Got a new Kit? Want some advice? Discuss your gear here!
With all that's going on in the water the last year, I'm thinking of getting a ESDS or Shark Shield. I know many say it's not 100% so not worth it, but neither is a seatbelt. If it lowers the possible risk, then it's tempting.
I like the idea of the ESDS as its smaller and doesn't have the lead to shock you, but what about the strength of the signal and other features. At ideas?
My understanding is that the ESDS isn't as powerful, and not tested as much as the Sharkshield. After seeing an ESDS in a dive shop on sunday, they are a really neat little unit, and dont require the diver to switch them on or off manually, they are water activated. AND unless you touch both the Electrodes at the same time, no risk of a zap. However, I still love my Shark Shield. Until I see more study on the ESDS i won't be buying one.
Just my 2 cents.
In full disclosure, I'm the one of the new owners of Shark Shield (I live in Perth) and the Managing Director.
Shark Shield has been on the market for 10 years now (we've had several models over the years) and the technology was developed by the NATAL Shark Board out of South Africa who is globally recognised for their expertise in sharks. It's the only product on the market that has lasted more than a couple of years and the only product that's been proven again and again to deter sharks.
I understand that the compact size of the ESDS unit is attractive, however, if you understand the physics of how the device operates, you'll understand why we have such a long antenna. Since the strength of the field comes from the distance between the electrodes and their electrodes are very close together, I would expect their signal to be quite weak. Additionally, the unit only sends out a pulse every 2.5 seconds compared to every 0.6 seconds for Shark Shield. We’ve conducted our own testing and found that at 1m away from the unit, the power of their electric field is 10% of ours. With our longer antenna and more electric field we create, our devices create a 6-10m diameter protective area around the user. This area would be much smaller on an ESDS because the signal is far weaker and the electrodes much closer, causing much less impact on sharks.
Last edited by sharkshield on Sun Aug 05, 2012 1:37 pm, edited 2 times in total.
Ahh but if you're going to wear something that may or may not deter a shark while not wear something comfortable. Always good to get impartial input.
It was the Law of the Sea, they said. Civilization ends at the waterline. Beyond that, we all enter the food chain, and not always right at the top.
Hunter S. Thompson
A few guys i have spoken to put a small hole in tier fin, and use a cable tie to hold the whip in place. Bear in mind though, most guys I dive with are freedivers, so the longer fins help more.
We do have a scuba mount version that has an electrode on the tank and a shorter antenna.....we're waiting on more antennas at the moment, so it's back ordered, but it is available. Here's the link: