add more gas to...

I had two kids that not only had different personalities but different interests. One of the kids was extroverted and loved to be with his friends outside doing various activities that were more consistent with an older generation. When he was young and we needed to punish him he had to stay...