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Honestly, it sounds like a solution in search of a problem. If I really wanted a buoy or float to follow me around, I would probably *prefer* a simple solution (like a reel and line) to this type of gizmo - even without considering the cost. What is the perceived need to explain this kind of...

Gordon, I hate to be the one to break it to you, but I asked around ... that wasn't a dream.

Actually, I was remembering a story from WWII of a couple of servicemen in the South Pacific who were killing sharks by throwing dynamite into the water wrapped in some old spoiled beef or something like that (I can't remember all the particulars). They were in a small boat of some kind, and...

First, be clear about the distinction between buoyancy and trim (and posture) in the water. Neutral buoyancy is one distinct goal; balance and good trim are other, related, goals. But if you are neutrally buoyant, you wouldn't want to fix a problem of balance by adding or removing weight. So...

Sure, that's why I have always preferred to use explosives in my own close encounters with the bitey monsters of the briny deep. I also tried carrying a Saturday Night Special in a little zip-loc bag for a while, but it didn't never scared away nasty critters underwater, because they didn't...

As a general proposition (i.e., I don't think this is a shark thing especially), you will see a lot of unnatural behavior from predators in captivity. From a little bit of animal caretaker experience a long time ago, I think wild animals in confined spaces can be much more aggressive toward...

Dive Solutions is a PADI shop in London, and its site recommends taking 1-2 weeks free before the course starts to read the manual and complete knowledge review. Dive Solutions and several other options are listed here...

The real advantage of a serrated blade is that the serrations cause the angle of attack from the cutting edge to the thing that is being cut to change very quickly as the blade moves, and the cutting force is applied to a much smaller surface area (as compared to a long straight blade). When it...

This may be what you are looking for. Check out the gallery at http://www.sharkdivingunlimited.com/ Ralf Kiefner's photographs show Michael Rutzen diving with and touching a great white shark in the way you described. The photograph at the bottom of Ralf's gallery includes what looks like...

Do you mean with one hand he showed a flat palm ("stop") and with the other he signaled thumb's up?

Still no response? I'm starting to wonder if he hasn't had another one of those 3 out of 100 times type of experiences ...

Those are the gloves I have. They're actually reasonably tough for such a lightweight glove - because they are made for paddling a kayak for long stretches, after all - but they will not stand up to abrasion. They are very good for holding on to the stuff that you carry with you, and for...

I have been vaccinated against all kinds of things over the years for travel in Latin America, but what is recommended and what is required varies a lot from place to place, and often depends upon what you will be doing, how long you will be staying, where exactly you will be going - traveling...

Mine was NAUI, and I think Detonate has it exactly right. The assisting diver should inflate their own BC, and the OOA diver should orally inflate his own BC. There is no reason to assume that the OOA diver is giong to be paniced at the surface. If the OOA diver is still in a panic when...

Local diving around Phoenix will definitely get you practicing navigational skills! First, there's the whole "where's the water?" thing. And then, once you find one of the lakes and submerge, you're going to want a compass and a slate so you can track your progress under water and note the...

The Phoenix main library has a video on Underwater Navigation (in the Video section on the ground floor, call number 797.23 Un2). At 30 minutes, it will provide a fairly light treatment of some basic navigation skills. There are also a number of books available on underwater navigation skills...

I don't know what the problem is, but those are very basic skills - and how could a person get through a class without having been required *several times* to drain the water out of their BC before putting it up? How could they have practiced OOA skills without the OOA diver being required to...

I second the suggestion to take the OW course again, rather than a refresher. I wouldn't worry about or bother with a computer right away, but take some time to shop around for your personal gear, and ask questions. It is a wonder to me that so many people buy their mask, fins, snorkel, and...

I also have a Wenoka "Blackie Collins" squeeze lock knife in 304 stainless and a blunt tip. It's a very well designed little knife (the serrated edge is shaped on only one side of the blade, which makes it easier to sharpen); the line cutting notch could be better located a little farther from...

NAUI requires two dives: "SKILL REQUIREMENTS At least two dives are to made using EANx, one of which is to be a repetitive dive. The student is to analyze his or her own breathing mixture and to plan and safely execute each dive."