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http://www.undercurrent.org/blog/2009/09/10/diving-shark-attack/ oceanic white tip fatal attack on diver (a very good diver). Don't think that large predators are like cuddly puppy dogs.

Compare your software plan to your tables to your computer. Make sure you are clear on all three before surfacing.

Yeah, there's no way that was survivable since they left their tanks on the U-269!

Threaded connections.... Wow! Are we in a cutting edge area here or what? Certification should definitely be mandatory. Simple study materials though..."lefty loosey, righty tightly....

The wrench in question has a black oxide finish. Like parkerizing, black oxide requires oil applied to the surface to prevent rust. If you think that means poor quality...you need to learn about finishes. A tool intended for scuba use would, however, be more useful in hard chrome...

Since water with chlorine in it is mostly...water....what is the science behind the pre-soak?

"Insidious failure modes" I like that LOL. I think I had a few race bikes like that. It couldn't have been me...

Steel tanks. Better yet Asahi steel tanks. Now you no longer need 6 to 12 pounds of your lead.

Swim downwards. If you have deco obligation....pray. Better yet, put weights and two buckles on a belt. Put the crotch strap over it. Now losing weights requires a knife.

Just had a great dive sharing air most of the way. We had fun, it was safe, it was my fault for believing the gal at the fill station. I would do it again.

Sidemount AL40 tanks.

You need to be prepared to meet unknown divers off another boat while underwater. So an important skill to master will be giving the "shark" sign with your right hand while frantically waving your left arm. On second thought, might be best to take rescue class first in case someone swallows...

I just had a dive where I shared air for 10 minutes. The buddy system worked great. Then she noticed and I got hit...

Maybe run a nut as well to put a little tension on the threads to prevent loose wobble?

It's just a threaded shaft. You could also use a bolt. It is not meant to be tight enough to strip threads. Were the hoses too tight?

If a deco dive with a separate deco mix you need enough gas to complete the dive with lost deco mix.

Don't forget the clogged dip tube scenario...

Would never have happened if political correctness hadn't forced EMU's change from the Hurons to the Eagles. They went from being warriors to being birds...

Pretend he called it a stage bottle. You will sleep better...

Dive Gear Express valves and manifold pieces are O2 clean. The latest ones have a hex dip tube.