The Navy can maintain a 12-carrier force for less cost than that projected in the Bottom-Up Review (BUR) and the Navy's Recapitalization Plan by using one of several options that consider cost and employment levels. The least expensive investment option that also maintains employment levels at or above minimum levels authorizes building the CVN-76 in fiscal year 1995 and then transitions to a conventional carrier construction program. This option costs approximately 25 percent less than the BUR and the Navy's Recapitalization Plan options. Building CVN-76 in fiscal year 1995, as proposed by the BUR, the Navy's Recapitalization Plan, and other options in our report (see table 1.1), stops the downward trend in Newport News Shipbuilding employment at about the minimum sustaining level of 10,000 employees. Options to delay building the carrier result in a continuing decline to about 7,500 employees. However, in the long term the employment levels in the BUR and the Navy's Recapitalization Plan also fall below 10,000 employees. In addition, options that include building CVN-76 in fiscal year 1995 require building carriers sooner than they are needed for force structure purposes and therefore incur expenses sooner than necessary. Moreover, the option to build nuclear carriers at the historical rate of one every 3 years maintains stable employment levels but costs about 40 percent more than options in the BUR and the Navy's Recapitalization Plan. Options for using carriers for their full service lives (options 1A and 1B) are less expensive than those in the BUR and the Navy's Recapitalization Plan, especially if the force transitions to a conventional carrier construction program. However, in the near term, the employment levels fall below the Navy's estimated critical minimum sustaining level of 10,000 employees. Since affordability of the future force is an important concern, a transition to constructing conventionally powered carriers would save the largest amount of investment resources (see table 1.1). A conventional carrier force structure would require less budget authority funding and fewer outlays than any force structure that continues to require building nuclear aircraft carriers. Costs are lower because all major cost elements--procurement, midlife modernization, and inactivation costs--are lower for a conventional carrier than for a nuclear carrier. Throughout the 1960s and most of the 1970s, the Navy pursued a goal of creating a fleet of nuclear carrier task forces. The centerpiece of these task forces, the nuclear-powered aircraft carrier, would be escorted by nuclear-powered surface combatants and nuclear-powered submarines. In deciding to build nuclear-powered surface combatants, the Navy believed that the greatest benefit would be achieved when all the combatant ships in the task force were nuclear powered. Nonetheless, the Navy procured the last nuclear-powered surface combatant in 1975 because this vessel was so expensive. More recently, relatively new and highly capable nuclear-powered surface combatants have been decommissioned because of the affordability problems facing the Navy. Affordability is an important, but not the only, criterion when comparing nuclear and conventional carriers. Important factors also include operational effectiveness, potential utilization, and other intangibles. Flexibility of operations, such as the ability to steam at high speeds for unlimited distances without refueling; increased capacity for aviation fuel; increased capacity for other consumables, such as munitions; and the higher speeds of the advanced nuclear carrier over conventional carriers are some of the factors that need to be considered when evaluating nuclear- and conventionally powered carriers. Other considerations include the availability and location of homeports and nuclear-capable shipyards for maintenance and repairs and other supporting infrastructure, such as for training; the effect of out-of-homeport maintenance on the amount of time personnel are away from their homeport; and the disposal of nuclear materials and radioactively contaminated materials. These issues and others will be addressed in our upcoming review on the cost-effectiveness of conventional versus nuclear carriers and submarines as mandated by the congressional conferees on the Defense Appropriations Act for 1994. Department of Defense (DOD) officials partially concurred with the results of our report. DOD agreed that affordability is an important, but not the only, criterion when comparing nuclear and conventional carriers. DOD stated that other factors, including operational effectiveness and potential utilization, need to be considered when comparing nuclear and conventional carriers. We agree, and these issues will be examined as part of our upcoming review of the cost-effectiveness of conventional versus nuclear carriers and submarines. DOD noted that we did not