281–290 of 302 posts
Wikipedia: https://en.wikipedia.org/wiki/Blue_Hole_(Red_Sea) Map: https://www.google.com.au/maps/place/Blue+Hole/@28.5722712,3...
Here's some good diagrams that show the shape of the hole: https://web.archive.org/web/20080321024116/http://www.blueho...
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Tangential, but driving never quite feels safe if you are pushing the car. At least not without inspecting the entire suspension every month or two. And that's ignoring anything internal, like your clutch fork giving out, or bending a rod, or your inner tie-rods disconnecting, or your brake cable tearing, or...
If you are pushing the car on a public road it means you have already failed at driving safely. Driving safely != not cause an accident Driving safely == not be in an accident You can be the best driver in the world driving the best car in the world and it doesn't matter, because some idiot will not look in their mirror when changing lanes and suddenly you are in an accident. To drive safely on a public road means to…
I'm an experienced diver (PADI dive-master, ACUC instructor, IANTD gas-blender and normoxic trimix diver, TDI hypoxic trimix diver and dive-master) with several thousands of dives of which many at 100m+ (330 feet) depths. I lived in Dahab where for 16 months I assisted training technical diving instructors in the blue hole and at other less touristy dive sites around there. The blue hole is in not a particularly dang…
The written test for open-water felt inadequate to me; I expect most reasonably smart people could pass it without any study, what with only needing 75% on multiple choice.
I'm an avid diver; got certified as soon as I turned 12 years old and have had some great adventures and life lessons diving and continuing my training and education. After many many conversations and encounters on dive boats with others (some seasoned, most tourist / rec divers) - I believe that 90% of the industry sees diving akin to a roller coaster ride instead of Skydiving. The risks with scuba are there for you…
Which is to say diving is a sport that can be safe, but only assuming you are actively and honestly engaged in making it safe. I am not diving but I am sailing and for the most part sailing is a safe sport assuming you are prepped including mental preparation. If you are not, things can get downhill pretty fast. I consider diving one of the sports where you place yourself in a situation where you are dead by default…
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Question: Why are divers injecting this trimix?
I don't recommend anyone "inject" trimix ;) But jokes aside : Trimix is an (artificial) gas blend that includes helium, which is an inert gas that your body doesn't metabolize (though their is still a lot of unanswered questions about its effects below 250 meters). Your body metabolizes gases (normally only Oxygen) according to their partial pressures in your body. The partial pressure of Oxygen at sea level is just…
Your body can function pretty well at PPO2 levels less than 0.17 bar. People go to an altitude of 10000 ft / 3000 m all the time where PPO2 is only 0.14 bar.
I've dived the Sinai's Blue Hole, so it's wild to see this on HN. It was an intense experience. Our dive instructors warned us of how deadly the site was, and the various hazards. But the dive itself was unique compared to other deep dives I've done. I would describe it like parachuting, slow motion, into the bluest blue. By the second, the sunlight got dimmer and the blue got bluer. It was disorienting if you looked…
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I've done a few hundred dives (so, intermediate? with some additional certifications for deep/nitrox/rescue/divemaster) and the biggest problems I've had were 1) dropping a steel cylinder on my toe on a boat 2) getting sunburned on my scalp before I started wearing a hood even in warm water, due to an extended surface interval 3) dodgy food on a liveaboard. I don't think most recreational divers push things close to…
Most definitely misremembering the depths! 300' begins to collapse lung & heart cavities ;)
(Lungs do compress during breath hold freediving.)
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Tangential, but driving never quite feels safe if you are pushing the car. At least not without inspecting the entire suspension every month or two. And that's ignoring anything internal, like your clutch fork giving out, or bending a rod, or your inner tie-rods disconnecting, or your brake cable tearing, or...
If you are pushing the car on a public road it means you have already failed at driving safely. Driving safely != not cause an accident Driving safely == not be in an accident You can be the best driver in the world driving the best car in the world and it doesn't matter, because some idiot will not look in their mirror when changing lanes and suddenly you are in an accident. To drive safely on a public road means to…
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The median age of riders is ~50 while the average age of fatalities is 42. People over 50 make up significantly less than half of fatalities. However, you are still kind of correct- the number of fatalities picks up strongly at 50+. People 35-45 tend to be the safest. People 50+ are still on average significantly safer than Motorcycle fatalities are heavily associated with risk-taking more than anything else. There a…
> The median age of riders is ~50 while the average age of fatalities is 42. People over 50 make up significantly less than half of fatalities. I'm not sure if you were trying to imply there was some connection between those sentences? You could easily have more than 50% of fatalities over 50, and still get an average of 42 (for example, deaths clustered mostly in either twenties or fifties).
Which I think is the point. Very young riders are in fact crashing a lot - something parent claimed is a myth.
That means the blue hole can go screw itself. I'll stick to a maximum depth of 25 meters or so and my goal is to see shipwrecks (from a distance) and pretty fishies.
As for skydiving, I want a good view, no wind, a maximum of one tiny cloud, and a dropzone with good packers and craft beer.
There are plenty of people out there BASE jumping or deep-sea diving. There are plenty of them recording their own deaths. I plan to not be part of those people.