We got sharks in Cornwall, basking sharks that are toothless and feed on plankton. When they appear near beaches people actually jump in to swim with them
We got sharks in Cornwall, basking sharks that are toothless and feed on plankton. When they appear near beaches people actually jump in to swim with them
Urm, I do know how to dive hence I'm a little bit careful about cracking down to depth and only ever hit 45 meters on compressed air once in all my years of diving.
After 30 Meters Nitrogen narcosis can set in and it affects people in different ways, after 40 meters one is looking at oxygen toxicity which can be very serious and to dive to 60 meters without using mixed gas is just plain stupid and dangerous.
Regards your figures up top and total dive time. To hit 64.8 metres and then claim to have an average depth of 20 metres for a total of 48 minutes just don't work out.
Do a bounce dive to 64 meters and then straight up above 10 meters for a total dive time of 48 minutes would work.
This time of year they seem to hang about in groups, and their dorsal fins can initially cause a bit of a scare. There are some sharks with teeth in Cornwall but it's very rare and their size doesn't exactly get the pulses racing.
Dolphins are usually fun as well down here, they came inshore and got playful with some surfers last year near Newquay and Portreath.
Of course seals are abundant, they play on their 'cuteness' to get you to feed them fish or hang around fishing boats whilst they tread water looking up at you with their cute faces and whiskers
“You can lead a horticulture but you can’t make her think.” Dorothy Parker
I had a big old Barracuda bump into me in the Similan Islands. Rolled over to see a hoard of Jap tourists taking pics. I'm pretty sure he was the same fish I saw the previous year. The only sharks you see are the bottom feeding leopard shark.
what happened to this shark?
I often wondered how PETA (an extremist animal-rights group), who having a (stupid) saying of "A dog is a dog, is a cat is a cat, is a boy...etc", or something to that effect in order to state that all animals have the same rights as people, and that killing a dog is no different than killing a boy; so if that is true, then should (in this case) the big shark be arrested and tried for murder?
According to PETA's stupid logic, the smaller shark was "murdered" by the larger shark. Just points out, the stupidity of their logic (although I am all for, hot looking women getting naked for animal rights!).
RickThai
Thanks for the advice. I will certainly try to be more careful in future.Originally Posted by RickThai
How do seals tread water?
There are lots in Hua Hin mainly in time share business
Interesting shark piece in tday's Indie
http://http://www.independent.co.uk/news/world/americas/have-researchers-bitten-off-more-than-they-can-chew-in-trying-to-uncover-the-secrets-of-the-great-white-shark-8782588.html
Last edited by david44; 24-08-2013 at 12:23 PM. Reason: uselessness
That's what is so great about this planet, no matter how much people have learned about the animal kingdom, we are always learning new things.
I have always thought it cool, how flies are so quick to hide, when you bring out a flyswatter. It shares, with many animals (I think) the instinct to know when you are a threat and when you are not.
RickThai
Narcosis affects everyone differently. Some people are OK at 60M others get wobbly at 30M. I have a theory that regular stoners (of the herbal variety) are more accustomed to being off their heads and are more tolerant. Just a theory.
Short exposures to 1.6B partial pressure of O2 are OK - so 70M is the absolute limit. Tec divers regularly decompress with mixtures of 1.4B pp O2 - an equivalent air depth of 60M.
General fitness and hydration is a factor too. I ignored that at my peril - diving to 72M off Phuket (mixed gas) after a night of Soi Bangla hookers, ganja and an awful lot to drink.
Lesson learned - don't go diving when you are still half pissed, stoned and not slept for 24 hours. Despite a v "safe" dive profile (about 17 mins bottom time/ 140 min deco), I ended up in Patong chamber with a very expensive bill and residual tissue damage in an elbow joint that means sucking on O2 back on the boat these days for an hour or so after deco to make it go away after any deco diving .
As for average dept 20m for 40 mins: Assume 17l/ min at 3B = 2040 l. Assuming a 15L tank at 200B = 3000l. 2400 if 12 L tank. So he'd surface with circa 64 B or 30B
That said - If he's a heavy breather with a 12L tank he's a very silly boy
I think that's pretty much what they do; the dolphins' sonar knocks the senses out for many fish then the sharks find it easier to pick up the scraps...
BTW, to above - people can and do go down to whatever depths they like on air (some go to 100m...), but that doesn't say they will be coming back... Many divers who push the limits every dive, perhaps it becomes intoxicating, end up dead. You may have no sign of nitrogen narcosis or oxygen pressurization problems at one depth on one day under certain conditions, may be a very different story on another day... I never bounced down to any depths... I did TDI mixed gas and deep diving courses, but took care. Many divers are (w)reckless, imo...
Cycling should be banned!!!
Agree with BB.Originally Posted by Bettyboo
My downfall was the hooker that went gaga after a spliff (presumably having popped something a bit stronger earlier in the eevening), necessitating me sitting awake to babysit to ensure there wouldn't be a scene at the hotel or police and me getting the blame!
BTW There are some good wrecks off Phuket - we found a new one at 92 M after hunting around GPS locations where fisherman had lost nets a few years back - a 130m long E German freighter. Brought up some mail bags from the hold, they were all technical manuals, handwritten in Chinese in pencil - V STRANGE. The wreck is still giving off a very heavy gas. No idea what it is. It took a while to identify, but the Lloyds report states it was lost in heavy weather - seems a bloody big ship to go down like that.....
It starts getting v expensive to explore. Helium is a factor, cost of boat, support diver to lay stage tanks and standby etc.
No sharks either :-(
Interesting stuff L&F - rather you than me! A couple of years ago, very sadly, a diver from the Silpakorn underwater archaeology team died. I'm not sure of the circumstances, but it's always dangerous work and you need to take every precaution.
Lostandfound it was a good dive with plenty of deep diving experience plus medical support on the boat. All master divers or instructors. A mix of BSAC and a few other codes. Spare tanks were set up if needed at deco stops. At the time of that dive we were regularly diving 45 - 50 metres.
Never touched weed in my life so that rules that theory out. I know what you mean about guys getting narc'd at shallow depths. We had a pilot who got it bad at 30 metres.
I would mention, as BSAC was talked about briefly above, that diver skills are very diverse. Diving in Thailand, Malaysia or even most parts of the Red Sea, Australia, etc, is very different from the UK. I have done 99% of my diving in easy shallow areas such as Thailand or Egypt (both have sharks; Egypt has many many more...), and it's easy to become complacent. I did some night diving in a frozen lake in Birmingham, and some drift/wreck diving in Portland, and it's very much more challenging and complex - didn't see any sharks though...
I went to an island off Brisbane to do some diving (never did in the end), that had very poor visibility, ragged tooth sharks, tigers, the flat buggers on the bottom (wobbledongs or something???), close to a continental shelf drop-off, and by the traditional whaling stations and whale migration routes (lots of big sharks...). That's challenging diving! I was offered a job at a dive centre there, but I just didn't have the experience or skill development to do it... On my first day on the island, one diver had a heart attack and had to be airlifted to the mainland; the story goes, down to about 20m, half metre visibility, then came face to face with a 4m ragged tooth, out of the blue/dark... a common occurrence at that dive site, so if you like sharks!
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