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Survivable Airborne Operations Center (SAOC)

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What it is
Survivable Airborne Operations Center (SAOC), program element 0604288F, is a U.S. Air Force development program funded in the Research, Development, Test and Evaluation, Air Force account. The SAOC, designated the E-4C, replaces the aging E-4B fleet, which faces capability gaps, diminishing manufacturing sources, rising maintenance costs, and parts obsolescence as it nears the end of its serviceable life.
What changed
+$215.9M FY25→26 R-1 TOA · PB2026
Who gets it
No single contractor is published as this line's leader. 1 linked award record is listed below. This line's high-confidence links do not clear the floor for a published concentration index — at least 3 awards across 2 contractor families holding positive obligations, with positive net linked dollars. Why the crosswalk is partial.

Budget figures

FY24 Actuals
$717.6MR-1 TOA · PB2026
FY25 Total
$1.62BR-1 TOA · PB2026
FY26 Request
$1.83BR-1 TOA · PB2026
0.4% reconciliation

$1.83B discretionary + $6.80M one-time reconciliation. Discretionary change vs FY2025 enacted: +12.9%.

FY25→26 Change
+$215.9MR-1 TOA · PB2026
Data coverage

FY2026 award data is a partial year — USAspending reports awards on a rolling basis, and this corpus runs through 2026-09-04. why partial FY2026 data? →

Budget trajectory

The program's 3 summary figures for FY24 to FY26, plotted in fiscal-year order: this line ends higher than it starts. The points are the summary cards above, not a separate derivation; the table beside the chart carries each figure with its own citation.
The program's 3 summary figures for FY24 to FY26, plotted in fiscal-year order: this line ends higher than it starts. The points are the summary cards above, not a separate derivation; the table beside the chart carries each figure with its own citation.FY24: $717.6MFY25: $1.62BFY26: $1.83BFY24FY25FY26
Budget trajectory: one row per fiscal year, carrying the summary figure the sparkline plots. Every figure opens its own citation.
Fiscal yearAmount
FY24$717.6M
FY25$1.62B
FY26$1.83B

All series figures: R-1 TOA · PB2026

Decade view

P-1/R-1 workbook TOA basis, shown compact in $B/$M (the workbook records USD thousands); each figure cites its own President's Budget edition

11 fiscal years of this program as published (FY2016–FY2026): a line through the actuals (filled dots), with the enacted (hollow circles) and request (diamonds) markers each edition reported. Read it for direction, not for precision — this program's actuals line rises across the span. The grid below is the same data as text, one cited figure per cell.
11 fiscal years of this program as published (FY2016–FY2026): a line through the actuals (filled dots), with the enacted (hollow circles) and request (diamonds) markers each edition reported. Read it for direction, not for precision — this program's actuals line rises across the span. The grid below is the same data as text, one cited figure per cell.FY2016 actuals — PB2018 editionFY2017 actuals — PB2019 editionFY2018 actuals — PB2020 editionFY2019 actuals — PB2021 editionFY2020 actuals — PB2022 editionFY2021 actuals — PB2023 editionFY2022 actuals — PB2024 editionFY2023 actuals — PB2025 editionFY2024 actuals — PB2026 editionFY2017 enacted — PB2018 editionFY2018 enacted — PB2019 editionFY2019 enacted — PB2020 editionFY2020 enacted — PB2021 editionFY2021 enacted — PB2022 editionFY2022 enacted — PB2023 editionFY2023 enacted — PB2024 editionFY2024 enacted — PB2025 editionFY2025 enacted — PB2026 editionFY2018 request — PB2018 editionFY2019 request — PB2019 editionFY2020 request — PB2020 editionFY2021 request — PB2021 editionFY2022 request — PB2022 editionFY2023 request — PB2023 editionFY2024 request — PB2024 editionFY2025 request — PB2025 editionFY2026 request — PB2026 editionFY16FY18FY20FY22FY24FY26

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.

Decade series values by fiscal year and President's Budget edition: one row per series (actuals, enacted, request), one column per fiscal year. Every figure opens its own citation.
SeriesFY16FY17FY18FY19FY20FY21FY22FY23FY24FY25FY26
Actuals$0$0$6.14M$7.17M$12.2M$50.0M$91.4M$94.7M$717.6M
Enacted–$0$7.85M$7.44M$12.7M$59.4M$95.8M$98.2M$888.8M$1.62B
Request–$7.85M$9.74M$16.7M$76.4M$133.3M$203.2M$888.8M$1.69B$1.83B

blank = series not published for this year; – = absent from that edition.

