Hi Doug,
I have no experience with it. However, my first thought was that the added visibility was potentially a good thing. It appears that they are showing it used as a device to lift the victim out of the water. Maybe on a sailboat. In my opinion, it looks like it would be even harder than a lifesling for that purpose on a power boat. Remember the issues pointed out by Linda using your boat, for bringing an unconscious victim aboard. The attachment point on this "arch" looks to be much higher than the point on the sling, and it was a problem with the sling. The added visibility could be good though.
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Tom
Nanaimo, BC
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