quote:
Originally posted by nebbianquote:
Originally posted by Dawn Patrol
What happens to the fish? Aree they eaten, or sold etc. Holy Sh!t. 20m!!! Thats a looooooooooonnnnnggggggggggg way down. Can you get "the bends" from that depth?
One shot, one kill, one meal... I can't stand wasting fish
You can't get the bends because you only have the air that's in your lungs, but the danger is shallow water blackout. I can't remember the specifics, and I never pushed myself hard enough to get close to the danger zone, but I think it's something to do with dissolved CO2 in your bloodstream making you black out as you get close to the surface after a deep dive. Humans have a reflex so that if you black out, you'll automatically take a breath unless there is water on your lips. With a snorkel in your mouth that failsafe doesn't kick in so you inhale a big lungful of seawater while unconscious. Not good.
Stay within your limits though and you'll have amazing adventures, see things that 95% of the population never dreamed existed, and have the primal satisfaction of hunting your next meal. Can't be beaten
quote:
Originally posted by Dooverlacker
It is possible to get bent from free divng if u do alot of deep decent's one after another because altho most co2 is released from the body after coming to the surface there is residual co2 still in the blood and each dive if done quickly enough after the other can lead to a sufficient build up to cause a bend this is very rare though. Also there is at least one condition known as a PFO (patent foramen ovali) which it is susspected at least 10 to 30% of the poppulation have which increases the likelyhood of getting bent from diving and free diving. Look it up if your intersted my fingers hurt from typing
quote:
Originally posted by FilthyAmatuerquote:
Originally posted by Dooverlacker
It is possible to get bent from free divng if u do alot of deep decent's one after another because altho most co2 is released from the body after coming to the surface there is residual co2 still in the blood and each dive if done quickly enough after the other can lead to a sufficient build up to cause a bend this is very rare though. Also there is at least one condition known as a PFO (patent foramen ovali) which it is susspected at least 10 to 30% of the poppulation have which increases the likelyhood of getting bent from diving and free diving. Look it up if your intersted my fingers hurt from typing
The bends or DCS (Decompression Sickness) associated with SCUBA diving is caused by excessive nitrogen dissolving in the blood at high pressure. The nitrogen then forms bubbles in the blood when u ascend too quickly, these bubbles get trapped in joints which cause them to seize up and become bent.
As far as CO2 is concerned, it is far more soluable in the blood than nitrogen and far less likely to form as a gas in the blood, it also triggers the need to breath so in order for it to get in a high enough concentration to bubble out one would have to be very good at ignoring the need to breath. I am pretty sure CO2 does not give people DCS. As far as Nitrogen DCS is concerned, it is possible but unlikely that a normal freediver will get it. If you do a SCUBA dive then do deep freediving it is more likely, because of the Nitrogen dissolved in the blood from the SCUBA dive, also if you do lots of deep dives over a long period of time with short recovery periods (time on surface) you can get bends like systems (according to the internet). But most recreational divers will never push their bodies to this extend.
Worry about Shallow Water Blackout
. Look up the PFO thing too it's quite scary if your a diver as this condition is rarely picked up during a diving physical.quote:
Originally posted by FilthyAmatuer
Dooverlacker, i had a feeling that you might have gotten them mixed up, sorry if i rubbed anyone the wrong way. Where abouts do ya dive?
JP747, Are you sure about using compressed CO2 instead of nitrogen? Could u please elaborate on this a bit, because I thought CO2 is toxic above 5%, that would mean u would need 95% oxygen which would also be toxic at that depth. Or is the helium or something else in the cannisters? Forgive me if I am wrong.
Also congrats on your Personal Bests, they seem like awesome times to me, I am not real good at it, but have done a lot of reading, I think my pb static is about 3min, and diving while spearing in the ocean is a bit over a minute, diving without a gun I get a bit longer.
also there was a few spelling/gramatical errors in my last few posts, sorry about that
. Embarassingly enough i am the guy who monitor's the divers gas mixes. If anyone here is a sat diver be afraid be very afraid LOL. I do do some recriational diving when i get the chance most of it around rottnest island perth but iv dived alot of places in W.A and around the world. BTW your correct about those numbers i would susspect a nitrox mix was used or heliox where helium is used in the place of the nitrogen and small amounts of other gasses. Most mixes with oxygen over 21% are used for theraputic reasons.
quote:
Originally posted by jp747
haden or filty amateur, sorry correct me if am wrong i failed chemistry in highschool and college so compressed air would be? help anyone? if am right co2 is carbon dioxide and co is carbon monoxide?