Asked vs spent: the PB2024 book requested $888.8M for FY2024; the PB2026 book reported $717.6M as actual total obligation authority — $171.2M below the request. 717.6 − 888.8 = -171.2 USD millions — the compact figures above are rounded for reading.

Program lineage

No predecessor/successor lineage was recorded for this program element — no FY-to-FY transfer into or out of this line was stated in the ingested J-books, and none was inferred from the program structure.

Description

Mission — Survivable Airborne Operations Center (SAOC)

The Survivable Airborne Operations Center (SAOC), E-4C, replaces the aging E-4B fleet, which faces capability gaps, diminishing manufacturing sources, increased maintenance costs, and parts obsolescence as it approaches the end of its serviceable life. SAOC provides the President of the United States (POTUS), the Secretary of Defense (SECDEF), and the Joint Chiefs of Staff (JCS) a worldwide, survivable, and enduring node of the National Military Command System (NMCS) to fulfill national security requirements throughout all stages of conflict. As a command, control and communications center directing US forces, executing emergency war orders and coordinating the activities of civil authorities including national contingency plans, this capability ensures continuity of operations and continuity of government as required in a national emergency or after negation/destruction of ground command and control centers. SAOC fulfills the requirements of the AF Nuclear Mission by providing Nuclear Command, Control and Communications (NC3) capabilities to enable the exercise of authority and direction by the President to command-and control US military nuclear weapons operations. Program funding supports all activities required to execute development of the SAOC Weapon System to include system development, integration of NC3 and other DoD/AF programs into the SAOC weapon system, test activities, pre-operational product support, and Interim Contractor Support (ICS). Funds also support program office operations, management services (Federally Funded Research and Development Centers [FFRDC], Advisory and Assistance Services [A&AS], etc.), Program Management Administration (PMA), security, facilities, prototyping, equipment, implementation of digital program initiatives, and other required program office capabilities. This program element may include necessary civilian pay expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program element 0605829F, 0605831F, 0605833F, or 0605898F. In FY 2024, $1.540M expended for civilian pay expenses in this program element. In FY 2025, $4.000M is forecasted for civilian pay expenses in this program element, and in FY2026, $5.49M is forecasted for civilian pay expenses in this program element. SAOC program transitioning from BA04 to BA05, System Development and Demonstration (SDD), in FY26. This effort is in Budget Activity 4, Advanced Component Development and Prototypes (ACD&P), because efforts are necessary to evaluate integrated technologies, representative modes or prototype systems in a high fidelity and realistic operating environment.

Mission — Survivable Airborne Operations Center

The Survivable Airborne Operations Center (SAOC), E-4C, replaces the aging E-4B fleet, which faces capability gaps, diminishing manufacturing sources, increased maintenance costs, and parts obsolescence as it approaches the end of its serviceable life. SAOC provides the President of the United States (POTUS), the Secretary of Defense (SECDEF), and the Joint Chiefs of Staff (JCS) a worldwide, survivable, and enduring node of the National Military Command System (NMCS) to fulfill national security requirements throughout all stages of conflict. As a command, control and communications center directing US forces, executing emergency war orders and coordinating the activities of civil authorities including national contingency plans, this capability ensures continuity of operations and continuity of government as required in a national emergency or after negation/destruction of ground command and control centers. SAOC fulfills the requirements of the AF Nuclear Mission by providing Nuclear Command, Control and Communications (NC3) capabilities to enable the exercise of authority and direction by the President to command-and control US military nuclear weapons operations. Program funding supports all activities required to execute development of the SAOC Weapon System to include system development, integration of NC3 and other DoD/AF programs into the SAOC weapon system, test activities, pre-operational product support, and Interim Contractor Support (ICS). Funds also support program office operations, management services (Federally Funded Research and Development Centers [FFRDC], Advisory and Assistance Services [A&AS], etc.), Program Management Administration (PMA), security, facilities, prototyping, equipment, implementation of digital program initiatives, and other required program office capabilities. This program element may include necessary civilian pay expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program element 0605829F, 0605831F, 0605833F, or 0605898F. In FY 2024, $1.540M expended for civilian pay expenses in this program element. In FY 2024, $4.000M is forecasted for civilian pay expenses in this program element. The FY 2026 request for SAOC includes $1,826,328 thousand of discretionary and $6,800 thousand of mandatory (reconciliation) for a total of $1,833,128 thousand. The mandatory funds address EMD in FY 2026. Further information for this reconciliation request is provided in Chapter 8 (Nuclear) of the Reconciliation Exhibit. This program is in Budget Activity 5, System Development and Demonstration (SDD) because it has passed Milestone B approval and is conducting engineering and manufacturing development tasks aimed at meeting validated requirements prior to full rate production.

