PaklovesTurkiye
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It's not supposed to compete with sonar for detection. It's a navigation radar for maneuvering in confined spaces or congested waters where sonar usage is either restricted (active) or becomes mired in the clutter of coastal waters (passive). Many smaller boats have equally small RCS, hence why the SharpEye's pitch makes note of its ability to detect low RCS vessels, this will help ensure the submarine can safely transit in bottled-up waters or waters with high traffic when on the surface.
Launched in 2006, more than 25 navies now use SharpEye™ radars and displays, which delivers improvements in sub-clutter visibility by approximately 30dB, enabling targets with a low Radar Cross Section (RCS), typically 0.5m2, to be detected even in heavy rain and high sea states. Doppler processing enables clutter removal without picture degradation. This combined with a host of other unique and special features in the radar sensor, provides an unprecedented level of situational awareness.
Note: this does not equal counter-stealth capabilities. The low-RCS detection capability are meant to track small boats like coastal fishing vessels in adverse conditions, not stealthy warships at standoff ranges.
You'll find them on larger vessels too, but again, they don't replace the larger radars like SPY-1F (look atop the SPY-1 mast and below the forward SPG-62)
Smaller boats like RHIBs also have such radars, although in this case the array is static and does not rotate.
It'll make them safer when transiting near-shore waters or moving for sea-to-port or port-to-sea, but it's nothing overly special. Rating it kind of seems unnecessary. It does its job.
The type is already in use on the RN's Type 45 destroyers (look directly above the bridge, almost half-way up the mast).
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