examine the impact of alternative investment strategies on the Newport News Shipbuilding nuclear carrier industrial base, nuclear construction skills and vendors, or the need to preserve the base. We noted those limitations to the report's scope in our draft. Our report does reflect the employment levels resulting from the investment options, and the Navy's comments on the likely effects of those employment curves are in our report. DOD also noted that our report compares only the investment-related cost of a nuclear-powered carrier with that of a conventionally powered carrier and not the operating and support component of total life-cycle costs, including the fuel cost. DOD stated that the potential requirement to build additional logistics support ships must be considered in the decision to build and operate a conventionally powered carrier force. As we noted in the draft report, our analysis focused on the investment-related costs of alternative procurement profile strategies. Although outside the scope of this review, we have estimated the operating and support costs of a nuclear carrier and a conventional carrier of the general type used in our investment analysis (see table 1.2). The annualized life-cycle cost of a modern fleet oiler is about $19.6 million. A recent Center for Naval Analyses study suggests that the conventional carrier's incremental support requirements would be less than one fleet oiler per carrier. We have not verified this data. Our upcoming review will examine in greater detail the life-cycle costs of nuclear and conventional carriers, considering the incremental fuel-driven demand of conventional carriers for additional logistics support ships. The objective of the BUR strategy is to maintain a 12-carrier force, maintain the industrial base at NNS, avoid cost increases associated with a delay in construction, and preserve carrier force size flexibility. Under the BUR, the Navy would purchase CVN-76 in fiscal year 1995 consistent with a sustaining rate strategy but would shift to a replacement rate strategy beginning with CVN-77. The Navy's Recapitalization Plan transfers resources from the Navy's infrastructure and savings from a smaller fleet to fund the Navy's protected major procurement accounts, including the carrier program, in order to maintain the BUR force structure and/or critical industrial capabilities. Under the Navy's recapitalization strategy, the Navy would buy CVN-76 in fiscal year 1995 but would defer CVN-77 until fiscal year 2002 and then shift to a sustaining rate strategy of one carrier every 4 years. The BUR and the Navy's Recapitalization Plan were analyzed to determine the effects of their strategies on the carrier force structure, financial investment requirements, and the Newport News Shipbuilding total employment level. In addition, we analyzed eight alternatives for structuring a 12-carrier force to achieve one of the following objectives: 1. Maximize budgetary savings through a carrier replacement rate strategy. This approach maximizes the carriers' useful service lives and builds new carriers when actually needed to sustain force levels. (See the analysis and discussion of alternatives 1A and 1B.) 2. Maximize the stability of Newport News Shipbuilding (NNS) employment through a sustained rate construction and refueling/complex overhaul program. This approach requires forgoing useful service life by accelerating inactivations to maintain a sustained rate production program. (See the analysis and discussion of alternatives 2A and 2B.) 3. Optimize budgetary savings and employment level stability. This approach optimizes the service lives of nuclear carriers and provides a stable employment base. (See the analysis and discussion of alternative 3.) 4. Delay building the new carrier to defer near-term outlays and reduce overall carrier program costs. The new starts for a nuclear carrier force were planned for fiscal years 1998 and 2000 and fiscal year 2002 for a conventional carrier force. (See the analysis and discussion of alternatives 4A, 4B, and 4C.) The following discusses our analyses of DOD's and the Navy's baseline force structure plans and the options we developed based on the four planning objectives and force structure investment strategies. We analyzed each option's impact on force structure and the trade-offs between budgetary requirements and overall employment levels at NNS. Under the BUR's baseline force structure option to support a 12-carrier force (i.e., 11 active carriers and 1 operational reserve/training carrier), CVN-76 is funded in fiscal year 1995, necessitating the early retirement of the U.S.S. Kitty Hawk (CV-63). After CVN-76 the Navy plans to procure new carriers when needed to maintain force levels. This approach results in fluctuating intervals of 2 to 7 years for the construction of new carriers, but maximizes the notional 50-year service life of current and planned