U.S. Navy Enhances F/A-18 Super Hornet Capabilities with IRST21 Sensor Deployment

In November 2024, the U.S. Navy declared Initial Operational Capability (IOC) for the Infrared Search and Track (IRST) Block II system, marking a significant advancement for the F/A-18E/F Super Hornet fleet. Developed by Lockheed Martin, the IRST21 sensor is a passive, long-range infrared system designed to detect and track airborne threats without emitting radar signals, thereby enhancing the aircraft's effectiveness in contested environments.

Key Features of the IRST21 Sensor:

• Passive Detection: The IRST21 operates without emitting signals, reducing the aircraft's likelihood of detection by adversaries.

• Long-Range Tracking: Capable of identifying and monitoring targets at extended distances, providing pilots with increased reaction time.

• Enhanced Survivability: By avoiding radar emissions, the system minimizes exposure to enemy electronic warfare tactics.

The journey to IOC involved rigorous testing phases. The Air Test and Evaluation Squadron (VX) 9 conducted Initial Operational Test and Evaluation (IOT&E), collaborating with teams from VX-31 and VX-23. This comprehensive approach ensured the IRST21's performance met operational standards in realistic scenarios.

Rear Admiral John Lemmon, Program Executive Officer for Tactical Aircraft Programs, emphasized the system's significance, stating that the passive infrared capability is crucial for aircrew survivability, especially in environments where radar may be compromised.

Captain Michael Burks, PMA-265 Program Manager, highlighted the collaborative efforts that brought the IRST21 to operational status. He noted that the sensor complements the AN/APG-79 fire control radar, enhancing air-to-air detection and guiding beyond-visual-range missiles.

The IRST21 Block II is part of an evolutionary upgrade strategy. The initial Block I, introduced in 2011, integrated an existing IRST system onto the F/A-18's fuel tank. Block II offers an improved sensor, upgraded processor, and enhanced software, with the first operational deployment scheduled for 2025.

A decision on full-rate production is anticipated in spring 2025, aiming to equip carrier-based F/A-18E/F Super Hornet squadrons with the advanced IRST Block II system. Hank Tucker, Vice President of Mission Systems at Lockheed Martin, remarked that passive sensing technologies like IRST21 are transforming air combat operations, keeping pilots ahead of evolving threats.

The integration of the IRST21 sensor into the Super Hornet fleet represents a significant leap in the U.S. Navy's tactical capabilities, ensuring that pilots are better equipped to handle modern aerial threats.