^ 'Defense & Security Intelligence & Analysis: IHS Jane's – IHS'.Archived from the original (PDF) on 29 September 2011.

Archived from the original on 21 July 2012. The updated AN/APG-78 radar for the AH-64E Guardian has overwater capabilities, potentially enabling naval strikes.

A radio modem integrated with the sensor suite allows data to be shared with ground units and other Apaches, allowing them to fire on targets detected by a single helicopter. The APG-78 is capable of simultaneously tracking up to 128 targets and engaging up to 16 at once an attack can be initiated within 30 seconds. The radome's raised position enables target detection while the helicopter is behind obstacles (e.g. The AN/APG-78 Longbow is a millimeter-wave fire-control radar (FCR) target acquisition system and the Radar Frequency Interferometer (RFI), which are housed in a dome located above the main rotor.