We've seen UAVs that hover in the past, but if you're looking for something that eschews rotors for nearly silent ducted fans, you'll need to get your hands on the cyberQuad by Cyber Technology. The fans don't produce sparks (which is why this thing was recently tested with much success in an extended survey of an offshore drilling platform / oil rig damaged by fire), and its "perch and stare" capabilities mean that it can find a stable spot and sit unattended -- not only saving battery time that would otherwise be lost by hovering in place, but taking it all in with whatever video equipment / sensors the operator might have placed on-board. Just the thing for sniffing out enemy combatants and relaying
