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Actually guys and gals, I'm not kidding. When learning new skills, especially those that require intense concentration and involve increased anxiety, it's best to begin the learning process in a comfortable environment. Once the fundamentals can be mastered, then it makes sense to begin...

If you both got out of this scenario alive, count your blessings and don't be picky about the number of minutes it took to surface. The primary issue here is that a pair of buddy's lost eye contact with each other, Full Stop. Both of you made mistakes. You may wish to put more detail into...

Why freeze your butt off when you can dive in bathtub water with 100ft of vis... Eh?

Kev, my post includes the note "recreationally trained" diver and based on your response, you seem to have missed that. If the diver is recreationally trained, they won't have the knowledge and experience to self diagnose and differentiate between DCS I and II. They may even have trouble...

Given your comments, I don't think you understood Nick's presentation. I've studied this topic for a while now and it's fairly misunderstood. In theory, IWR is just as effective as Chambered recompression from a pure micro-bubble offgassing perspective. However, there is one fundamental...

I think there have been lots of info on doubles options and tank sizes, so I won't go into any detail there. If you have a low SAC, and your buddy also has an equally low SAC, then it's possible for the two of you to use physically smaller tanks with less overall volume... but it may not be...

I started with my single tank setup... BP/W. The instructor allowed me to rent a set of double tanks with manifold, and a redundant doubles wing. 1 or 2 side slung tanks were also required during training, again rental. In the end I purchased a reel and SMB. These are usable no matter what...

Disorientation and vertigo happen in both day and night diving. An SMB is a good way to get your bearings, but if unplanned it might indicate an emergency to the surface crew. Using a rope to descend, and staying near the bottom or a wall while using a bright beam is helpful. If there is a...

If you use a Max PP02 of 1.2, On 32%, the MOD is 90 feet. At 100ft = 30m = 4.0 ATA, the max % of 02 is 30%. For 82 ft = 25m = 3.5 ATA, the Max % of 02 is 34%. (again, based on MOD @ PPO2 of 1.2) I hope this helps you to figure out your recreational depth floors. You should be able to do...

Know-one, be nice. Please, If you have specific corrections you would like to apply that everyone can benefit from, offer them in a positive manner (helpful) rather than an accusatory tone. The generality of your note is hardly helpful.

Baume and Mercier Capeland XXL 45mm Titanium Diver's watch with expandable rubber strap, good to 2,000 m. Incredibly easy to read under water. Panerai Luminor Marina, classic PAM048,,, with Kevlar Strap. The dial is so incredibly easy to read.

For cold water, I'd suggest an environmentally sealed first stage. Make sure it has adequate surface area in contact with water to dissipate heat. Apex Regs have a long history of being good in cold water. ScubaPro MK17 is good (I have personal experience with this at 34 degrees). Poseidon...

The Max PPO2 values have gradually decreased since the Navy Diving tables came out over 40 years ago. I've seen literature with 2.0, then years later with 1.8, 1.6 etc... now it's 1.2 (good reason). If diving on Air, you reach PP02 of 1.2 ATA at 47 meters = 155 ft, beyond recreational limits...

Advanced Nitrox and Deco Procedures are two courses provided by IANTD. TDI also has courses of similar names, but with different criteria. If you have an interest in learning to dive longer periods under water, it's recommended you do a course with doubles, and Nitrox above EAN 36. I found...

You have two options... Helo or Diver first. I'd suggest going Navy as both options exist there. US Coast Guard rescue diver, and/or rescue helo pilot, is also a good option.

The preliminary testing has been good on the algorithm on it's own, but implementing it in the existing software is complex. It's a complete re-write of some of the fundamental math for figuring out the amount of nitrogen used in calculations. A 4th button, and a differe nt screen technology...

DiveNav... how many different variations would PADI have to write if they did it for specific computers? PADI is being practical by writing from a gneric point of view. Plus... no matter how different the buttons and screens are... all computers do the same thing for OW students... meausre...

Also.. the QD with i3 is a bi of a Fad... better to go with something a bit more standard... you're paying a lot for somethin that isn't any easier or better to use than a standard inflator system.

Get through 100 dives and your Rescue+EFR... assist with classes to find out if you actually want to teach. The DM and OWSI certiications are designedfor people who want to teach. If you simply want to increase your knowledge, there are other courses you can consider... Adv Nitrox and Deco...

There are many ways to get into diving; DSD's are one of them. They are safe and fun for 99% of the people who engage. If the instructor is good and patient, they give you the time you need to learn basic bouyancy and get comfortable with basic equipment, breathing under water, clearing your...