Printed from https://fiscalreceipts.com/program/0604014N/ — data as of August 12, 2026. Every figure is citation-backed; see the page online for per-number provenance.
F/A -18 Infrared Search and Track (IRST)
Budget Figures
FY2026 award data is a partial year — USASpending awards are reported on a rolling basis and the fiscal year does not close until September 30. why partial FY2026 data? →
| Fiscal year | Amount |
|---|---|
| FY24 | $31.2MR-1 TOA · PB2026 |
| FY25 | $8.63MR-1 TOA · PB2026 |
| FY26 | $0P-40 detail · PB2026 |
The vertical scale does not start at zero: the baseline sits just below this program’s smallest year, so a low point on this line is not a small amount. Read the shape for direction and the grid below for the figures.
● actuals (line) · ○ enacted · ◇ request — gaps are editions the program is absent from, never interpolated.
| Series | FY17 | FY18 | FY19 | FY20 | FY21 | FY22 | FY23 | FY24 | FY25 |
|---|---|---|---|---|---|---|---|---|---|
| Actuals | $0 | $68.1M | $104.5M | $111.1M | $81.8M | $47.6M | $54.5M | $31.2M | |
| Enacted | – | $0 | $108.7M | $112.4M | $84.2M | $48.8M | $55.1M | $32.1M | $8.63M |
| Request | – | – | $108.7M | $113.5M | $84.2M | $48.8M | $40.1M | $32.1M | $8.63M |
blank = series not published for this year; – = absent from that edition.
Asked vs spent: the PB2023 book requested $40.1M for FY2023; the PB2025 book reported $54.5M as actual total obligation authority — $14.4M above the request. 54.5 − 40.1 = 14.4 USD millions — the compact figures above are rounded for reading.
Program Lineage
Predecessors (funding flowed in)
- realigned from · per FY2026 J-book
show sentence
“IRST was previously funded under Program Element 0204136N F/A-18 Squadrons and has been transferred to Program Element 0604014N F/A-18 Infrared Search and Track.”
0604014N — F/A -18 Infrared Search and Track (IRST)Family Funding Line
Funding chain: 0204136N0604014N — F/A-18 Squadrons
- FY2017$189.1M
- FY2018$224.5M
- FY2019
0204136N$193.1M0604014N$108.7M - FY2020
0204136N$213.7M0604014N$113.5M - FY2021
0204136N$171.0M0604014N$84.2M - FY2022
0204136N$189.2M0604014N$48.8M - FY2023
0204136N$239.0M0604014N$40.1M - FY2024
0204136N$333.8M0604014N$32.1M - FY2025
0204136N$374.2M0604014N$8.63M - FY2026$369.9M
Description
Mission — F/A-18 Infrared Search and Track (IRST)
The AN/ASG-34A(V)1 F/A-18E/F Infrared Search and Track (IRST) system is a long-wave infrared sensor that provides a passive, out-of-band, alternate fire control system capable of detecting, tracking and engaging airborne targets, at long range, in a heavy electronic attack or radar-denied environment. IRST Block II is the primary out-of-band fire-control system for the F/A-18E/F, critical to organic passive air-to-air kill-chains required to compete with peer adversaries. Enables F/A-18E/F lethality by providing a passive means to detect, track, and target aircraft in highly contested environments in support of the objectives outlined in the National Defense Strategy. IRST enhances survivability by providing a fire-control solution without the need to radiate in the RF spectrum. The IRST system can autonomously, or in combination with other sensors, support the guidance of beyond-visual-range missiles including AIM-120C/D and AIM-9X Block II. The F/A-18E/F IRST system is an evolutionary Navy acquisition program with Block I and Block II capabilities. The USN is committed to further development of this component of the passive kill chain. This budget request supports Block II development and testing of a redesigned Infrared Receiver (IRR) and processor, enabling full Capabilities Development Document (CDD) capability over a larger field of regard. This budget request also supports development and testing of a redesigned Read-Out Integrated Circuit (ROIC). The ROIC vendor is not able to sustain production of the current design. The redesign will yield a more reliable configuration with potential production cost avoidances due to less usage of higher cost materials. IRST was previously funded under Program Element 0204136N F/A-18 Squadrons and has been transferred to Program Element 0604014N F/A-18 Infrared Search and Track.
