Event 2026-08-27· PASS· risk moderate

Navy still pays billions to crew attack subs that cannot dive, after promising in 2018 to clear idle time by FY 2023 and setting an 80 percent 2027 readiness target

GAO’s August 27, 2026 public report finds more than 15,000 lost operational days and $3.4 billion in operating-and-support costs on delayed or idle active attack submarines over FY 2016–2025, with public shipyards finishing depot work on time only about 11 percent of the time — against CNO Navigation Plan 2024’s 80 percent combat-surge-ready goal by 2027 and the FY 2026 budget’s stated case for on-time Virginia deliveries, in-service maintenance, and AUKUS.

Navy still pays billions to crew attack subs that cannot dive, after promising in 2018 to clear idle time by FY 2023 and setting an 80 percent 2027 readiness target

GAO’s August 27, 2026 public report finds more than 15,000 lost operational days and $3.4 billion in operating-and-support costs on delayed or idle active attack submarines over FY 2016–2025, with public shipyards finishing depot work on time only about 11 percent of the time — against CNO Navigation Plan 2024’s 80 percent combat-surge-ready goal by 2027 and the FY 2026 budget’s stated case for on-time Virginia deliveries, in-service maintenance, and AUKUS.

Log entry. Event date 2026-08-27. Instruments: GAO-26-109256 (public); GAO-26-108888 testimony; CNO Navigation Plan 2024; Department of the Navy FY 2026 Budget Highlights. Institutions: U.S. Navy; Naval Sea Systems Command; House Committee on Armed Services; Government Accountability Office.

This is a maintenance-and-money story. It is not a crime story. It adds no operational detail beyond the public report.

On August 27, 2026, GAO issued the unclassified cut of a review asked for in House Report 118-529. The classified parent is dated July 16, 2026. What was cut is the point: whether the Navy meets its 2027 readiness target, and how its force-generation model compares with strategic competitors, are classified. This desk does not invent either. What the public text does say is that, over FY 2016–2025, the Navy lost more than 15,000 operational days to maintenance delays and idle time on active attack submarines and spent an estimated $3.4 billion in operating-and-support costs on boats that, in GAO’s words, “provided no operational capability.” Public yards finished that depot work on time about 11 percent of the time. Those are findings about an opened report, not a verdict on any sailor.

The stated case

The Navy’s strongest fair explanation, from the same record, is that the active-idle peak is already behind it, the 2018 recommendations were implemented, and the live problem is a coming Los Angeles-class inactivation wave the service has begun — not finished — to plan around.

GAO-26-109256 says the Navy agreed with four 2018 recommendations and implemented all four, including a December 2018 report to Congress on attack-submarine depot maintenance. This desk did not open that report or the earlier GAO-19-229 PDF; both appear only as GAO-26-109256 characterizes them. On that characterization, the 2018 plan covered public-yard hiring, training, and some depot work at private yards, and the Navy assessed those steps would eliminate idle time and the attack-submarine maintenance backlog by the end of FY 2023. Active idle did fall — 1,518 days in FY 2022 to 166 days in FY 2025. That drop is part of the government’s case, not a footnote against it.

NAVPLAN 2024, opened from the February 19, 2025 Wayback capture after the live navy.mil PDF failed from this environment, says the Navy will get platforms “in and out of maintenance on time” and, by 2027, “achieve and sustain an 80 percent combat surge ready posture for ships, submarines, and aircraft.” The FY 2026 Highlights PDF funds the Submarine Industrial Base — including Virginia-class shipbuilder wages — as necessary for “on time delivery of Virginia Class Submarines, maintenance of in service submarines, and national commitments made under the AUKUS agreement.” The same book lists “Ready the force by eliminating ship, submarine, and aircraft maintenance delays,” and records that the Department “is reviewing AUKUS” for alignment with an “America First agenda.”

Officials told GAO they have looked at pier-side defueling, reduced crewing, and service-life extensions, and that they are using USS Pasadena as a trainer while it waits. In April 2026 the Navy verbally concurred with the two public recommendations. That is the fair case.

