Covert I know about the unwritten rule, but I say: hey stuff it! What's the point of having a shield and not useing it! I dive with you guys without one and that's a risk I take cos I want to dive with buddies and not alone. I don't know if the shield actually attracts them, even if it does, so does blood in the water, so does splashing, so does fish struggeling on the spear. There are a hundred other reasons why a GW should come investigate you even without a shark shield. and If a Shark does come investigate I'd rather have a buddy watching my back than the alternative of having to face a great white alone! So when I'm with you I really don't mind at all, use it by all means! it will in all likeliness be of benefit to both of us rather than a disadvantage to one in the event of an encounter. Besides I don't think it will be too long before I get myself one. I have now fully convinced my wife that she will not see yellowtail on our table until I get a sharkshield!