Mission — F/A-18 Infrared Search and Track (IRST)
The AN/ASG-34A(V)1 F/A-18E/F Infrared Search and Track (IRST) system is a long-wave infrared sensor that provides a passive, out-of-band, alternate fire control system capable of detecting, tracking and engaging airborne targets, at long range, in a heavy electronic attack or radar-denied environment. IRST Block II is the primary out-of-band fire-control system for the F/A-18E/F, critical to organic passive air-to-air kill-chains required to compete with peer adversaries. Enables F/A-18E/F lethality by providing a passive means to detect, track, and target aircraft in highly contested environments in support of the objectives outlined in the National Defense Strategy. IRST enhances survivability by providing a fire-control solution without the need to radiate in the RF spectrum. The IRST system can autonomously, or in combination with other sensors, support the guidance of beyond-visual-range missiles including AIM-120C/D and AIM-9X Block II. The F/A-18E/F IRST system is an evolutionary Navy acquisition program with Block I and Block II capabilities. The USN is committed to further development of this component of the passive kill chain. This budget request supports Block II development and testing of a redesigned Infrared Receiver (IRR) and processor, enabling full Capabilities Development Document (CDD) capability over a larger field of regard.
Justification
Accomplishments & Planned Programs (1)
Infra-Red Search and Track (IRST)
Technology Development (TD) and Engineering and Manufacturing Development (EMD) of a fully integrated airborne IRST sensor for the F/A-18E/F. Block II is an engineering change to the Block I system which redesigns the Infrared Receiver (IRR) and processor to provide full Capabilities Development Document (CDD) capability over a larger field of regard. Block II will provide longer-range passive detection and tracking performance which enhances warfighting capability through improved engagement timelines and increased situational awareness.
Budget Line Items(workbook-cited)
P-1/R-1 workbook Total Obligation Authority basis (USD thousands) · PB2026.
Exhibit R-1
| Account | Org | Type | Amount |
|---|---|---|---|
| Research, Development, Test and Evaluation, Navy | N | FY24 Actuals | $31.2M |
| Research, Development, Test and Evaluation, Navy | N | FY25 Enacted | $8.63M |
| Research, Development, Test and Evaluation, Navy | N | FY25 Total | $8.63M |
Budget Details(R-2/P-40 facts)
J-book detail basis (R-2/P-40, USD millions) · PB2026 — a different accounting basis from the P-1/R-1 workbook TOA above; where the two disagree, the reconciliation strip under Budget Figures shows both.
Wider than this screen — swipe the table sideways for the remaining fiscal-year columns.
| Project | All Prior Years | FY24 Actuals | FY25 Total | FY26 Base | FY26 Request |
|---|---|---|---|---|---|
| Program Element | $451.2M | $31.2M | $8.63M | $0 | $0 |
| 2069: F/A-18 Infrared Search and Track (IRST) | $451.2M | $31.2M | $8.63M | $0 | $0 |
No follow-the-dollar view — this program's awards haven't been crosswalked at high confidence (flows cover 17 of 1,741 programs). why coverage is partial? →
Awards
No awards are linked to this program element at high confidence — the budget→award crosswalk only asserts links it can defend, and this line has none yet.
Lobbying Mentions
No Senate LDA lobbying filing in the tracked data mentions this program element by code or alias.
Oversight
Department-level designation (not specific to this program)
GAO lists 5 high-risk areas for DOD as a whole. That designation covers the department, not F/A -18 Infrared Search and Track (IRST) — no program-specific GAO finding for this line is in the ingested data. See the DOD oversight record.
No research dossier for this program — dossiers cover 50 of 1,741 programs, the largest fully J-book-detailed lines by FY2026 requested dollars. why no dossier here? →