In a single snapshot, the USS Boise attack submarine has not been on the sea since 2015. That solitary hull has since been a case study of a less publicly known form of submarine risk: submarines do not need to be followed, to be aimed at or to be struck to cease service. They simply need to be stuck.
Industrial capacity, in the form of dry docks, skilled trades, planning bandwidth, and the supply chain that sustains nuclear maintenance has been the immediate bottleneck to the U.S. undersea preparedness. An attack boat is not gathering intelligence, not trailing other submarines, and not training crews at the rate fleet planners would like to see it train when it is in depot availability longer than planned. “Delay days” turn out to be a working reality and no longer a number on a slide.
Companies of oversight have multiplied and multiplied times what already exists in the lives of sailors and maintainers. According to a 2020 GAO audit on carrier and submarine maintenance, the four publicly available shipyards of the Navy completed 38 of 51 availabilities late during a five-year period, which amounted to 7,424 total days of delay; in the case of submarines, the average overrun was 225 days in which a maintenance period was late. Such numbers are significant, since the ports of entry, Norfolk, Portsmouth, Puget Sound, and Pearl Harbor, are the bottlenecks of the most nuclear labor. The fleet does not “catch up” on them where they fall behind.
Such congestion also spills into work where to send decisions. The case with Boise involved the Navy eventually transferring the overhaul into the private sector and contracting Newport News Shipbuilding, whose completion should be completed by September 2029, to commence an engineering overhaul after years of being in limbo. Newport News outlines the scope of the overhaul, which encompasses the structure of the hull, tanks, propulsion, electrical, auxiliary systems, and armament and the changes that the ship will undergo- exactly the type of deep work that cannot be hurried without a price.
But Boise story also reveals one more ugly truth that repair capacity is not equal to new-construction capacity. Previously, navy leaders have criticized that a yard that would be efficient in producing submarines could not restart an elaborate overhaul after a lengthy hiatus, as the skills that are equipment-specific, and the workflow is less predictable. Even Newport News admitted to a “10-year hiatus” in submarine maintenance and said that it needed to restore that business, develop and make the supply chain mature, and invest in facilities before it could stabilize the performance.
The constraint behind any schedule slip is people. Breaking down the wider shipbuilding workforce has indicated an industry that could require 200,000-250,000 new employees in demand jobs in the next 10 years- jobs such as welding, electrical jobs and front-line supervisory jobs. The structural pressures include competition with other trades, high churn, an aging workforce and training pipelines, which do not scale as quickly as they need to. The education side has also become thin and at state maritime academies, enrollment has dropped by an average of 30 to 35 percent in the last 10 years and the federal and state maritime academies only produced 1,100 students in 2025.
That labor shortage comes at the most inappropriate moment to the submarine business since construction and maintenance drains off the same labor resources and manufacturers. The Columbia-type ballistic missile submarine program is one example of how delicate that ecosystem has become: GAO demonstrated that the lead boat would be 12 to 16 months late, and that there has been a continuing problem with materials and design products that have been resistant to mitigation.
The money of modernization is pumped in infrastructure such as the Shipyard Infrastructure Optimization Program of the Navy and specific work is being done in the public yards. Nevertheless, the problem of industrial base is not any one dry dock, or even contract so much as it is throughput: skilled trades, consistent supplier delivery, and planning discipline that can handle such “unknown unknowns” as are found as maintenance commences.
The first cinematic weakness of the undersea fleet is not its direct weakness. It is time-consuming, manufacturing and accruing-days become years as boats lie awaiting space, parts and the individuals eligible to get them back to sea.
