In a ship fleet designed to go fast, go far, and go endure, the most difficult job that must be sometimes just to get back to sea. With the nuclear-powered aircraft carriers of the U.S. Navy, fuel at sea is not the most disruptive choke point, it is the once per service life industrial event that transforms a 100,000-ton capital ship into a several years long shipyard overhaul project. The Refueling and Complex Overhaul (RCOH) is the midlife re Boot camp that puts a carrier into its second act, and it is a readiness vulnerability since the United States practically relies on a single location to perform it: Newport News Shipbuilding.
The nuclear plant is the starting point of RCOH and that will give the pace to the rest. The reactors are lowered, switched off and left to cool down to allow work to resume safely. To get inside, it is necessary to cut large openings and use specialized cranes to lift heavy reactor components and take out and put in fuel assemblies under stringent radiological surveillance. Such an evolution is designed to be sluggish, but it is also the tip of the iceberg: once the ship has been cracked open and the plant has shut its doors, maintainers are no longer limited to inaccessible spaces and systems in the regular operating cycle of the carrier. What appears externally as “refueling” is also a one shot effort on the part of the Navy to rewire, re-plumb, rebuild and modernise deep infrastructure without attempting to do the operation with a keyhole.
The magnitude of the scale is hard to be exaggerated. In describing the work undertaken when the Navy celebrated the completion of USS George Washington into RCOH after 69 months, the service identified it as a package that covered almost all parts of the ship, and found every member of the planning team and the force of the ship without exception. The secret engineering truth is that RCOH is a refueling operation that turns into a shipwide rebuild.
The same fact underlines why schedule slip is strategically loud. When the yard is doing RCOH with just a yard, the delays are accumulated down the class until the ships put in line to receive a dry dock, trained labor and long-lead parts. The central point of attraction has been the fact that nuclear carrier is capable of operating over 20 years without needing to refuel the reactor, however, when the time to pay the bill is computed, the payment is in years, not weeks.
Carrier maintenance capacity has long been a constraint to national planning even outside of RCOH. A 2011 GAO examination of carrier maintenance industrial base capacity subdivided depot work into propulsion-plant work, which is mainly accomplished by public shipyard workforce, and “nonpropulsion” work which is capable of being done at scale by private yards all tanks, valves, pumps, piping and corrosion control as well as flight deck systems. The importance of that division is that it highlights what can be decentralized and that which is intractably specialized.
The Ford class gives it a twist. The design of its A1B reactors is to produce much higher amounts of electrical power, which were used to drive other systems, including EMALS catapults and advanced arresting gear, which were meant to increase sortie generation and wear reduction. The design around the capability to combine extensive modernization packages throughout a 50-year life, the need to refuel the ship in the middle of the life still roots the concept of long-term maintenance, even to platforms that, in fact, may be still relevant long after the middle of the century.
Ultimately, the juxtaposition which remains is not a yearning back to another time of ship repair, but a current reality that nuclear propulsion is a daily trade off of logistics where rare and industrial scale maintenance is concerned. The greatest pole in the tent, as far as a carrier force is in question, which is likely to be continuously available, is that evolution which cannot be rushed, cannot be improvised, and cannot now be meaningfully diversified.
