AN/ZPY-3 Multi-Function Active Sensor (MFAS)

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The AN/ZPY-3 MFAS is a 360-degree field-of-regard active electronically scanned array radar designed for maritime surveillance. The X-Band two-dimensional sensor features a combination of electronic scanning and a mechanical rotation, allowing the radar to spotlight a geographic area of interest for longer periods to increase detection capabilities of smaller targets, particularly in sea clutter.

MFAS infographic
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The AN/ZPY-3 MFAS sensor is the first radar system to provide full 360-degree persistent coverage of both open oceans and littoral regions from extremely long ranges.

The AN/ZPY-3 MFAS sensor operates with a rotating sensor that incorporates electronic scanning and provides mode agility to switch between various surveillance methods. These include maritime-surface-search (MSS) mode for tracking maritime targets and inverse-synthetic-aperture radar (ISAR) mode for classifying ships. Image-while-scan capability is used to interleave very short duration ISAR functions (ISAR snapshot and high- range resolution) during MSS scans. Two synthetic aperture radar (SAR) modes are used for ground searches; spot SAR for images of the ground and stationary targets and strip SAR for images along a fixed line.

MQ-4C Triton 

The Northrop Grumman MQ-4C Triton (BAMS UAS) is a versatile maritime intelligence, surveillance and reconnaissance aircraft system that will perform maritime missions independently or in direct collaboration with fleet assets. Triton will play a key role in providing fleet commanders with a persistent, reliable picture of maritime surface contacts, covering vast areas of open ocean and littoral regions in a highly efficient manner.

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