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Title: great for boating safety
Review: Bought this for boating emergencies (well, in the unlikely case that my boat sinks or that I need to otherwise attract attention). I keep it near at hand, whenever boating. Most boaters don't think about this, neither did I until I learned that astronauts carried these (similar items) on space flights. No batteries, no flares to replace. And a pretty good price, to boot.
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