The remotely-piloted MQ 9 Reaper UAVs are similar to the ones seeking out (and destroying) targets in Eastern Afghanistan, and can stay aloft for 18 hours at a time -- good for patrolling massive stretches of ocean. When flying high, the Reaper is virtually invisible and its radar signature negligible, giving it the drop on any would-be hijackers. While Reapers can be armed with up to 14 Hellfire missiles, the UAVs patrolling the waters off Somalia aren't packing munitions. Instead, they are armed with cameras that can zoom in on suspected pirates from heights of up to 50,000 feet. Those high-powered optics, coupled with infrared sensors, could be the key to discouraging piracy in the long run.