Justification

Accomplishments & Planned Programs (2)

SAOC

The SAOC weapon system is comprised of a Commercial Derivative Aircraft (CDA), mission system, and ground support systems. The CDA will be hardened to protect against nuclear and electromagnetic effects and modified with an aerial refueling capability to enable sustained airborne operations. The mission system will integrate secure communications and planning capabilities on modern information technology (IT) infrastructure based on a Modular Open System Approach (MOSA). The ground systems include aircrew trainers, mission crew trainers, maintenance training devices, ground support equipment, test and sustainment system integration laboratories, and other ground systems to enable the operations, sustainment, and future modifications of the SAOC weapon system across the lifecycle.

SAOC

The SAOC weapon system is comprised of a Commercial Derivative Aircraft (CDA), mission system, and ground support systems. The CDA will be hardened to protect against nuclear and electromagnetic effects and modified with an aerial refueling capability to enable sustained airborne operations. The mission system will integrate secure communications and planning capabilities on modern information technology (IT) infrastructure based on a Modular Open System Approach (MOSA). The ground systems include aircrew trainers, mission crew trainers, maintenance training devices, ground support equipment, test and sustainment system integration laboratories, and other ground systems to enable the operations, sustainment, and future modifications of the SAOC weapon system across the lifecycle.

Budget line items(workbook-cited)

P-1/R-1 workbook Total Obligation Authority basis (USD thousands) · PB2026.

Exhibit R-1

AccountOrgTypeAmount
Research, Development, Test and Evaluation, Air ForceFFY24 Actuals$717.6M
Research, Development, Test and Evaluation, Air ForceFFY25 Enacted$1.62B
Research, Development, Test and Evaluation, Air ForceFFY25 Total$1.62B
Research, Development, Test and Evaluation, Air ForceFFY26 Disc. Request$1.83B
Research, Development, Test and Evaluation, Air ForceFFY26 Reconciliation$6.80M
Research, Development, Test and Evaluation, Air ForceFFY26 Total$1.83B

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.

ProjectAll Prior YearsFY24 ActualsFY25 TotalFY26 BaseFY26 Request
Program Element — line 1$0$717.6M$1.62B$0$0
646507: Survivable Airborne Operations Center (SAOC)$0$717.6M$1.62B$0$0
656507: Survivable Airborne Operations Center$0$0$0$1.83B$1.83B
Program Element — line 2—$0$0$1.83B$1.83B

Follow the dollar

Appropriation → program element → top high-confidence awards → recipient families → congressional districts.

Follow-the-dollar covers 312 of 1,938 programs — only high-confidence budget→award links are shown. why coverage is partial? →

The program's money traced left to right: the F appropriation, program element 0604288F (Survivable Airborne Operations Center (SAOC)), its 1 largest high-confidence awards, the 1 recipient family behind them, and the 1 congressional district the work is recorded in. Read it for concentration — how few families and districts the awards run through. Amounts inside the diagram are illustrative per-award transaction sums; the table below carries the cited per-district obligations.
The program's money traced left to right: the F appropriation, program element 0604288F (Survivable Airborne Operations Center (SAOC)), its 1 largest high-confidence awards, the 1 recipient family behind them, and the 1 congressional district the work is recorded in. Read it for concentration — how few families and districts the awards run through. Amounts inside the diagram are illustrative per-award transaction sums; the table below carries the cited per-district obligations.APPROPRIATIONPROGRAM ELEMENTTOP AWARDSRECIPIENT FAMILIESDISTRICTSFRDT&E appropriation0604288F1.83B FY26FA283424CB002SIERRA NEVADA COMPANY, LLC3.45BSierra Nevada Company, LLCCO-04

The diagram illustrates the cited table below — amounts shown in the diagram are transaction sums per award (no citation chips); the per-district obligations in the table cite USAspending queries.

