A nuclear supercarrier will not be able to project power when it cannot go out of the shipyard. It is the pressure point around USS John C. Stennis (CVN-74) a Nimitz-class carrier in deep mid-life Refueling and Complex Overhaul (RCOH) at Newport News shipbuilding. Since 2021, the ship has not been operationally tasked and the maintenance turnaround has missed by 14 months, which further adds to an already existing carrier availability gap that makes it more difficult to plan the forces in multiple areas.
RCOH is not a tune-up. At a typical 25-year service window, a carrier is re-opened and refurbished to achieve a 50-year service goal and intrusion is done to propulsion, electrical distribution, combat systems, aviation support spaces, and habitability. The task is habitually tens of millions of labor hours long, the sequencing is merciless: any inspection of the work uncovers corrosion and wear, any finding of a new part must result in respecification or rework, and any late arrival of any part can prevent teams whose work depends on it. As that cycle becomes sluggish, the fleet being operated can easily feel it since few of the 11 carriers in the Fleet can be deployed at any given time.
The Stinnen case did not have a schedule impact that was generated by paperwork only. In initial inspections, maintainers found a serious machine issue: there was a considerable amount of mechanical degradation in one of the eight steam turbine generators of the ship. The generators themselves are at the heart of what the carrier can do to take reactor output and turn it into useful electrical and mechanical power–precisely the type of underlying equipment that can not be postponed to a later opportunity without incurring increasing risk. A decreased electrical margin is not a little nuisance in a modern carrier; it limits ship control, ship cooling, sensors, aviation support equipment and networked combat systems.
The situation in the industry is as significant as the repair of an individual. Throughout the carrier and submarine business, government reporting has reported a backlog of maintenance of 1.8 billion dollars and “significant maintenance intervals” being completed late is now a structural occurrence and not episodic. A Navy-wide trend of ships being shipped with incomplete inventories of parts, one measure of the manner in which pipelines of spare parts, shipyard capacity and shipyard planning assumptions lose track with the constant demand, was also quoted in the same body of work.
Manpower is a second limiter. The large-deck carrier overhauls need welders, electricians, pipefitters, planners, inspectors, and test crews that cannot be easily surged, especially in cases where more than one capital ship is looking to use the same employees and access to the dry dock. Newport News is right in the heart of such competition, where it is involved in the construction of carriers, as well as in a deep maintenance, and schedule slippage in one hull can spill over to the next availability window.
The working aspect of the equation is already overstretched. USS Gerald R. Ford had been deployed longer than eight months and as of Feb. 20 had deployed 241 days. Long distance at sea puts a strain on the engineering plant cycles, aviation maintenance, and the crew tempo and puts a strain on the sequencing of follow-on strike groups, whose training and maintenance schedules were constructed around a more predictable rotation model.
Simultaneously, the latest carriers of the Navy also have their share of the sustainment complexity. Ships of the Ford-class were built with more modern electrical and electromagnetic systems, with Advanced Arresting Gear, whereby the system also relies on software controlled absorption of energy and turbines in the water instead of the old hydraulic system. It has been reported in public tests that AAG reliability has not reached the necessary standards, and the necessity to provide specialized assistance and spare parts may be a burden in case the aim is to increase the tempo of flight missions.
Stennis is an alert that preparation is becoming more and more determined in factory facilities that hardly feature on the front page: in dry docks, test cells, parts shops and apprenticeship pipelines to skilled trades. The global presence model of carrier force presupposes the stability of returns to service. Once the degradation of one generator is a schedule-critical maintenance within an already capacity-constrained shipyard system, the outcome is not merely a late ship, it is more “math” involving carrier tightening on each fleet manager of each fleet that relies on that ship to leave the blocks.
