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CVN-68 Nimitz class

Specifications
Builder Newport News Shipbuilding Co., Newport News, Va.
Power Plant Two Nuclear Power Plant
(A4W Pressurized Water Reactor)
Four shafts, Four propellers, with five blades each
Length, overall 1,092 feet (332.85 meters)
Flight Deck Width 252 feet (76.8 meters)
Beam 134 feet (40.84 meters)
Displacement
Ship Delivery
Displacement (tons)
Predicted Current
Displacement (tons)
68 93,283 100,064
69 93,832 100,588
70 94,069 100,599
71 96,865 103,700
72 97,497 103,912
73 97,816 104,095
74 97,490 103,419
75 97,944 103,863
76 97,953 101,187

Ships get heavier as they age. The Chief of Naval Operatbns (CNO) has prescribed a requirement for "Service Life Allowance" of aircraft carriers of 7.5 percent weight margin (displacement.) The newest Nimitz carriers have approximately 1 percent margin remaining. They cannot incorporate design changes without identifying offsetting weight and stability changes. Additionally, the existing low stability margins can result in operational complexities. Increasing weight degraded speed; its distribution has also degraded stability and hence the ability to handle heavy seas and the sea conditions needed to launch and recover aircraft.

Sea-worthiness remains an important consideration, even for ships a large as aircraft carriers. The Nimitz class is generally limited to flight operations for deck excursions normal for sea-states below 5.

Speed 30+ knots (34.5+ miles per hour)
Aircraft 85
Aircraft elevators Four
Catapults Four
Armament 4 Sea Sparrow launchers
3 Phalanx CIWS 20mm mounts [Nimitz & Ike]
4 Phalanx CIWS 20mm mounts [Vinson and later]
Combat Systems SPS-48E 3-D air search radar
SPS-49(V)5 2-D air search radar
3 Mk91 Fire Control

Multi-Function Radar (MFR) [CVN-77]
Volume Search Radar (VSR) [CVN-77]

AN/SLQ-32(V)4 active jamming/deception
AN/WLR-1H ESM
Service Life 50 years
Crew Ship's Company: 3,200
Air Wing: 2,480

Departments
Administrative
Aircraft Maintenance
Air
Chaplain
Combat Systems
Deck
Dental
Engineering
Legal
Maintenance
Medical
Navigation
Operations
Public Affairs
Reactor
Safety
Supply
Training
Weapons
Unit Operating Cost
Annual Average
~$160,000,000 [source: [FY1996 VAMOSC]
Total Costs
[$millions
constant $FY97]

Investment cost 
     Ship acquisition cost                   $ 4,059
     Midlife modernization cost              $ 2,382
     Total investment cost                   $ 6,441 
Average annual investment cost               $   129
Operating and support cost
     Direct operating and support cost       $11,677
     Indirect operating and support cost     $ 3,205
     Total operating and support cost        $14,882
Average annual operating and support cost    $   298
Inactivation/disposal cost
     Inactivation/disposal cost              $   887
     Spent nuclear fuel storage cost         $    13
     Total inactivation/disposal cost        $   899
Average annual inactivation/disposal cost    $    18  

Total life-cycle cost $22,222 Average annual life-cycle cost $ 444 [source: GAO]



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