Shark repellent

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A battery does not generate current until both poles come into contact via some connecting mechanism. Ergo, if a shark is after you, your best bet is to throw the battery at it and back off.
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Water can conduct current. So a battery submerged in the water can discharge. As noted, sharks can sense electrical discharges from other fish. This is because the water conducts that electricity from the fish to the shark.
 
I'm not sure on the legality of it, but I have dove in Florida's central coast waters with a 44mag boomstick.
 
From my experience you don't know what will cause a shark to attack and it may just be carrying a battery in a pocket.

When I was 18 I lost a $500 light while doing a night dive on Maui, shined my light on a reef shark, it came at me and broke the lens which caused the bulb to blow and shorted my batteries. Turns out it was cheaper to buy a new light than to replace the bulb, lens, batteries and wiring. After the dive my buddy (lucky enough to be an instructor in Hawaii) told me I shouldn't shine my light directly on a shark because it makes there senses go haywire. You don't gain that knowledge by diving in cold Montana lakes.
 
When I was sharking the bays, my two fav spots were around the J hook at Pass Cavallo and off Sand Point. Both places would yield a big black tip occasionally. I've caught 4 plus footers at the pass. They don't get much more'n 5 or 6 out in the gulf, but you're right AT the gulf, there. Don't get any of the big bulls or anything, or never have, but you never know around that pass. :D If I got one, I couldn't boat the thing, though. It'd sink the boat, LOL! They do get rather heavy over 500 lbs. And, well, landing one on 20 lb test on a med/heavy popping rod with a Ambassador 6000 would be a feat to be bragged about. Those big black tips are some fight on that rig, let me tell ya! The norm, though, are the little 2-3 footers.
 
Very strong magnets will turn their head.....try it...they flip out and leave. I live in FL and have a lot of surfer friends and they all make bracelets for their wrist's and ankles with the very strong rare earth magnets. It supposedly messes up their sensory pits.
 
Very strong magnets will turn their head
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What - you think you can see the shark coming? Ha ha ha.

They come shooting at you at 40 mph out of the murk, jaws open, you flailing around like a sushi treat. You'll never see 'em coming. You're just passing on surfer lore. If magnetic bracelets give them confidence, power to 'em.

When you're on a dive boat, it's usually customary for the dive master to ask the divers what they'd like to see. Invariably, everybody wants to see sharks. It's the most requested pelagic. So the DM does his or her best to find a shark or two but you usually get skunked. Sharks don't like people and they usually high-tail it when they hear bubbles and stuff.

Tiger sharks, bull sharks, some species will approach people, but they don't normally tear a chunk of you. But if they want to, ain't no Duracell gonna stop 'em. If you're really worried, then get a shark-stick, which is a shotgun cartridge mounted on the end of a pole, press-to-fire.
 
What - you think you can see the shark coming? Ha ha ha.

They come shooting at you at 40 mph out of the murk, jaws open, you flailing around like a sushi treat.
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Actually, there are lots of accounts where people saw the sharks approaching. The don't always attack out of the murk. In fact, many will engage in prey assessment behavior by circling their prey and/or by giving initial contact test bumps. When they do attempt to take prey, they don't usually attack with their mouths open. Instead, the mouth remains closed or open enough for respiration until the last moment when the shark opens up to bite. Also, the attacks are not always fast.

http://videos.orange.es/video/iLyROoaftIPk.html

Here is a very recent example of a girl who felt the shark bump her and saw the shark before being bitten. So it most definitely did not attack unseen out of the murk at 40 mph.
http://news.yahoo.com/video/world-15749633/girl-survives-shark-attack-17930936
 
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shockwave said:
What - you think you can see the shark coming? Ha ha ha.

They come shooting at you at 40 mph out of the murk, jaws open, you flailing around like a sushi treat. You'll never see 'em coming. You're just passing on surfer lore. If magnetic bracelets give them confidence, power to 'em.

When you're on a dive boat, it's usually customary for the dive master to ask the divers what they'd like to see. Invariably, everybody wants to see sharks. It's the most requested pelagic. So the DM does his or her best to find a shark or two but you usually get skunked. Sharks don't like people and they usually high-tail it when they hear bubbles and stuff.

Tiger sharks, bull sharks, some species will approach people, but they don't normally tear a chunk of you. But if they want to, ain't no Duracell gonna stop 'em. If you're really worried, then get a shark-stick, which is a shotgun cartridge mounted on the end of a pole, press-to-fire.
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I suppose that you saw that in a movie huh? Yep, must happen ALL the time if hollywood did it!

If you fish saltwater at all and you happen to catch a shark, put a magnet near its head and see what happens.........they will go beserk trying to get away from it.
 
I suppose that you saw that in a movie huh?
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Nope. Just an observation from dive trips around the world. I've been made quite nervous from bull sharks bumping me because, unlike most other species of sharks, they have no apparent fear of humans. White tips, black tips, most reef sharks are skittish. It's unusual for divers to be bitten outright, but those paddling on the surface, like surfers, may present a visual and sound picture similar to a seal, and a shark will surge upward fast to make the kill and that's how most surfers are injured. A battery in your pocket isn't going to stop that.
 
Dogs work well. I have one that is an excellent shark repelling dog. The whole time I have had him I have never seen one.
 
The only shark I ever saw while diving was up on the MA coast in the 50s. I don't think it was over 4 feet but it seemed to take 2 weeks to go by me.
 
I saw a tv show on discovery shark week shoot it must been like 7 or 8 years ago or so not totally sure but they where testing shark deterents. They found that plain dish soap was as effective as the commercial stuff.
 
REALLY? yall guys are putting your guns in salt water? and firing them underwater? to think i was always taught to keep my guns and ammo nice and dry.
 
Tango thanks for the information. Very informative. I'll remember that next time I hit the break.
 
I vaguely remember a show where they were testing AC current, at low voltages and how it affected sharks. They had the bottom of the pool lined with exposed wires and ran the current through the wires when the shark was over them. The sharks thrashed about and looked like they were in the middle of a seizure. I don't remember how much current they had, but I think the voltages were somewhere around 5 volts. Incorporating AC into a suit was one idea they tossed around, but I don't think anything came of it. The sharks would swim over the cabling when there was no current, but when it was switched on they would react very violently (not biting, thrashing). If they weren't over the wires, they stayed on the side of the pool they were on when the current was switched on.

Man, I hate having this memory.. I remember the general gist, but not the source and timeframe :(.

Google cache of a page.
http://74.125.93.132/search?q=cache:uZTB-ZwCNXIJ:www.elasmo-research.org/education/white_shark/deterrents.htm+does+Alternating+current+repel+sharks&cd=4&hl=en&ct=clnk&gl=us&client=firefox-a

Shows mixed success using 48 volt batteries. One test was extremely successful, when the electric repellent device was command activated at the approach of a shark, the other where the repellent device was always on... fish got ate in that one.
 
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