The Raytheon Silent Knight APQ-174 Multi-Mode Radar (MMR) is designed to enable safe low-altitude navigation for a number of aircraft including Chinook, Blackhawk and Osprey.

It is a low probability of detection/interception radar that provides a terrain-following/avoidance function, a high-resolution display, and dive/climb commands to the pilot. Threat detection/identification and weather detection/severity are also included and it is fully compatible with night vision equipment.

The system enables all-weather, day/night navigation in high-threat environments as low as 100ft.

The recent UK order for the Chinook helicopter includes;

The Government of United Kingdom has requested a possible sale of sixteen (16) H-47 Chinook (Extended Range) helicopters; thirty-six (36) T-55-GA-714A engines (32 installed, 4 spares); forty-eight (48) embedded GPS inertial navigation units (32 installed, 16 spares); twenty (20) common missile warning systems (16 installed, 4 spares); twenty-two (22) radio-frequency countermeasures (16 installed, 6 spares); nineteen (19) multi-mode radars (16 installed, 3 spares); nineteen (19) electro-optical sensor systems (16 installed, 3 spares); forty (40) M-134D-T mini­ guns, plus mounts and tools (32 installed, 8 spares); and forty (40) M240H machine guns, plus mounts and tools (32 installed, 8 spares)

I wonder if those ‘multi-mode radars’ are the Silent Knight variety, or something more prosaic?