nuclear-powered carriers. To sustain their full 50-year service life, nuclear carriers will be refueled after approximately 23 years of service. (See fig 2.1.) Figure 2.2 shows that this option halts the rapid decline in employment at NNS at just above the 10,000-employee level-- the minimum level needed to sustain the shipyard's viability, according to the Navy. If scheduled CVN construction is delayed, the Navy stated it would, at a minimum, have to expand the number of regular overhauls at NNS and take action to preserve the nuclear component and shipbuilding industrial base. The BUR option provides a near-term solution to the employment level decline, although it may be difficult for the shipyard to economically administer the drastic shifts in the employment levels at the yard between fiscal years 1998 and 2033. Substantial declines in employment at NNS are projected to bottom out in fiscal years 1998, 2004, 2014, 2024, and 2033. The drastic decline beginning in fiscal year 2010 reduces the workforce by about 13,000, dropping total employment below the minimum level. Although DOD believes that this option is cost-effective, it totals over $4.2 billion in the short term (fiscal years 1995-99), and its cost over the long term (fiscal years 1995-2035) totals more than $56 billion. Only one option, which reduces the service life of nuclear carriers to 37 years, has larger outlays than the BUR baseline force model (see discussion of alternative 2A). The Navy's Recapitalization Plan was developed to fulfill the requirements of the BUR. This plan calls for funding CVN-76 in fiscal year 1995 and building new nuclear carriers in 4-year intervals beginning in fiscal year 2002, as shown in figure 2.3. The plan requires that some assets be retired early to buy newer equipment. The U.S.S. Kitty Hawk (CV-63) will be retired 3 years before the end of its projected service life to maintain the 12-carrier force level when CVN-76 enters the fleet. To sustain the 4-year build interval, five other carriers will be retired early: the U.S.S. Enterprise (CVN-65) will be inactivated 2 years early, the U.S.S. Dwight D. Eisenhower (CVN-69) and the U.S.S. Carl Vinson (CVN-70) will be retired 3 years before the end of their projected service lives, and the U.S.S. Nimitz (CVN-68) and the U.S.S. Theodore Roosevelt (CVN-71) will be decommissioned 4 years early. The Navy will prematurely incur large inactivation costs, currently estimated at almost $1 billion each, for the early inactivations of these Nimitz-class carriers. The plan maintains approximately the same employment level at NNS as the BUR baseline force structure option through fiscal year 2001 (see fig. 2.4). Between fiscal years 2010 and 2034, the plan maintains an average total employment level above the projected level for the BUR option. Except for declines in total employment in fiscal years 2003-5, 2017-18, and 2029-31, this option maintains shipyard employment between 15,000 and 23,000 after fiscal year 2001 due to the consistent 4-year construction interval. Although the outlays are slightly lower than those in the BUR option in the near term (1995-99) due to a 1-year delay in CVN-77, the outlays for the mid-term (fiscal years 1995-2015) and long term (fiscal years 1995-2035) are higher than those in the BUR option due to the consistent 4-year new construction interval and the additional premature inactivations of Nimitz-class carriers. Total outlays for fiscal years 1995-2035 total almost $59 billion, about $2.5 billion higher than the cost in the BUR option. Using this force structure option, the Navy builds a new carrier only to replace a carrier that has to be inactivated at the end of its service life (see fig. 2.5). The U.S.S. Independence (CV-62) is the last carrier to be decommissioned before the end of its service life to maintain a 12-carrier force level when the U.S.S. United States (CVN-75) enters the force. All Nimitz-class carriers will use their entire projected 50-year service lives, which will require that each receive a nuclear refueling complex overhaul at 23 years. This option's construction schedule leads to a variable build interval; construction starts may be anywhere from 3 to 10 years apart. Construction for CVN-76 begins in fiscal year 1999, and the ship will replace the U.S.S. Kitty Hawk (CV-63) in fiscal year 2006. Figures 2.5 and 2.6 show that although the Navy receives the full value of its carrier force investment, workforce management is complicated by several short-term surges in total employment and then large drop-offs because of the varying build intervals. Those changes in employment levels are similar to those in the BUR baseline force option, although the drop-off between fiscal years 1996 and 2000 under this option is much more drastic, with the employment level falling below 10,000. The workload gap could be filled by having the government direct other work to the shipyard