What the record shows

2018, as characterized by GAO-26-109256 only. GAO-19-229 (November 19, 2018) found the Navy unable to begin or complete the vast majority of attack-submarine maintenance periods on time. Four recommendations; the Navy agreed and later implemented them. A December 28, 2018 Secretary of the Navy report to Congress, according to GAO-26-109256, assessed that idle time and the backlog would be gone by the end of FY 2023. Those two PDFs were not opened here.

September 2024 (NAVPLAN archive). Admiral Lisa M. Franchetti: “By 2027, we will achieve and sustain an 80 percent combat surge ready posture for ships, submarines, and aircraft.”

March 4, 2026 (GAO-26-108888 HTML). Senate Armed Services Subcommittee on Readiness testimony. Preliminary idle-time series match the later report, including the 1,518 → 166 active-idle drop and a preliminary $4.2 billion operating-and-support estimate. A dedicated report was promised for summer 2026.

FY 2016–2025 (GAO-26-109256). Fleet as of FY 2025: 44 attack submarines (20 Los Angeles-class, 24 Virginia-class); Seawolf excluded “unless otherwise noted.” Depot delay 3,040 days then 3,454 days across the two five-year blocks; public yards on time about 11 percent. Active idle 8,906 days; inactive idle 3,287. Table 1 (CY 2025 dollars) totals $4.17 billion over 18,687 days — about $3.4 billion for delay plus active idle, $722 million for inactive idle. Highlights use “more than 15,000” days and “$3.4 billion” for the active slice. That is not the same pile as the table total.

Virginia class. One-per-year pace as of June 2025, “half the rate of the Navy’s two per year goal.” Both 2025 deliveries “over 3 years late.” GAO cites late supplier material and scarce experienced labor, and notes planned industrial-base spending, pointing to a 2026 weapons-systems assessment this desk did not open.

USS Pasadena (public sidebar). Inactive idle January 1, 2025; not expected at Norfolk Naval Shipyard until November 15, 2028 (1,414 days). Dive certification expired; still fully crewed. GAO: over $300 million in operating-and-support costs.

January 2026 projection. Without mitigation, 15 more boats enter inactive idle FY 2026–2030 — more than 14,000 days and $3.1 billion. Named drivers: an aging Los Angeles class and seismic constraints at Puget Sound. Options on the record: officials called pier-side defueling not cost-effective for Los Angeles-class boats and produced no detailed analyses GAO could see; the Alternate Inactivation Construct had been used on two of 18 Los Angeles-class boats identified for decommissioning from 2014 through 2025; service-life extensions for two boats were projected to cut 1,715 idle days in FY 2026–2029, still pending approval.

August 27, 2026. Two recommendations: evaluate alternative decommissioning options (including defueling outside dry docks and reduced crewing); then write an inactivation plan with steps and time frames. Verbal concurrence; no written comments.

The contradiction

They said, as GAO recounts the December 2018 report: idle time and the backlog would be gone by the end of FY 2023.

They said, in NAVPLAN 2024: get platforms through maintenance on time, and by 2027 “achieve and sustain an 80 percent combat surge ready posture.”

GAO’s letter restates that plan as “80 percent operational availability for attack submarines by 2027.” Those are not the same words. This log records both. It does not collapse them, and it does not score the 2027 target. Attainment is classified.

They said, in the opened FY 2026 Highlights PDF: industrial-base money is needed for on-time Virginia deliveries, in-service submarine maintenance, and AUKUS.

The record shows public yards at about 11 percent on time; Virginia at one a year as of June 2025, both 2025 boats more than three years late; and a projected inactive-idle wave of more than 14,000 days and $3.1 billion through FY 2030 if unmitigated. Active idle did fall. The backlog, on GAO’s telling, did not clear on the 2023 clock. A full crew on a boat that cannot dive is not a hidden line. It is the report’s definition of the bill.

This compares words to instruments. It is not a finding that anyone committed a crime or defied a statute.

