UNMANNED AERIAL  VEHICLE's

The type we saw leaving ships in the Gulf.

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The most common type of UAV or "drone" is the Predator aircraft, which flies at lower altitudes, making it more vulnerable to anti-aircraft attack. The small, $3.2 million pilotless plane normally operates at 10,000 to 15,000 feet and is capable of flying a maximum of 24 to 30 hours.  
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See: "Predator B"     and     "Global Hawk"

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