Do shark shields or electronic shark defense systems work, you ask? Sure they do! Well it did last time we tested a similar product that produced an electrical field to keep the big “bities away” (an alternative to the ESDS, the Freedom 7 was reviewed here on this site in 2009 – see link ).
We have been using an electronic shark shield pretty much every second day in summer and occasionally even during winter for swimming protection since 2009 and we have not been eaten yet, although nearby sightings have been made. We are absolute believers in the principles that these work on and have done so since the practical first evaluation. We have just been given one that’s just been released to the market, the ESDS.
Check out Joe Baker’s review here.