What we know / What we do not know

Verified fact. The public report’s active-day and $3.4 billion figures, ~11 percent on-time rate, Virginia pace and late 2025 deliveries, active-idle drop, Pasadena dates and more-than-$300-million figure, and the 15-boat projection exist as retrieved. NAVPLAN says “80 percent combat surge ready”; GAO says “80 percent operational availability.” Verbal concurrence; no written comments.

Attributed characterization. The 2018 “gone by FY 2023” line is GAO-26-109256’s account of a SECNAV report this desk did not open.

Analysis. The fair remainder is real: active idle collapsed; the 2018 recommendations were implemented; FY 2026 still budgets industrial-base money. The remaining public ledger is on-time depot work, late Virginias, and inactive idle.

Unresolved question. Is the Navy on track for 2027, under either phrasing? Classified.

Not retrieved. The July 16 classified report; GAO-19-229 as a PDF; the December 2018 SECNAV depot report; GAO-26-108457. No patrol rates or classified availability figures are used.

Evidence ledger

1. WH4-C01 (verified fact). More than 15,000 lost operational days and $3.4 billion O&S on delayed or idle active attack submarines, FY 2016–2025. Table 1’s $4.17 billion includes $722 million inactive idle. Source: GAO-26-109256 HTML.
2. WH4-C02 (verified fact). Public yards about 11 percent on time, FY 2016–2025. Source: same.
3. WH4-C03 (verified fact). Virginia one-per-year as of June 2025; both 2025 deliveries over three years late. Source: same.
4. WH4-C04 (verified fact). Active idle 1,518 days (FY 2022) → 166 days (FY 2025). Sources: GAO-26-109256; GAO-26-108888.
5. WH4-C05 (verified fact). Without mitigation, 15 boats, more than 14,000 inactive-idle days, $3.1 billion, FY 2026–2030. Source: GAO-26-109256.
6. WH4-C06 (verified fact). NAVPLAN: “80 percent combat surge ready.” GAO paraphrase: “80 percent operational availability.” Sources: NAVPLAN archive; GAO-26-109256.
7. WH4-C07 (verified fact). Pasadena inactive idle January 1, 2025; Norfolk not expected until November 15, 2028; crewed; GAO more than $300 million. Source: GAO-26-109256.
8. WH4-C08 (verified fact). Verbal concurrence; no written comments. Source: GAO-26-109256.
9. WH4-C09 (attributed characterization). As characterized by GAO-26-109256, the December 2018 SECNAV report assessed idle time and the backlog would be eliminated by the end of FY 2023. Those 2018 PDFs were not opened.
10. WH4-C10 (unresolved question). 2027 attainment is classified. Not a finding.

The Highlights industrial-base sentence is an opened-PDF statement of the budget’s case, not a performance score. No page number is cited.

Response from subjects

GAO-26-109256 is the on-record audit. The Navy’s reply in that document is verbal concurrence and technical comments; no written agency comments are printed. NAVPLAN 2024 and the FY 2026 Highlights PDF are the Navy’s own strategy and budget case. No individual right-of-reply was sought. These are institutional instruments, not personal allegations.

Methodology note and update history

Lead claims are limited to documents opened here: the GAO-26-109256 product page and HTML report, the GAO-26-108888 testimony HTML, NAVPLAN 2024 via the listed Wayback capture after the live navy.mil URL failed, and the FY 2026 Highlights PDF. Fact-check identifier: fc-2026-08-30-open-source. First published 2026-08-30. Moderate-risk entry: public audit of readiness costs; no classified figures; no crime claim. Update history: initial publication.

Conclusion

The 2018 clock, as GAO recounts it, said idle time and the backlog would be gone by the end of FY 2023. Active idle is down. Public-yard on-time performance, late Virginias, and a projected inactive-idle wave remain on the public ledger, against a 2027 target the Navy wrote as “combat surge ready” and GAO restated as “operational availability.” Whether that target is met is classified. The fair test is whether the inactivation plan GAO asked for appears in writing — and whether the next public numbers move the 11 percent and the one-a-year pace, not the adjectives around them.