S1850M

S1850M
Name	S1850M
Type	Long-range radar
Role	Air surveillance radar

S1850M

The S1850M is a long-range, passive electronically scanned array radar developed for wide-area air surveillance on naval platforms. It provides long-range detection, tracking, and identification support for fleet air defence, integrating with combat systems and command networks for situational awareness across contested maritime zones. The system is associated with major naval shipbuilding programmes, multinational procurement, and integration with combat systems and missile defenses.

Design and specifications

The S1850M is a long-range radar intended for integration with naval combat systems such as Aegis Combat System, PAAMS, SAMPSON radar, AN/SPY-1, Sea Viper, and SMART-L. Its architecture uses passive electronically scanned array technology similar to Active Electronically Scanned Array concepts employed by APG-77, AN/SPY-6, SAMPSON radar, and SMART-L. The radar is designed for 3D surveillance with range and height-finding capabilities akin to sensors on Hawkeye 2000, E-2D Advanced Hawkeye, and AWACS platforms. Typical installation integrates with combat management systems such as SIPRNet-linked networks, NATO command architectures, Link 16, and tactical datalinks used by Royal Navy, French Navy, and Royal Netherlands Navy. Specifications commonly cited include instrumented ranges comparable to long-range systems like AN/TPS-77, Lockheed Martin AN/SPY-1, and frequency bands related to L-band and S-band operations similar to SMART-L and RAN-3 family radars.

Development and production

Development involved multinational collaboration among defense contractors and shipbuilders, mirroring partnerships such as BAE Systems, Thales Group, MBDA, Lockheed Martin, Rolls-Royce, and DCNS. The programme aligns with frigate and destroyer projects like Horizon-class frigate, Type 45 destroyer, Daring-class destroyer, FREMM, Fridtjof Nansen-class frigate, and Air Warfare Destroyer acquisition timelines. Procurement decisions were influenced by multinational defence agreements including NATO interoperability requirements and European naval modernisation initiatives reflected in projects like PAAMS and SELEX Galileo collaborations. Production lines and integration trials occurred alongside shipyards such as BAE Systems Surface Ships, DCNS/Naval Group, Fincantieri, and Babcock International.

Operational history

The radar entered service on several major surface combatants during commissioning events similar to those for HMS Daring (D32), HMS Queen Elizabeth (R08), and HMS Prince of Wales (R09). Deployments have supported carrier strike groups, task forces, and NATO maritime patrols comparable to operations conducted by Operation Atalanta, Operation Active Endeavour, United Nations Maritime Task Force, and bilateral exercises with US Navy carrier strike groups. The sensor has been integrated into exercises such as Rimpac, Trident Juncture, and BALTOPS, providing air picture contributions alongside airborne assets like Boeing E-3 Sentry and Northrop Grumman E-2 Hawkeye. Its fielding paralleled naval upgrades seen in programmes like Sea Ceptor, Aster 30, and SM-2 equipped platforms.

Capabilities and performance

Capabilities include long-range air surveillance, track initiation, multi-target tracking, and cueing for anti-air missile systems comparable to Aster 15, Aster 30, SM-2, and Sea Viper interceptors. Performance claims emphasize detection of high-altitude and medium-altitude targets, including cooperative targets tracked via IFF transponders used in NATO operations, and passive detection aiding ballistic missile warning functions analogous to AN/SPY-6 and SMART-L contributions to layered defence. Integration with datalinks such as Link 11, Link 16, and naval tactical networks enables fused tracks with airborne assets like F-35B Lightning II, F/A-18E/F Super Hornet, Eurofighter Typhoon, and Rafale M. Electronic protection and anti-jam measures reflect practices found in modern radar suites from Thales Group and Raytheon.

Variants and upgrades

Several incremental upgrades and mission variants have been proposed or fielded, similar to evolutionary paths taken by SMART-L MM, AN/SPY-1A/B/C/D, and SAMPSON radar iterations. Upgrades include enhanced signal processing, extended-range modules, improved electronic counter-countermeasures reflecting work by BAE Systems and Thales Group, and integration packages for updated combat systems like Aegis Baseline 9 and PAAMS Mod2. Proposed variants parallel modular efforts seen in I-MAST and radar modernization programmes on Type 45 destroyer and Horizon-class frigate platforms.

Operators and deployment

Operators include navies that procure advanced air surveillance for surface combatants such as the Royal Navy, French Navy, Royal Netherlands Navy, Italian Navy, and other European maritime forces engaged in upgrading frigate and destroyer fleets. Deployments commonly occur on flagship platforms in carrier strike groups, amphibious ready groups, and multinational task forces led by nations associated with NATO and the European Union maritime security initiatives.

Incidents and notable uses

Notable uses include participation in multinational exercises and real-world deployments providing long-range air picture support during crisis response operations similar to Operation Unified Protector and maritime security patrols in regions like the Mediterranean Sea, North Atlantic Ocean, and Baltic Sea. Incidents involving sensor faults or maintenance recalls have followed patterns observed in complex radar programmes and industrial retrofits undertaken by defence contractors such as BAE Systems and Thales Group during shipyard availabilities.

Category:Naval radars