or reschedule delivery of work under contract. Employment at the shipyard improves under this option in the mid- and long terms. Between fiscal years 2001 and 2015, the total employment level at NNS is generally at a higher level than in the BUR option. After fiscal year 2020, this option's total employee level has fewer major shifts over the remaining 15 years of the period we analyzed than the BUR option. Since new ship construction and inactivations occur only when needed under this option, money is not outlaid prematurely for procurement and major investment costs. Outlays are less than half of those incurred under the BUR option for fiscal years 1995-99 but are only $161 million less than those between fiscal years 1995 and 2035 because, in the long term, the BUR maintains a similar replacement rate new carrier construction strategy. Outlays for this option in the long term are higher then those in the options delaying CVN-76's construction start to fiscal years 1998 and 2000; however, in the near term, this option requires over $530 million less outlays than the option that builds CVN-76 in fiscal year 1998 due to the additional 1-year delay in CVN-76's construction start. The government will receive the full value of its investment in aircraft carriers under this option because both conventional and nuclear carriers will remain in the active fleet until the end of their expected service lives (see fig. 2.7). Nimitz-class nuclear carriers receive nuclear refuelings and complex overhauls after 23 years and are inactivated at the end of their 50-year service lives. Conventional carriers remain active for 45 years, entering the service life extension program after 30 years of service. After fiscal year 1994, only the U.S.S. Independence (CV-62) is inactivated before the end of its projected service life so that the U.S.S. United States (CVN-75) can be commissioned into the fleet in fiscal year 1998. This early inactivation will allow the Navy to maintain the 12-carrier force level, and carriers will only be built to replace others. The next carrier, CVA-76, is programmed to begin construction in fiscal year 2000 at NNS, and new construction start intervals would fluctuate between 3 and 10 years, similar to the BUR baseline force structure option. Figure 2.8 shows that this fluctuating new construction start rate results in a total employee level profile similar to that in the BUR option. During the near-term period of fiscal years 1995-99, the employment level under this option ranges from 7,500 to 10,000 compared with 11,000 and 15,000 under the BUR option. The decrease in the employment level could be mitigated by other shipyard work being directed by the government to NNS or by bidding for projects in the commercial shipbuilding market, such as liquified natural gas tankers or cruise ships. Since this option requires new ship construction and decommissioning only when needed, major procurement and investment costs are not incurred prematurely. Therefore, this option has the lowest value of outlays in the long term. Outlays for this option are over $2 billion less between fiscal years 1995 and 2015 and $6.5 billion less between fiscal years 1995 and 2035 than the option that transitions to conventional carrier construction with CVA-77. Also, this option's outlays are approximately one-third less than those for the BUR baseline force structure option for fiscal years 1995-2015 and approximately 37 percent less than those between fiscal years 1995 and 2035. This option emphasizes maximizing the stability of NNS' employment level through a sustained rate of new carrier construction, regardless of cost (see fig. 2.9). New nuclear carrier construction starts begin in fiscal year 1995 at a historical rate of every 3 years. All nuclear carriers receive their nuclear refuelings and complex overhauls but are retired early, after approximately 37 years. Conventional carriers in the fleet, the U.S.S. Independence (CV-62), the U.S.S. Kitty Hawk (CV-63), and the U.S.S. Constellation (CV-64), are retired before the end of their expected service lives as well. The benefit of this option is that NNS could sustain a workforce averaging over 20,000 employees with very few shifts in the overall employment level (see fig. 2.10). Employment levels remain above those under the BUR option throughout the 1995 to 2035 time frame. Constructing new nuclear carriers every 3 years is extremely expensive, and the outlays are significantly greater than those in the BUR baseline force structure option in the near term (fiscal years 1995-99), mid-term (fiscal years 1995-2015), and long term (fiscal years 1995-2035). This option requires more outlays because maintaining a 12-carrier force level at this construction rate requires the Navy to retire all of its carriers early, most with 25 percent of their service life remaining. Therefore, the Navy will need to fund costly nuclear