Flight testing of the MQ-4C Triton with its main sensor, the Multi-Function Active Sensor (MFAS) AESA radar, has started on Apr. 18.
![150416-N-JQ696-003[1]](http://alert5.com/wp-content/uploads/2015/04/150416-N-JQ696-0031-500x332.jpg)
Photo: NAVAIR
The radar was switched to its primary operating mode, known as Maritime Surface Surveillance (MSS), during the flight over Patuxent River.
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