I recently encountered a 3m juvenile white shark off Albany, Western Australia whilst spearfishing. I was in 16m of water when it came from behind at speed. The first I knew was the shadow above me and the the shark turning about 6-8m in front of me, giving me a complete side profile. It circled me slowly then came in again at speed but you could definitely see the shark turn away at approx 4-6m before it disappeared into the depths.
I believe that the shark ambushed me from behind and was zapped by the Ocean Guardian electrical field, then came in again where it was zapped again.
I believe the Ocean Guardian saved me from an attack and was money well spent. I will be purchasing another for my son ASAP.