Vigilant Trimarian Command Battleship

Length:  962 m (wl); 984 m (oa); 
Beam: 237 m; 
Draught: 26.7 m
Displacement: 2.85 million tonnes full load

Armament:

5 x 4 762 mm ETC guns (A, B, C, X, Y positions);
6 x 1 203 mm naval railguns guns port and starboard; 
6 x 2 153 mm ETC guns port and starboard;
4 x 96 cell Mk 136 VLS launchers;
8 x 660 mm TT;
16 x Hornet SAM launchers;
20 x Rattlesnake CIWS

Protection:

1,200 mm - 1,600 mm advanced armour composite (titanium, vadium, aluminum, amorphous steel; 
Enhanced ERA; 
Ballistic ceramics; 
Depleted uranium on trimaran hull construction. Double-bottomed, reinforced keel with void spaces including KERI foam;
Support provided by honeycomb frame. Composite rods and ceramic kinetic reducing plates provide additional protection against KE attacks.

Propulsion:

12 x Pebblebed nuclear reactors with 14 propulsors and 8 internalised waterjets
Compulsators provide power to railguns from primary power system 
Each reactor surrounded by thermal insulation to reduce noise emission and infared signature 
6 diesel turbines provide emergency propulsion. 31.2 knots maximum. 28.4 knots maximum cruise

Aircraft:

Capable of carrying and launching 60-72 STOL aircraft from two full runways near the outriggers
Also carries 12 medium helicopters for ASW patrols.

Electronics:

AN/SLY-2 (V) Advanced Integrated Electronics Warfare System; 
AN/SPY-4 MFR and AN/SPN-23 navigational radars; 
AN/SQR-6 (B ) passive towed array and AN/SQS-57 dual-mode mounted digital sonar array; 
A/P Mounted Sonar: AN/SQS-57 active/passive, preformed beam, digital sonar providing panoramic echo ranging and panoramic (DIMUS) passive surveillance.

Countermeasures: Decoy: AN/SLQ-25 Nixie.

Complement: 10,600 + 190 aircrew

Price: $355 billion

Running Cost: $40 billion.