Divers are the least problem of the oceans. I can't even call us a problem, our "contribution" is so insignificant that it's practically zero. A few broken corals by students, that's maybe the worst. Divers don't discard millions of tons of rubbish and poisons into the ocean. The problem is our...
I don't think adding anything in the sea water is a good idea but in such a low concentration (homeopathic I'd say) probably it has no effect on the coral. I've heard of people using dishwashing liquid on themselves so they can slide into the wetsuits easier...
How fit are you? Do you overexert on those dives? The panicky feeling comes from too much CO2 in the blood. Either do some cardio or go very slow on the dives and see if there's difference.
It depends, people are different. I've seen some do 10 pool sessions and then in the sea look like complete idiots. Recently I did a DSD with a swimming coach - perfect discipline, did everything exactly as instructed and swam like an experienced diver. Had two other guys who did maybe... 20...
RainPilot, thanks much.
One thing not clear to me, though. How do they maintain the horizontal trim with a backmount? It's no problem with a weight in hands stretched forward but not so much with a weight belt or even with weight in the trim pockets...
Weight distribution. Typically with backmount the chest is positive, the lower body negative and when you stop, the body assumes a vertical position. If you put weights higher on the body, it will be easier (if not effortless) to stay horizontal. This is how sidemount divers do it.
On my first dive ever I had to put on a 7mm wetsuit in 35C heat and 90% humidity. After that in the water I was short of breath and close to panic. It didn't happen fortunately. After that I learnt how to save energy in the preparation. So don't be disappointed, just go slowly, or improve...
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