carrier inactivations prematurely. This option procures 14 carriers between fiscal years 1995 and 2035, compared with 10 carriers under the BUR plan. This investment strategy represents the long-term investment implications of building carriers at historical rates to protect the carrier shipbuilding industrial base and employee levels. To support a sustained-rate construction program, the Navy would need to inactivate eight Nimitz-class nuclear carriers prematurely with 20 percent of their useful service life remaining. The new conventional carrier construction start is programmed for fiscal year 2000, and the follow-on conventional carriers have construction starts every 3 years. (See fig. 2.11.) No nuclear carriers are built after the completion of the U.S.S. United States (CVN-75). The nuclear capabilities at NNS would be sustained through a series of nuclear refuelings and complex overhauls of the Nimitz-class carriers through fiscal year 2024, some or all of the decommissioning work of the nuclear carrier fleet, and other nuclear repair and maintenance work. None of the remaining conventionally powered carriers would be decommissioned early except for the U.S.S. Independence (CV-62) to maintain a 12-carrier force when the U.S.S. United States (CVN-75) is brought into service in fiscal year 1998. NNS will have a severe drop-off in its workload between fiscal years 1996 and 2000 (see fig. 2.12) unless other work is directed to the shipyard. Consolidating all Atlantic Coast-based nuclear shipbuilding and overhaul work at NNS would help maintain nuclear capabilities and help mitigate the severe drop-off in the workload. Between fiscal years 2000 and 2014, the employment level at the shipyard averages about 17,500 employees, and between fiscal years 2015 and 2025 the employment level averages about 22,000 employees. In fiscal year 2026, the shipyard's workforce level drops below 15,000 employees and does not return to the 15,000-employee level until fiscal year 2027. Due to the frequent new construction starts and the earlier decommissioning of the Nimitz-class nuclear carriers, this option costs approximately $8 billion more in the long term (fiscal years 1995-2035) than the conventional replacement rate strategy. During the near-term period (fiscal years 1995-99) this option still costs less than the conventional carrier option that builds CVA-77 in fiscal year 2002 because this option delays the new construction start and cancels the construction of CVN-76. Maximizing the NNS employment levels through a high-production rate is a very costly approach to maintaining a carrier force level in the long term, and the value of the total outlays is higher during this period than in any other conventional option. However, this option is still $11.5 billion less than the BUR option over the long term. This option is consistent with DOD's plan to request funding for CVN-76 in fiscal year 1995. The next ship, however, would be a new design conventional carrier as shown in figure 2.13. The BUR report recommended the deferment of the advance procurement funding beyond fiscal year 1999 for the carrier after CVN-76 pending the completion of an evaluation of alternative aircraft carrier concepts for the next century, including the conventional carrier force option. Under this option, the construction start for CVA-77 is in fiscal year 2002. New starts for follow-on conventional ships are at 4-year intervals, which would support a sustained rate production program at NNS. The employment level under this option is projected to have fewer extreme increases and drop-offs than in the BUR plan. Nuclear carriers currently in the fleet will have 45- to 48-year service lives, requiring all of them to undergo nuclear refuelings and complex overhauls. Both the U.S.S. Independence (CV-62) and the U.S.S. Kitty Hawk (CV-63) will be inactivated 6 and 3 years, respectively, before the end of their estimated service lives. The plan requires that the U.S.S. John F. Kennedy (CV-67) remain in the active fleet 5 years longer than currently planned.This longer service life may be feasible for the ship in its new role as the reserve/training carrier because it will have a reduced tempo of operations, resulting in a reduced amount of "wear and tear." This option maintains the workforce at NNS above the 10,000-employee level throughout fiscal years 1995-2035. The shipyard maintains a very stable employment level after fiscal year 2006--the workforce fluctuates between approximately 15,000 and 20,000 employees in fiscal years 2006-7, with only one significant drop in employment in fiscal year 2015. After fiscal year 2027, the employment level ranges between 11,900 and 16,500. (See fig. 2.14.) Since this option requires building CVN-76 in fiscal year 1995, the near term outlays are similar to those in the BUR baseline option. However, in the mid-term (fiscal years 1995-2015) and long term (fiscal years 1995-2035), the outlays are approximately 25 percent less than those in the BUR option. These savings could help reduce the Navy's Recapitalization Plan projected annual funding shortfall of $3.5 billion in fiscal years 1999 and beyond. If the construction start for the next nuclear carrier--CVN-76--is delayed 3 years to fiscal year 1998, the Navy could maintain a 12-carrier force and maximize the service lives of its nuclear carriers. (See fig. 2.15.) All nuclear carriers will be refueled and overhauled, extending each carrier's service life over 23 years to its full 50-year service life. This option creates fewer drastic shifts in the overall employment level than the BUR option because it has a new carrier construction start rate of every 4 to 5 years compared with the BUR rate of 3 to 7 years. Two conventional carriers, the U.S.S. Kitty Hawk (CV-63) and the U.S.S. Constellation (CV-64), are retained in the active fleet for several years longer than projected in the BUR option and are inactivated closer to or at the end of their projected useful lives. This alternative also retains the U.S.S. John F. Kennedy (CV-67) in the fleet 7 years past the BUR option's plan. This ship, in its new role as the reserve/training carrier, will have a reduced tempo of operations and thus a reduced amount of wear and tear. Other carriers are replaced when required to meet force structure needs. Under this option, NNS' employment level drops to around 7,500 employees and remains below the critical 10,000-employee level for about 3 years. As shown in figure 2.16, overall employment is more stable during fiscal years 2005 through 2034 than under the BUR option. Increased stability in shipyard employment requires fewer adjustments to the workforce over time. Compared to the BUR option, this option's employment troughs are significantly smaller in fiscal years 2004, 2018, and 2025-26. The Navy could mitigate the employment decline in fiscal year 1998 by redirecting other shipbuilding and maintenance work to the yard, or, as the BUR suggested, by rescheduling the delivery of carriers under contract, overhauls, and other work. DOD's financial investment requirement for this option is less than in the BUR option for the near term (fiscal years 1995-99), mid-term (fiscal years 1995-2015), and long term (fiscal years 1995-2035). The difference in outlays from fiscal years 1995 to 1999 for this option are approximately $1.6 billion less than the BUR option. Under this option, the Navy generally retains each nuclear carrier to the end of its useful 50-year service life and therefore will need to refuel each nuclear carrier after 23 years (see fig. 2.17). Two conventional carriers, the U.S.S. Kitty Hawk (CV-63) and U.S.S. Constellation (CV-64), are retained in the active fleet to the end of their expected service lives. Also, the U.S.S. John F. Kennedy (CV-67) will remain in the active fleet for a total of 50 years, 7 years longer than projected in the BUR option. This should be feasible, since the carrier will have a reduced tempo of operations as the reserve/training carrier. Only two nuclear carriers are retired before the end of their useful service lives--the U.S.S. Enterprise (CVN-65) 1 year early and the U.S.S. Nimitz (CVN-68) 2 years early. In addition, this option builds new carriers to replace carriers that are at the end of their service lives, which will lead to a stable new construction start rate every 4 to 5 years. DOD considered delaying the construction of CVN-76 until fiscal year 2000. However, the BUR concluded that, as a result of the delay, existing contracts would not be completed until the mid-1990s, and a lack of subsequent orders would threaten NNS' viability by 1997. NNS will need to fill in a large gap in workload between fiscal years 1996 and 2001. The shipyard does have the capability to construct nuclear submarines and other surface ships and therefore could complete other types of shipyard work to compensate for the drop-off in workload. The shipyard will begin the nuclear refueling complex overhaul of the U.S.S. Nimitz (CVN-68) in fiscal year 1998 while it completes construction work on the U.S.S. United States (CVN-75), scheduled for commissioning in fiscal year 1998. This work will enable NNS to sustain a nuclear-capable workforce. Figure 2.18 shows that the overall employment level at NNS is at or below the critical 10,000-employee level in fiscal years 1996-2001. This option does not have as large a drop-off in the projected total workforce beginning in fiscal year 2014 than either the BUR option, in which employment level drops below 10,000, or the option to start construction of CVN-76 in fiscal year 1998. The financial outlays required for this option are less than any of the nuclear carrier force structure options for the near term (fiscal years 1995-99) and long term (1995-2035). In the near term, the outlays are less than