
Note: Shoho's superstructure looks slightly different from Zuiho's after its accident when it was supposedly turned into a Museum Ship (which in fact it isn't)
Zuiho, Japan Koukuubokan laid down 1920
Displacement:
26,170 t light; 26,954 t standard; 33,943 t normal; 39,398 t full load
Dimensions: Length overall / water x beam x draught
809.41 ft / 800.00 ft x 97.00 ft (Bulges 108.00 ft) x 25.00 ft (normal load)
246.71 m / 243.84 m x 29.57 m (Bulges 32.92 m) x 7.62 m
Armament:
12 - 5.12" / 130 mm guns in single mounts, 67.03lbs / 30.40kg shells, 1914 Model
Breech loading guns in casemate mounts
on side ends, evenly spread
12 guns in hull casemates - Limited use in heavy seas
8 - 4.13" / 105 mm guns (4x2 guns), 35.32lbs / 16.02kg shells, 1917 Model
Breech loading guns in turrets (on barbettes)
on side, all amidships, 2 raised mounts - superfiring
12 - 1.97" / 50.0 mm guns (6x2 guns), 3.81lbs / 1.73kg shells, 1918 Model
Breech loading guns in deck mounts
on side, evenly spread
30 - 0.98" / 25.0 mm guns (10x3 guns), 0.48lbs / 0.22kg shells, 1918 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 1,147 lbs / 520 kg
Shells per gun, main battery: 150
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11.0" / 279 mm 360.00 ft / 109.73 m 12.00 ft / 3.66 m
Ends: Unarmoured
Upper: 2.00" / 51 mm 360.00 ft / 109.73 m 14.00 ft / 4.27 m
Main Belt covers 69 % of normal length
- Torpedo Bulkhead and Bulges:
2.00" / 51 mm 360.00 ft / 109.73 m 22.95 ft / 7.00 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm - 4.00" / 102 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -
- Armour deck: 2.00" / 51 mm, Conning tower: 14.00" / 356 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 88,945 shp / 66,353 Kw = 27.00 kts
Range 15,500nm at 18.00 kts (Bunkerage = 12,580 tons)
Complement:
1,249 - 1,625
Cost:
£3.479 million / $13.915 million
Distribution of weights at normal displacement:
Armament: 143 tons, 0.4 %
Armour: 5,777 tons, 17.0 %
- Belts: 2,635 tons, 7.8 %
- Torpedo bulkhead: 611 tons, 1.8 %
- Armament: 270 tons, 0.8 %
- Armour Deck: 1,943 tons, 5.7 %
- Conning Tower: 317 tons, 0.9 %
Machinery: 3,110 tons, 9.2 %
Hull, fittings & equipment: 10,740 tons, 31.6 %
Fuel, ammunition & stores: 7,772 tons, 22.9 %
Miscellaneous weights: 6,400 tons, 18.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
60,039 lbs / 27,233 Kg = 895.6 x 5.1 " / 130 mm shells or 9.7 torpedoes
Stability (Unstable if below 1.00): 1.38
Metacentric height 9.9 ft / 3.0 m
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.02
Seaboat quality (Average = 1.00): 1.68
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 7.41 : 1
'Natural speed' for length: 28.28 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 42
Bow angle (Positive = bow angles forward): 15.39 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 34.20 ft / 10.42 m
- Forecastle (20 %): 24.20 ft / 7.38 m
- Mid (50 %): 24.20 ft / 7.38 m
- Quarterdeck (15 %): 24.20 ft / 7.38 m
- Stern: 24.20 ft / 7.38 m
- Average freeboard: 25.00 ft / 7.62 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 68.8 %
- Above water (accommodation/working, high = better): 193.8 %
Waterplane Area: 52,523 Square feet or 4,880 Square metres
Displacement factor (Displacement / loading): 174 %
Structure weight / hull surface area: 138 lbs/sq ft or 675 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.07
- Longitudinal: 1.04
- Overall: 1.05
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
SS1 Data:
Zuiho, Japan Carrier laid down 1920
Displacement:
26,000 t light; 26,775 t standard; 33,943 t normal; 39,542 t full load
Loading submergence 1,654 tons/feet
Dimensions:
800.00 ft x 108.00 ft x 25.00 ft (normal load)
243.84 m x 32.92 m x 7.62 m
Armament:
12 - 13.0 cm (5.12") / 50 cal Model 1914 guns in single casemate mounts
Main guns mounted low & subject to being washed down in a seaway
8 - 10.5 cm (4.13") / 50 cal Model 1918 guns (4 2nd turrets x 2 guns, 2 superfiring turrets)
12 - 50 mm (1.97") / 60 cal Model 1918 AA guns
30 - 25 mm (0.98") / 60 cal Model 1918 light AA guns
Weight of broadside 1,147 lbs / 520 kg
Planes 75
Armour:
Belt 11.00" / 279 mm, upper belt 2.00" / 51 mm, end belts 3.50" / 89 mm
Belts cover 65 % of normal area
Main gun casemate 4.00" / 25 mm, 2nd gun turrets 1.00" / 152 mm
AA gun shields 1.00" / 25 mm, Light gun shields 1.00" / 25 mm
Armour deck 2.00" / 51 mm, Conning tower 14.00" / 356 mm
Torpedo bulkhead 2.00" / 51 mm
Machinery:
12 Kanpon oil fired boilers, Brown Curtis geared steam turbines,
Geared drive, 4 shafts, 88,945 shp / 66,353 Kw = 27.00 kts
Range 15,500nm at 18.00 kts
Complement:
50 officers, 1426 other rank (1,250 - 1,625)
Cost:
£3.465 million / $13.859 million
Distribution of weights at normal displacement:
Armament: 143 tons, 0.4 %
Armour: 6,157 tons, 18.1 %
Belts: 2,488 tons, 7.3 %, Armament: 248 tons, 0.7 %, Armour Deck: 2,142 tons, 6.3 %
Conning Tower: 317 tons, 0.9 %, Torpedo bulkhead: 962 tons, 2.8 %
Machinery: 3,110 tons, 9.2 %
Hull, fittings & equipment: 10,965 tons, 32.3 %
Fuel, ammunition & stores: 7,942 tons, 23.4 %
Miscellaneous weights: 5,625 tons, 16.6 %
Metacentric height 10.0
Remarks:
Hull space for machinery, storage & compartmentation is excellent
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable and able to fight her guns in the heaviest weather
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.39
Shellfire needed to sink: 69,360 lbs / 31,461 Kg = 1,963.7 x 4.1 " / 105 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 11.4
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.04
Relative quality as seaboat: 1.64
Hull form characteristics:
Block coefficient: 0.550
Sharpness coefficient: 0.38
Hull speed coefficient 'M': 7.56
'Natural speed' for length: 28.28 kts
Power going to wave formation at top speed: 44 %
Trim: 43
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 64.0 %
Relative accommodation and working space: 220.5 %
(Average = 100%)
Displacement factor: 177 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.04
(Structure weight / hull surface area: 137 lbs / square foot or 668 Kg / square metre)
Relative longitudinal hull strength: 1.03
(for 25.00 ft / 7.62 m average freeboard, freeboard adjustment 5.66 ft)
Relative composite hull strength: 1.03