Oregon-class, United States Navy fast battleship laid down 1921

Displacement:

43,311 t light; 45,561 t standard; 48,062 t normal; 50,064 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)

(874.33 ft / 850.00 ft) x 99.00 ft (Bulges 114.00 ft) x (31.00 / 32.18 ft)

(266.50 m / 259.08 m) x 30.18 m (Bulges 34.75 m) x (9.45 / 9.81 m)

Armament:

8 - 16.00" / 406 mm 50.0 cal guns - 2,110.00lbs / 957.08kg shells, 120 per gun

Breech loading guns in turret on barbette mounts, 1918 Model

2 x Twin mounts on centreline, forward deck forward

1 raised mount - superfiring

2 x Twin mounts on centreline, aft deck aft

1 raised mount aft - superfiring

14 - 6.00" / 152 mm 53.0 cal guns - 105.01lbs / 47.63kg shells, 200 per gun

Breech loading guns in casemate mounts, 1920 Model

14 x Single mounts on sides, evenly spread

4 raised mounts

Weight of broadside 18,350 lbs / 8,323 kg

Armour:

- Belts: Width (max) Length (avg) Height (avg)

Main: 12.0" / 305 mm 595.00 ft / 181.36 m 15.00 ft / 4.57 m

Ends: Unarmoured

Main Belt covers 108 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:

2.00" / 51 mm 595.00 ft / 181.36 m 29.10 ft / 8.87 m

Beam between torpedo bulkheads 72.00 ft / 21.95 m

- Hull Bulges:

1.00" / 25 mm 595.00 ft / 181.36 m 29.10 ft / 8.87 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)

Main: 12.0" / 305 mm 8.00" / 203 mm 10.0" / 254 mm

2nd: 3.00" / 76 mm - -

- Armoured deck - multiple decks:

For and Aft decks: 6.00" / 152 mm

Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm

- Conning towers: Forward 8.00" / 203 mm, Aft 0.00" / 0 mm

Machinery:

Oil fired boilers, steam turbines,

Electric motors, 4 shafts, 180,002 shp / 134,282 Kw = 30.88 kts

Range 15,268nm at 10.00 kts

Bunker at max displacement = 4,503 tons

Complement:

1,622 - 2,109

Cost:

£10.869 million / $43.477 million

Distribution of weights at normal displacement:

Armament: 3,410 tons, 7.1 %

- Guns: 3,410 tons, 7.1 %

Armour: 14,963 tons, 31.1 %

- Belts: 4,425 tons, 9.2 %

- Torpedo bulkhead: 1,281 tons, 2.7 %

- Bulges: 641 tons, 1.3 %

- Armament: 2,609 tons, 5.4 %

- Armour Deck: 5,780 tons, 12.0 %

- Conning Tower: 228 tons, 0.5 %

Machinery: 6,198 tons, 12.9 %

Hull, fittings & equipment: 18,740 tons, 39.0 %

Fuel, ammunition & stores: 4,752 tons, 9.9 %

Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

57,350 lbs / 26,014 Kg = 28.0 x 16.0 " / 406 mm shells or 8.9 torpedoes

Stability (Unstable if below 1.00): 1.28

Metacentric height 7.7 ft / 2.3 m

Roll period: 17.3 seconds

Steadiness - As gun platform (Average = 50 %): 45 %

- Recoil effect (Restricted arc if above 1.00): 0.36

Seaboat quality (Average = 1.00): 0.82

Hull form characteristics:

Hull has a flush deck,

a straight bulbous bow and a cruiser stern

Block coefficient (normal/deep): 0.560 / 0.562

Length to Beam Ratio: 7.46 : 1

'Natural speed' for length: 29.15 kts

Power going to wave formation at top speed: 51 %

Trim (Max stability = 0, Max steadiness = 100): 50

Bow angle (Positive = bow angles forward): 40.00 degrees

Stern overhang: -8.00 ft / -2.44 m

Freeboard (% = length of deck as a percentage of waterline length):

Fore end, Aft end

- Forecastle: 15.00 %, 29.00 ft / 8.84 m, 22.00 ft / 6.71 m

- Forward deck: 30.00 %, 22.00 ft / 6.71 m, 17.50 ft / 5.33 m

- Aft deck: 40.00 %, 17.50 ft / 5.33 m, 17.50 ft / 5.33 m

- Quarter deck: 15.00 %, 17.50 ft / 5.33 m, 20.00 ft / 6.10 m

- Average freeboard: 19.46 ft / 5.93 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 107.2 %

- Above water (accommodation/working, high = better): 128.5 %

Waterplane Area: 59,281 Square feet or 5,507 Square metres

Displacement factor (Displacement / loading): 106 %

Structure weight / hull surface area: 233 lbs/sq ft or 1,137 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 1.15

- Longitudinal: 0.95

- Overall: 1.00

Adequate machinery, storage, compartmentation space

Excellent accommodation and workspace room

Poor seaboat, wet and uncomfortable, reduced performance in heavy weather