half of those required for the BUR option because of the delay in the construction start of CVN-76. Using this option the Navy would not build a nuclear carrier before the transition to a conventional carrier construction program in fiscal year 2002, with the start of CVA-76. This option provides a 7-year design period, sustains a steady new carrier construction start interval of 3-1/2 years, and fully utilizes the service lives of almost all of the conventional carriers in the fleet. (See fig. 2.19.) The delay in the construction start enables several conventional carriers in the active force to remain in service longer than in the BUR plan. This option also provides for longer service lives for most carriers currently in the active fleet than under the Navy's Recapitalization Plan. The U.S.S. Kitty Hawk (CV-63) and U.S.S. Constellation (CV-64) remain active slightly beyond their estimated notional lives, enabling these ships to complete a last deployment within their last maintenance cycle. The U.S.S. John F. Kennedy (CV-67) is programmed for a 50-year service life because of its reduced tempo of operations as the reserve/training carrier. Nimitz-class nuclear carriers remain in the fleet for 47 to 50 years. This option requires all Nimitz-class nuclear carriers to undergo nuclear refuelings and complex overhauls. As shown in figure 2.20, deferring construction of the next carrier until fiscal year 2002 results in continuing near-term declines in employment levels at NNS. The only carrier program work expected in the shipyard during that time period is the completion of construction of the U.S.S. United States (CVN-75) and the nuclear refueling complex overhaul of the U.S.S. Nimitz (CVN-68), which begins in fiscal year 1998. NNS would need other work to bring levels above the critical 10,000-employee level between fiscal years 1996 and 2001. After this period, employment levels average from 15,000 to 20,000 persons through fiscal year 2024. This option requires fewer outlays than any other option we examined except for option 1B's (conventional carrier replacement rate) long-term estimate. The reduction in outlays is a result of delaying the construction start of the next aircraft carrier until fiscal year 2002, building conventional carriers that have a much lower procurement cost, and retaining carriers longer in the active fleet. The near-term outlays (fiscal years 1995-99) are approximately 35 percent of the BUR option's outlays for the same period. In the long term (fiscal years 1995-2035), this option will save almost $19 billion in outlays over the amount projected to be spent for the BUR option. This option costs approximately $4.5 billion less in the long term than the option that begins conventional carrier construction with CVA-77.

Summary:
GAO reviewed the Navy's aircraft carrier program, focusing on: (1) the budget implications of the options for meeting the Department of Defense's Bottom-Up Review (BUR) force structure requirement for 12 carriers; and (2) each option's effect on the shipbuilding contractor's employment levels. GAO found that: (1) there are several available options for maintaining the 12-carrier force at less cost than projected in the BUR and the Navy Recapitalization Plan; (2) the least expensive option maintains employment levels at or above minimum levels, authorizes building the proposed nuclear carrier in fiscal year 1995, switches to construction of conventionally powered carriers in later years, and would cost 25 percent less than the BUR and Navy Recapitalization Plan options; (3) options to build CVN-76 in fiscal year 1995 would stop the downward trend in employment at about the minimum sustaining employment level of 10,000 employees, require building carriers sooner than they are needed for force structure purposes, and incur expenses sooner than necessary; (4) options to delay building the carrier would result in a continuing decline in employment to about 7,500 employees; (5) in the long term the employment levels in the BUR and the Navy Recapitalization Plan also fall below 10,000 employees; (6) the option to build nuclear carriers at the historical rate of one every 3 years maintains stable employment levels but costs about 40 percent more than the options in the BUR and the Navy Recapitalization Plan; (7) options for using carriers for their full service lives are less expensive than those in the BUR and Navy Recapitalization Plan, but in the near term the employment levels fall below the minimum sustaining level; (8) a transition to constructing conventionally powered carriers would save the largest amount of investment resources; and (9) criteria for comparing nuclear and conventional carriers include affordability, operational effectiveness, potential utilization, availability of homeports and shipyards for maintenance, and supporting infrastructure such as training and disposal of nuclear materials.