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It is designed to be attached to a PFD, but Scotty makes a deck fitting with a detachable 20-inch aluminum pole that gets the light up off the deck and an up into the air where it can be seen in all directions by other watercraft. The swaying of the kayak causes the light to twinkle like a very bright star or flash almost like a strobe light. I purchased the Scotty set up (which includes the Sea-Light) for $19.95.