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- USS Seattle, American Seattle-class anti-aircraft cruiser laid down 1947 (Engine 1950)
- Displacement:
- 17,765 t light; 18,652 t standard; 20,090 t normal; 21,241 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 (24.84 / 26.05 ft)
- (214.66 m / 207.00 m) x 21.79 m (Bulges 23.93 m) x (7.57 / 7.94 m)
- Armament:
- 9 - 6.00" / 152 mm 47.0 cal guns - 112.35lbs / 50.96kg shells, 269 per gun
- Dual purpose guns in turret on barbette mounts, 1947 Model
- 2 x 3-gun mounts on centreline, forward deck forward
- 1 raised mount - superfiring
- 1 x 3-gun mount on centreline, forward deck centre
- 1 double raised mount
- 9 - 6.00" / 152 mm 47.0 cal guns - 112.35lbs / 50.96kg shells, 269 per gun
- Dual purpose guns in turret on barbette mounts, 1947 Model
- 2 x 3-gun mounts on centreline, aft deck aft
- 1 raised mount - superfiring
- 1 x 3-gun mount on centreline, aft deck centre
- 1 double raised mount
- 6 - 5.00" / 127 mm 54.0 cal guns - 69.00lbs / 31.30kg shells, 600 per gun
- Dual purpose guns in turret on barbette mounts, 1947 Model
- 4 x Single mounts on sides, forward deck aft
- 2 raised mounts - superfiring
- 2 x Single mounts on sides, aft deck forward
- 10 - 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, 1947 Model
- 6 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 2,582 lbs / 1,171 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 22.57 ft / 6.88 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
- 2nd: 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 4.49" / 114 mm, Aft 4.49" / 114 mm
- Machinery:
- Oil fired boilers, steam turbines,
- Geared drive, 4 shafts, 142,003 shp / 105,935 Kw = 32.88 kts
- Range 8,640nm at 15.00 kts
- Bunker at max displacement = 2,589 tons
- Complement:
- 843 - 1,096
- Cost:
- £9.917 million / $39.668 million
- Distribution of weights at normal displacement:
- Armament: 857 tons, 4.3 %
- - Guns: 857 tons, 4.3 %
- Armour: 6,268 tons, 31.2 %
- - Belts: 1,570 tons, 7.8 %
- - Torpedo bulkhead: 953 tons, 4.7 %
- - Bulges: 671 tons, 3.3 %
- - Armament: 1,167 tons, 5.8 %
- - Armour Deck: 1,764 tons, 8.8 %
- - Conning Towers: 143 tons, 0.7 %
- Machinery: 3,397 tons, 16.9 %
- Hull, fittings & equipment: 6,756 tons, 33.6 %
- Fuel, ammunition & stores: 2,326 tons, 11.6 %
- Miscellaneous weights: 487 tons, 2.4 %
- - Hull above water: 150 tons
- - On freeboard deck: 237 tons
- - Above deck: 100 tons
- Overall survivability and seakeeping ability:
- Survivability (Non-critical penetrating hits needed to sink ship):
- 33,041 lbs / 14,987 Kg = 305.9 x 6.0 " / 152 mm shells or 5.3 torpedoes
- Stability (Unstable if below 1.00): 1.12
- Metacentric height 3.8 ft / 1.1 m
- Roll period: 17.0 seconds
- Steadiness - As gun platform (Average = 50 %): 51 %
- - Recoil effect (Restricted arc if above 1.00): 0.35
- Seaboat quality (Average = 1.00): 1.01
- 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: 57 %
- 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, 24.93 ft / 7.60 m
- - Forward deck: 28.00 %, 24.93 ft / 7.60 m, 24.93 ft / 7.60 m
- - Aft deck: 28.00 %, 24.93 ft / 7.60 m, 24.93 ft / 7.60 m
- - Quarter deck: 22.00 %, 10.01 ft / 3.05 m, 10.01 ft / 3.05 m
- - Average freeboard: 21.92 ft / 6.68 m
- Ship tends to be wet forward
- Ship space, strength and comments:
- Space - Hull below water (magazines/engines, low = better): 77.8 %
- - Above water (accommodation/working, high = better): 187.5 %
- Waterplane Area: 33,287 Square feet or 3,092 Square metres
- Displacement factor (Displacement / loading): 125 %
- Structure weight / hull surface area: 136 lbs/sq ft or 665 Kg/sq metre
- Hull strength (Relative):
- - Cross-sectional: 0.97
- - Longitudinal: 1.29
- - Overall: 1.00
- Excellent machinery, storage, compartmentation space
- Excellent accommodation and workspace room
- Aviation facilities:
- -Hangar for 4-6 SH-3 Sea King helicopters below deck just fore of quarterdeck. Hangar opens onto quarterdeck landing pad.
- -Landing pad for helicopters on quarterdeck.
- Missile Armament:
- -2x Mk 26 Mod 1 GMLS, 88 missiles in total. Can carry any combination of SM-1, SM-2, Harpoon, and ASROC.
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