USS Seattle Refit 2

USS Seattle, American Seattle-class anti-aircraft cruiser laid down 1947 (Engine 1950)

Displacement:
	17,832 t light; 18,694 t standard; 20,144 t normal; 21,304 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(704.25 ft / 679.13 ft) x 71.49 ft (Bulges 78.51 ft) x (24.90 / 26.12 ft)
	(214.66 m / 207.00 m) x 21.79 m (Bulges 23.93 m)  x (7.59 / 7.96 m)

Armament:
      8 - 6.10" / 155 mm 62.0 cal guns - 187.39lbs / 85.00kg shells, 340 per gun
	  Dual purpose guns in turret on barbette mounts, 1950 Model
	  2 x 2-gun mounts on centreline, forward deck forward
		1 raised mount - superfiring
	  2 x 2-gun mounts on centreline, aft deck aft
		1 raised mount aft - superfiring
      6 - 5.00" / 127 mm 62.0 cal guns - 69.67lbs / 31.60kg shells, 600 per gun
	  Dual purpose guns in turret on barbette mounts, 1950 Model
	  6 x Single mounts on sides, evenly spread
		2 raised mounts
      8 - 3.00" / 76.2 mm 62.0 cal guns - 14.55lbs / 6.60kg shells, 560 per gun
	  Dual purpose guns in deck and hoist mounts, 1950 Model
	  4 x Single mounts on sides, forward evenly spread
		2 raised mounts
	  4 x Single mounts on sides, aft evenly spread
		2 raised mounts
      Weight of broadside 2,034 lbs / 922 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	5.00" / 127 mm	380.31 ft / 115.92 m	10.14 ft / 3.09 m
	Ends:	1.00" / 25 mm	298.79 ft / 91.07 m	10.14 ft / 3.09 m
	Upper:	5.00" / 127 mm	380.31 ft / 115.92 m	8.01 ft / 2.44 m
	  Main Belt covers 86 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
		3.00" / 76 mm	380.31 ft / 115.92 m	22.44 ft / 6.84 m
	Beam between torpedo bulkheads 64.47 ft / 19.65 m

   - Hull Bulges:
		2.00" / 51 mm	394.00 ft / 120.09 m	23.00 ft / 7.01 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	6.50" / 165 mm	3.25" / 83 mm		5.00" / 127 mm
	3rd:	5.00" / 127 mm	2.25" / 57 mm		3.25" / 83 mm
	4th:	1.00" / 25 mm	0.59" / 15 mm		3.00" / 76 mm

   - Armoured deck - multiple decks:
	For and Aft decks: 3.50" / 89 mm
	Forecastle: 1.00" / 25 mm  Quarter deck: 1.00" / 25 mm

   - Conning towers: Forward 4.50" / 114 mm, Aft 4.50" / 114 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 159,018 shp / 118,627 Kw = 33.79 kts
	Range 8,700nm at 15.00 kts
	Bunker at max displacement = 2,610 tons

Complement:
	845 - 1,099

Cost:
	£9.873 million / $39.492 million

Distribution of weights at normal displacement:
	Armament: 646 tons, 3.2 %
	   - Guns: 646 tons, 3.2 %
	Armour: 5,865 tons, 29.1 %
	   - Belts: 1,572 tons, 7.8 %
	   - Torpedo bulkhead: 947 tons, 4.7 %
	   - Bulges: 671 tons, 3.4 %
	   - Armament: 769 tons, 3.8 %
	   - Armour Deck: 1,762 tons, 8.7 %
	   - Conning Towers: 144 tons, 0.7 %
	Machinery: 3,804 tons, 18.9 %
	Hull, fittings & equipment: 6,715 tons, 33.3 %
	Fuel, ammunition & stores: 2,312 tons, 11.5 %
	Miscellaneous weights: 802 tons, 4.0 %
	   - Hull above water: 150 tons
	   - On freeboard deck: 505 tons
	   - Above deck: 147 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  34,466 lbs / 15,633 Kg = 303.3 x 6.1 " / 155 mm shells or 5.1 torpedoes
	Stability (Unstable if below 1.00): 1.18
	Metacentric height 4.1 ft / 1.3 m
	Roll period: 16.3 seconds
	Steadiness	- As gun platform (Average = 50 %): 54 %
			- Recoil effect (Restricted arc if above 1.00): 0.27
	Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
	Hull has low quarterdeck ,
	  an extended bulbous bow and a cruiser stern
	Block coefficient (normal/deep): 0.531 / 0.535
	Length to Beam Ratio: 8.65 : 1
	'Natural speed' for length: 26.06 kts
	Power going to wave formation at top speed: 59 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 37.00 degrees
	Stern overhang: 4.00 ft / 1.22 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	22.00 %,  28.02 ft / 8.54 m,  28.02 ft / 8.54 m
	   - Forward deck:	28.00 %,  28.02 ft / 8.54 m,  28.02 ft / 8.54 m
	   - Aft deck:	28.00 %,  28.02 ft / 8.54 m,  28.02 ft / 8.54 m
	   - Quarter deck:	22.00 %,  10.01 ft / 3.05 m,  10.01 ft / 3.05 m
	   - Average freeboard:		24.06 ft / 7.33 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 81.7 %
		- Above water (accommodation/working, high = better): 210.2 %
	Waterplane Area: 33,287 Square feet or 3,092 Square metres
	Displacement factor (Displacement / loading): 124 %
	Structure weight / hull surface area: 129 lbs/sq ft or 632 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.96
		- Longitudinal: 1.45
		- Overall: 1.00
	Excellent machinery, storage, compartmentation space
	Excellent accommodation and workspace room

Aviation facilities:
-Hangar for 4-6 SH-3 Sea King or SH-60 Seahawk helicopters below deck just fore of quarterdeck. Hangar opens onto quarterdeck landing pad.
-Landing pad for helicopters on quarterdeck.

Engine Changes:
-Steam plant replaced with 6x GE LM2500 gas turbines, generating 26,500 shp per turbine.

Special Ammunition for Guns:
-155mm/62 guns can fire LRLAP (Long Range Land Attack Projectile), in addition to normal US Armed Forces 155mm shells. Ammunition stowage designed for average shell weight of no more than 85 kg per shell (ie., so long as the shell load does not exceed 28,900 kg, it will not cause the ship to exceed design displacement, assuming full propellant loads for all shells).
-5"/62 guns can fire HVP (High Velocity Projectile) as a ballistic trajectory extended range munition, in addition to normal 5"/54 ammunition
-3"/62 guns can fire DART (Driven Ammunition Reduced Time-of-flight) ammunition, using an on-mount targeting radar to direct the sub-caliber guided munitions.

Missile and CIWS Armament:
-4x 'Legion' CIWS mounts, each armed with 1x GAU-8 Avenger rotary cannon and 21x RIM-116 Rolling Airframe Missile
-4x Mk 141 Harpoon GMLS, with 4 missiles per launcher, for a total of 16 Harpoon missiles
-Mk 41 VLS, with a total of 128 cells in two batteries (one fore and one aft), can accept Tomahawk, ESSM, VL-ASROC, and Standard missiles.

Electronics:
-AEGIS Combat System
-Modern sonar, including towed array
-LAMPS III shipboard system (all carried helicopters can support LAMPS III hardware)