The diagram as text: one row per congressional district in the diagram, the recipient families shown there, and that district's cited program obligations.
DistrictProgram obligations
CO-04$3.42B

Related awards

Award linkage is shown for 32 of 200 profiled companies — high- and medium-confidence USAspending matches, each row labeled; medium is the weaker evidence. why partial award coverage? →

RecipientPIIDConfidence
SIERRA NEVADA COMPANY, LLCFA283424CB002high

Contractor concentration

No concentration index is published for this line. This line's high-confidence links do not clear the floor for a published concentration index — at least 3 awards across 2 contractor families holding positive obligations, with positive net linked dollars. An index below that floor is a fact about the sample, not about the market. Whatever further links this line carries are medium-confidence, and what each medium evidence path does and does not establish is set out in the methodology. Both bases are in the downloadable warehouse.

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 Survivable Airborne Operations Center (SAOC). No program-specific GAO finding for this line is in the ingested data. See the DOD oversight record.

Program dossier

Every sentence below carries its citation — warehouse figures open the citation panel, news claims link the cached source.

Research dossiers exist for 50 of 1,938 programs — the 50 largest fully J-book-detailed programs by FY2026 request. why no dossier here? →

What it is

  • Survivable Airborne Operations Center (SAOC), program element 0604288F, is a U.S. Air Force development program funded in the Research, Development, Test and Evaluation, Air Force account.
  • The SAOC, designated the E-4C, replaces the aging E-4B fleet, which faces capability gaps, diminishing manufacturing sources, rising maintenance costs, and parts obsolescence as it nears the end of its serviceable life.
  • SAOC is intended to give the President, the Secretary of Defense, and the Joint Chiefs of Staff a worldwide, survivable, enduring node of the National Military Command System to ensure continuity of operations and continuity of government during a national emergency or after ground command-and-control centers are lost.
  • The program fulfills the Air Force nuclear mission by providing Nuclear Command, Control and Communications (NC3) capabilities so the President can command and control U.S. military nuclear-weapons operations.
  • The SAOC weapon system comprises a Commercial Derivative Aircraft (CDA), a mission system, and ground support systems.
  • The aircraft is to be hardened against nuclear and electromagnetic effects and modified with aerial-refueling capability for sustained airborne operations, while the mission system integrates secure communications and planning on a modern IT infrastructure built on a Modular Open System Approach (MOSA).
  • Ground systems for the program include aircrew trainers, mission-crew trainers, maintenance training devices, ground support equipment, and test and sustainment system-integration laboratories to enable operations, sustainment, and future modifications across the weapon system's lifecycle.

Why it matters

  • The program's total funding grows from $1,617,187 thousand in FY2025 to $1,833,128 thousand (about $1.83 billion) requested for FY2026.
  • That is a year-over-year increase of $215,941 thousand (roughly $216 million) from FY2025 to FY2026.
  • In FY2024 the program recorded actual spending of $717,641 thousand (about $718 million), so the FY2026 request is more than two-and-a-half times its FY2024 execution level.
  • The FY2026 request is almost entirely discretionary: a discretionary request of $1,826,328 thousand (about $1.83 billion) makes up the bulk of the total.
  • A small reconciliation (mandatory) request of $6,800 thousand (about $6.8 million) is added to the discretionary base to reach the $1,833,128 thousand FY2026 total.
  • The money flows through a single named project, the Survivable Airborne Operations Center, funded at about $1,826.3 million in the FY2026 budget year.
  • That same SAOC project line was funded at about $1,617.2 million in the current year (FY2025) and about $717.6 million in the prior year (FY2024), showing the program's rapid growth as development advances.

Key players

  • The program is run by the U.S. Air Force, with funding drawn from the Research, Development, Test and Evaluation, Air Force appropriation.
  • The program's users are the President, the Secretary of Defense, and the Joint Chiefs of Staff, whom SAOC is designed to serve as a survivable airborne node of the National Military Command System.
  • Program funding also supports program-office operations and management services, including Federally Funded Research and Development Centers (FFRDCs) and Advisory and Assistance Services (A&AS), alongside Interim Contractor Support during development.

Primary sources

Open any budget figure for its exact receipt. Verified line items lead with the highlighted government PDF; original spreadsheets download with their budget edition and exhibit in the filename.

Budget totals · TOA sources

Detailed budget justification

The related TOA spreadsheets above use a different accounting basis from R-2/P-40 detail. Their amounts are not assumed to match these detailed sources.