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For OW certification, aren't the materials going to be the same for all NAUI instructors, and the same for all PADI instructors, and so on? I have copies of the NAUI materials, and an old copy of the PADI book somewhere, and I think they are both perfectly appropriate for the courses for which...

I think that's excellent advice. If you can find a place where you can talk to other divers in your area - maybe here, but maybe there are other options in your community - ask around. One reason for preferring one place to another is that they sponsor such gatherings, which may be where you...

I have a pair of the Atomic Liquid Blue split fins, and I find they are *very* efficient for flutter and variations of flutter kicks, across a broad range of motion (big sweeping kicks to little toe kicks) and some others (e.g., dolphin). They are not optimally designed for many other finning...

These are common problems. One of my partners has been diving regularly for about 20 years and still doesn't own a computer. There are some good reasons for using a computer for recreational diving, but you can get along perfectly well without one, and using the tables can keep you from...

You can't just follow a divemaster and assume that tracking his or her dive profile will keep you out of trouble. First, because it just isn't true - some divemasters will steer you wrong, and ultimately you are responsible for your own safety. What does that divemaster know about the dive(s)...

Yeah, I just started this last year with these throwaway contacts (wear them once and toss them), with the left eye adjusted for near vision - more or less - and the right for mid to long range vision. It actually works pretty well for most things, but the left eye correction is not where it...

I don't think you can make any assumptions about how (or even whether) the time required to equalize your ears will increase with greater depth, unless you know why you're having the problem you are in the pool. There are some people who cannot equalize their ears. I would second the...

I just don't like those consoles, and would prefer to have everything on the wrist, except that I'm not inclined to pay for a wrist-mount air integrated computer (and don't think AI really adds value for me even if it were much cheaper). The SPG clipped to the waist is much less in the way and...

People who get close enough to touch with their (gloved) hands will do even more damage with their fins than people who maintain a little distance. I don't like to see people hovering inches away from the reef for a lot of reasons, apart from touching and stirring up silt and sand with their...

Yes, there really is a Mexican Navy, and when cruising sailors from the U.S. sometimes get themselves into terrible fixes in Mexican waters, the Mexican Navy will often bust its *** to help them out.

I'm not qualified to give any kind of medical advice, but isn't the stationary bike going to keep aggravating the tendonitis if you don't lay off until it heals? I suffered a very bad knee injury a long time ago, and have had trouble with it from time to time, so I sometimes wear one of...

San Carlos, Mexico - in the Sea of Cortez - like just about every other diver in southern Arizona at the time. (I was a student at the UofA when I got certified.)

I also wouldn't be inclined to draw any conclusions about a diver from their choice of BC types. There are a lot of reasons for going with one choice instead of another, many (or perhaps most) of them having nothing to do with the diver's abilities. There are a lot of excellent divers out...

I think the way NAUI generally describes them, the Master Diver certification is concerned with improving your personal diving skills, while Dive Master is a part of the "leadership" track which, as with any kind of leadership position, involves responsibility for others. Putting aside whether...

If I'm understanding that part of your question correctly, you should do it all at once. Don't bother to put on some of your stuff and add weight, and then add other stuff and add more weight (or have to remove weight), and then more stuff and more or less weight, etc. There's no reason to go...

I'm all for such restrictions on gloves and knives around reefs, and the suncream restriction makes sense, too, especially if you have the perspective of a person who is on the site year round and sees how much it all adds up. I won't go into the water without some cutting implement, so I have...

Work of breathing.

For ages I had a Seiko dive watch that worked beautifully and cost about $120 or so back in the early 70s. Last year it stopped keeping time accurately, and when I sent it in for cleaning and repair I was told that it could be repaired but not made waterproof again (change in design, the right...

I don't know, but I can think of a couple of points that would affect the end result. First, man-made structures like artificial reefs should create opportunities for new growth, habitat, etc., which (we hope and expect) will have a beneficial effect for the fish, etc. that thrive in those...

Well, the parts you can see do look pretty nice!