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Rethinking the Wetsuit
symbolset writes "Apparently Australians have come up with the brilliant idea: if you don't want to be eaten by a shark, it's best to not go swimming in shark-infested waters in a seal costume. 'Scientists from the University of Western Australia, with designers Shark Attack Mitigation Systems (SAMS), have unveiled two new wetsuits that they say could save lives in the water. Based on a breakthrough discovery that sharks are colour-blind, one wetsuit, labelled the "Elude," is designed to camouflage a swimmer or diver in the sea. At the other extreme, the "Diverter" sports bold white and dark-blue stripes, and is intended to mirror nature's warning signs to ward off any potential shark attack.'"
it looks just like the ship camo the Navy used in WW2, but since it's applied to sharks instead of the Japanese, we deserve a patent!
Not in Florida.
Yeah, they do. How many zebras are eaten by sharks every year, huh?
-=This sig has nothing to do with my comment. Move along now=-
I don't always dive. But when I do, I eat the sharks.
I can point to another advantage of the striped suit.
As a recreational diver, one occasionally drops a piece of equipment in the water. Bold, striped colors would make it much easier to find something (a fin, say) laying on the bottom.
And to respond to a previous poster, they covered pots of chum (chopped fish) in the proposed experimental suit to see how sharks would react. The video clearly shows sharks attacking a square-dotted suit while veering away from the striped suit.
Seems like an innovation discovered by research and experimental method. I have no problem with them having a patent on this.
Actually patterns on wet suits to look unappetizing to sharks was done around 20 or 30 years ago. It was also done for surf boards as well.
They may not have been these exact designs, but the idea itself isn't new at all.
Most predators use a chomp and shake technique, while avoiding puncture wounds is a good thing, having a 14 foot shark shake you like a rag toy is going to spoil your day
Apocalypse Cancelled, Sorry, No Ticket Refunds
Suburban human teenagers have been known to imitate the aggressive display and dress of alpha male gangsters from the city. This is done chiefly to avoid predation or being asked to take out the trash.
A surfer paddling on the surface is back lit by the sun. A shadow against the sun is going to appear black no matter what color the suit.
This isn't a problem for scuba diving. However, shark attacks on scuba divers are quite rare even without special wet suits. Sharks' MO is to watch for seals near the surface and lunge upward to catch them. Scuba divers don't linger on the surface and under water they don't look anything like seals.
Hey Chuck Norris!
I never knew that you post under AC here. I always assumed that your username would be root and your UID was -1.
rm -rf --no-preserve-root /
Sharks actually hunt with all their senses:
Hearing: up to several kilometres.
Smell: 100+ metres
Pressure: Up to 100 metres
Sight: Up to 100 metres
Electric: Up to 50 centimetres.
Taste, touch: Direct contact
But yeah, sharks cover their eyes with the nictitating membrane (or roll their eyes back if they lack a nictitatinig membrane, like the Great White) when they actually bite, so they don't rely on their eyes for the final attack; but before that final attack they do rely on their eyes (as well as their other senses).
"Total destruction the only solution" - Bob Marley
Especially if you give it a massive tooth ache in the process. Then it just might get really annoyed at you.
Sharks are too hardcore to even notice a minor problem like that.
When you are a shark, teeth are basically belt-fed consumables. Lose one? Multiple rows of failover teeth just waiting to replace it.
This is a conditional probability - you need to account for the degree of exposure to see how that overall fatality rate relates to a specific individual. Since shark attacks are exceedingly rare on land, the overall fatality rate is skewed down by the overwhelming number of hours spent on land (which contributes 0 probability of shark attack). This is different from things like mosquitos, where (nearly) everyone is at risk of a mosquito bite all the time. The overall probability of being killed by a shark is
.999*(low risk) + .001*(very high risk) = average low risk. But since their overall fatality rate is slightly below construction workers, that means that 0.1% of the time they're facing a risk of death hundreds of times higher than what construction workers face. That's what they're complaining about.
p = [ (hours on land)*(zero) + (hours on water)*(chance of fatal shark attack) ] / (hours total)
So say the entire population (including everyone who's landlocked) goes to the beach an average of 2 times a year and spends a total of 30 minutes in the water, and suffers 1 shark fatality per year. But the average surfer goes to the beach 3 times a week and spends 2 hours in the water each time. Then the average fatality rate for surfers is equivalent to 312 fatalities per year for the entire population. In other words, if the entire population spent as much time in the water as surfers do, you'd expect to see 312 shark fatalities per year. (The actual rate is lower since a disproportionate number of hours in the water is contributed by these surfers vs. casual beachgoing swimmers.)
Same thing happens for police officers, who are frequently criticized for complaining about the dangerous situations they encounter when their overall fatality rate is lower than for construction workers. But construction workers are exposed to their danger 40 hours a week. As best as I could determine, police officers spend only 10% of their time on patrol, and probably only 1% of that time is in what would be considered a dangerous situation (chasing and apprehending a resisting suspect). So whereas construction workers are exposed to a constant level of moderate risk, police officers face a low risk 99.9% of the time, then an incredibly high risk the other 0.1% of the time.
Whoever came up with this doesn't know much about sharks.
Most sharks and other carnivorous fish hunt from below, looking upward for their prey's silhouette against the bright and shiny sea surface. Doesn't matter what color your wetsuit is, it's not going to break up your silhouette.
In fact, the reason prey fish have silvery sides and bellies is to blend in with the shiny sea surface. You could try a reflective websuit, I suppose, but then you'd look even more like a fish.
[Scene: Interior. A New York apartment. There is a knock at the door.]
Woman: [speaking through closed door] Yes?
Voice: (mumbling) Mrs. Arlsburgerhhh?
Woman: Who?
Voice: (mumbling) Mrs. Johannesburrrr?
Woman: Who is it?
Voice: [pause] Flowers.
Woman: Flowers for whom?
Voice: [long pause] Plumber, ma'am.
Woman: I don't need a plumber. You're that clever shark, aren't you?
Voice: [pause] Candygram.
Woman: Candygram, my foot! You get out of here before I call the police! You're the shark, and you know it!
Voice: Wait. I-I'm only a dolphin, ma'am.
Woman: A dolphin? Well... Okay. [opens door]
[Huge latex and foam-rubber shark head lunges through open door, chomps down on woman's head, and drags her out of the apartment, as Jaws attack music plays.]
Source: wikipedia