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Post by scubakobe on May 26, 2006 22:30:08 GMT -5
Learned about that in scuba diving lessons. I felt something similar to that before, I wasn't able to equalise my ears and I kept going deeper..., you can figure out the rest . If you have a cold, it will block your sinuses and you won't be able to equalise your ears, so you get that pressure feeling when you go deep like in a pool. If you come up too fast, from 30 feet, and even 20 sometimes, you can get decompression sickness (The famous bends!) and/or your ear drums may pop! That is true for going deeper of course. Diving is opposite of flying I guess, because when flying, the higher you go the more oxygen you need, and when diving, the deeper you go the less PURE oxygen you would want because it becomes poisonous. Aviation is much funner than diving though, I have to admit! ;D
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Post by jimslost on May 26, 2006 23:39:40 GMT -5
The military and airlines have regulations about how much time must pass between your last dive and your next flight so that the bends won't (shouldn't) become a factor. No doubt the FAA has similar guidance, but since I don't dive, I've never paid attention to it. In my youth, I flew with a head cold and ended up with a sinus block. It literally felt as though someone was hitting me in the face twice a second, 24 hours a day for 16 days. Ear blocks are not much better. I no longer fly with anything remotely resembling a cold.
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Post by scubakobe on May 27, 2006 0:02:11 GMT -5
Oh, yup heard of those regulations too. I doubt I could afford to scuba dive and fly in the same day LOL ;D. So that shouldn't be a problem! Never felt that pounding feeling on my head before, as you described, but I bet my time will come.
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Post by jimslost on May 27, 2006 0:31:07 GMT -5
Let us hope not!
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Post by Keith on May 27, 2006 7:42:21 GMT -5
Hey... did you know that if you dive in to fast on a cold day you will pop lake a water balloon? ;D I couldn't resist it... sorry Jim. I don't dive because I don't like the feeling I get with all that water pressure on me. The wet suit just adds to the feeling. Diving is just not for me. I did it a few times and hated it. 10 feet down with a snorkel I can handle though. I have been in a mini-sub though and that was fun. Fully contained with air and pressurization. We didn't go down far at all though but it was a blast.
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Post by jimslost on May 27, 2006 9:03:10 GMT -5
Come to think of it, a mini-sub would be a fantastic addon. Throw it in the back of your C-130 and explore the world, top to bottom!
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Post by Keith on May 27, 2006 10:52:27 GMT -5
Top to bottom is right. This is from the NOAA Ocean Explorer website... "the deepest-known part of the ocean measures 10,924 meters (35,839 feet), in the Marianas Trench near Guam. If the world's highest mountain, Mount Everest (29,141 feet), were to be placed into this trench, it would be covered by over 1.25 miles of water." Somehow I don't think any mini-subs would be able to dive to 35,000' though. Stop me if I am wrong but does my "pop like a balloon" theory work at 35,000' below the surface? More like implode than pop huh?
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Post by Slide on May 27, 2006 14:06:14 GMT -5
Some Frenchman has been down there, I guess. Picard? He was also the guy in the stratosphere-balloon, back in the fifties. I think I remember the sub was called "Trieste" and it still holds the record.
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Post by jimslost on May 27, 2006 15:05:18 GMT -5
Crush like an egg, maybe. I was thinking more reefs than trenches ....
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Post by scubakobe on May 27, 2006 15:08:02 GMT -5
Hey... did you know that if you dive in to fast on a cold day you will pop lake a water balloon? ;D I couldn't resist it... sorry Jim. I don't dive because I don't like the feeling I get with all that water pressure on me. The wet suit just adds to the feeling. Diving is just not for me. I did it a few times and hated it. 10 feet down with a snorkel I can handle though. I have been in a mini-sub though and that was fun. Fully contained with air and pressurization. We didn't go down far at all though but it was a blast. Pressure down there? Naw. I feel free as a bird down there! The wetsuit does make it worse, I know how you feel there because there is no non-custom wetsuit that fits me. Either the legs are too small, or the legs are right by the neck area is too large. It gets pretty freezing in So Cal waters, about 40-50 F (Yes thats summer too!) and the cold doesn't help matters!! Can't believe ya wouldn't like diving, but hey, there are things that aren't just meant for you.
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Post by Keith on May 27, 2006 18:30:51 GMT -5
Pressure down there? Naw. I feel free as a bird down there! But not at 35,000' below the surface you wouldn't.
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Post by scubakobe on May 27, 2006 18:59:09 GMT -5
Oh! I think I missed something LOL ;D Oops.
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Post by Keith on May 28, 2006 10:59:28 GMT -5
What amazes me is that if we dive down just few hundred feet we stand the chance of serious injury or even depth. The record (as far as I know) is by Mark Ellyatt, a British technical diving instructor, who set the world record for the deepest scuba dive off the island of Phuket in Thailand when he dived to 1,027 ft. BUT, imagine 35,000 ft. Yet there are fish and other marine life that live down there in those extremes. It's just amazing to me, that's all.
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Post by scubakobe on May 28, 2006 17:33:55 GMT -5
Well, I guess if you were born in space and you studied Earth, you would be amazed how we humans survive in the atmosphere pressures. So the fish are probably amazed we don't blow up on the surface! ;D We are an astronaut on the moon with no suit, according to the fishes. (Wow I put -es at the end, got me there)
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