Half a croissant, on a plate, with a sign in front of it saying '50c'
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anti-shark torpedo

small autonomous torpedo that head butts sharks like a dolphin
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Dolphins have been know to help humans pushing drowning people to shore or driving sharks away by ramming them. The problem is if there isn't a dolphin around and you need a shark driven away. When a life guard sees a shark attacking some one they launch the anti-shark torpedo. A two meter long rubber tipped shark ramming machine. By using 3d imaging sonar and acoustic sensors the torpedo races towards the attack site then then engages a terminal guidance system modeled on the sharks own neuro-electrical senses, hitting the shark at speeds up to 30 MPH.
duroncrush, Jul 21 2011

Lifeguard trebuchet Lifeguard_20trebuchet
Prior Art [8th of 7, Jul 21 2011]

Completely unrelated Human Precipitation Defence Programme
Although does concern maverick use of Life Guard Trebuchets. [theleopard, Jul 21 2011]

[link]






       Beyond the fact that this uses nearly-magical technology and poses a serious risk of injury or even death to all those between the launcher and the shark (including the shark attack victim), there are far simpler ways of deterring shark attacks already in practice. Introducing a new one is like coming up with a new way to prevent people from being struck by lightning.
Alterother, Jul 21 2011
  

       Sorry, [dc], but I think that life guard catapults (search the bakery) are a better way to go, and more ecologically sound in these shark-depleted days.
normzone, Jul 21 2011
  

       You could market this to Egypt if they had an economy right now.
Alterother, Jul 21 2011
  

       "Any sufficiently advanced technology is indistinguishable from magic." Arthur C Clark
duroncrush, Jul 21 2011
  

       [normzone], I had a search for life guard catapults, because it sounds brilliant, but all I could find was the Human Precipitation Defence Programme. A brilliant idea in itself to be fair, but unless my search was faulty, you should post that...
theleopard, Jul 21 2011
  

       <link>
8th of 7, Jul 21 2011
  

       Ha, seems it already has one of my stale croissants. Still, shows my taste in ideas hasn't changed.   

       <edit> Oh, it's only six months old. I'm going mad.
theleopard, Jul 21 2011
  

       Going, going, gone ...
8th of 7, Jul 21 2011
  

       "Any proposed but probably impossible by current means and certainly insufficiently-explained technology is indistinguishable from magic."   

       ~Alterother
Alterother, Jul 21 2011
  
      
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