The MQ-9 unmanned aerial system (UAS) is equipped with a multi-mode maritime surface-search radar with Inverse Synthetic Aperture Radar (ISAR) mode, an Automatic Identification System (AIS) receiver, and High-Definition/Full-Motion Video sensor equipped with optical and infrared cameras. This comprehensive array of sensors provides real-time detection and identification of surface vessels over thousands of square nautical miles. A Raytheon SeaVue surface-search radar provides continuous tracking of maritime targets and correlation of AIS transmitters with radar tracks.
To see more about it : Unmanned Systems Technology