Program · United States · U.S. Air Force
Compass Call
Compass Call · Government program · U.S. Air Force
Variants2
EA-37B Compass CallFielded- EC-130H Compass Call—
Variants of this program. Their unit costs, quantities and operating costs are in the cost table below.
Cost to the Government
| Measure | Amount | Source |
|---|---|---|
| Program totals · 2 | ||
| FY2027 rehosting procurement requestThree additional aircraft; request is not an executed award. | $660MThen-year $ | FY2027 Aircraft Procurement, Volume I, April 2026, P-40 exhibits U.S. Air Force · figure FY2027 request |
| R&D program totalA separately identified lifetime development total has not been verified. This is not a zero-cost estimate. | Not established | — |
| Unit costs · 1 | ||
| Gross weapon-system unit estimateThree aircraft for $660M in the P-40 rehosting line; includes integration and installation but excludes separately budgeted BA05 modifications. | $220MThen-year $ | FY2027 Aircraft Procurement, Volume I, April 2026, P-40 exhibits U.S. Air Force · figure FY2027 budget request |
| Quantities · 2 | ||
| Airframes procured to date in budget narrativeFive Baseline 3 and seven Baseline 4 airframes; a purchase count, not delivered operational aircraft. | 12U.S. only | FY2027 Aircraft Procurement, Volume I, April 2026, P-40 exhibits U.S. Air Force · figure FY2027 budget submission |
| U.S. inventoryA dated, variant-specific U.S. fleet count has not been verified. | Not established | — |
| Operating costs · 1 | ||
| Annual O&S / aircraftNo EA-37B-specific annual ownership cost or reimbursement rate verified. EC-130H and commercial G550 costs are not substitutes. | Not established | — |
Program totals · 2
- FY2027 rehosting procurement requestThree additional aircraft; request is not an executed award.FY2027 Aircraft Procurement, Volume I, April 2026, P-40 exhibits U.S. Air Force · figure FY2027 request$660MThen-year $
- R&D program totalA separately identified lifetime development total has not been verified. This is not a zero-cost estimate.Source not recordedNot established
Unit costs · 1
- Gross weapon-system unit estimateThree aircraft for $660M in the P-40 rehosting line; includes integration and installation but excludes separately budgeted BA05 modifications.FY2027 Aircraft Procurement, Volume I, April 2026, P-40 exhibits U.S. Air Force · figure FY2027 budget request$220MThen-year $
Quantities · 2
- Airframes procured to date in budget narrativeFive Baseline 3 and seven Baseline 4 airframes; a purchase count, not delivered operational aircraft.FY2027 Aircraft Procurement, Volume I, April 2026, P-40 exhibits U.S. Air Force · figure FY2027 budget submission12U.S. only
- U.S. inventoryA dated, variant-specific U.S. fleet count has not been verified.Source not recordedNot established
Operating costs · 1
- Annual O&S / aircraftNo EA-37B-specific annual ownership cost or reimbursement rate verified. EC-130H and commercial G550 costs are not substitutes.Source not recordedNot established
Earlier observations · 2
Superseded estimates and prices, each in its original scope and dollar basis.
| Measure | Amount | Source |
|---|---|---|
| Gross weapon-system unit estimateTwo aircraft for $400M in the same P-40 series. | $200MThen-year $ | FY2027 Aircraft Procurement, Volume I, April 2026, P-40 exhibits U.S. Air Force · figure FY2026 |
| Gross weapon-system unit estimateThree aircraft for $660M in the P-40 rehosting line; includes integration and installation but excludes separately budgeted BA05 modifications. | $220MThen-year $ | FY2027 Aircraft Procurement, Volume I, April 2026, P-40 exhibits U.S. Air Force · figure FY2027 budget request |
- Gross weapon-system unit estimateTwo aircraft for $400M in the same P-40 series.FY2027 Aircraft Procurement, Volume I, April 2026, P-40 exhibits U.S. Air Force · figure FY2026$200MThen-year $
- Gross weapon-system unit estimateThree aircraft for $660M in the P-40 rehosting line; includes integration and installation but excludes separately budgeted BA05 modifications.FY2027 Aircraft Procurement, Volume I, April 2026, P-40 exhibits U.S. Air Force · figure FY2027 budget request$220MThen-year $
Airframes, conversion and modernization
The procurement exhibit covers aircraft purchase, mission-kit installation, integration and test, while separate modification lines fund other work. Italy’s smaller BAE subcontract buys mission-system work, not two complete aircraft.
Contracts & purchasing · 1
Ceilings, options and purchase agreements are not spending and are never added together. Obligations are under Contracts.
| Buyer → seller | Status | Value | Qty | Source |
|---|---|---|---|---|
| Italy via L3Harris → BAE SystemsIntegration support for two Italian EA-37B aircraft; not their full acquisition cost. | Mission-system engineering subcontract | $12M | 2 | Italy EA-37B mission-system contract, July 21, 2025 BAE Systems · figure Jul 21, 2025 |
International buyers · 1
| Country | Variant | Qty | Status | Source |
|---|---|---|---|---|
| ItalyMission-system subcontract covers two Gulfstream G550 conversions. Foreign program kept separate from the U.S. fleet. | — | 2 | Aircraft conversion contract | Italy EA-37B mission-system contract, July 21, 2025 BAE Systems · figure Jul 21, 2025 |
Open research: Figures retain the date and scope of the original source. A historical count, cumulative delivery or procurement plan is not today’s mission-capable inventory. A dated, variant-specific U.S. fleet count has not been verified. A separately identified lifetime development total has not been verified. This is not a zero-cost estimate.
What the government budgets and pays for this program, from budget justification books, appropriations, acquisition reports and contract announcements. Each figure states its dollar basis. What contractors were obligated is under Contracts.
Budget Lines
- R-1 PE 0207253F
- FY2026 Aircraft Procurement BA05 line 71
Budget line items recorded for this program.