WesWorld

Aircraft Carriers of the Japanese Navy.


Large Carriers in service.


Zuiho Class: Zuiho, Shoho.

Soryu Class: Soryu, Hiryu.

Shokaku Class: Shokaku, Zuikaku.

Unryu Class: Unryu, Ryuho.

Hiyo Class: Hiyo, Junyo.

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

Note: I made an error simming the vessel back when we were in 1925 due to the change from springstyle to springsharp. Main and secondary guns should be "mounts with hoists", not "turrets (on barbettes)".


Shinyo (ex RCN Chosen), Japan Carrier laid down 1925
Transferred from Chosen to Japan in Q1/1944 for 10 submarines.

Displacement:
17,708 t light; 18,154 t standard; 20,240 t normal; 21,909 t full load

Dimensions: Length overall / water x beam x draught
706.38 ft / 700.00 ft x 80.00 ft x 23.00 ft (normal load)
215.30 m / 213.36 m x 24.38 m x 7.01 m

Armament:
8 - 4.13" / 105 mm guns (4x2 guns), 36.00lbs / 16.33kg shells, 1921 Model
Dual purpose guns in turrets (on barbettes)
on side ends, evenly spread, 2 raised mounts - superfiring
8 - 2.95" / 75.0 mm guns (4x2 guns), 12.00lbs / 5.44kg shells, 1921 Model
Dual purpose guns in turrets (on barbettes)
on side ends, evenly spread
16 - 1.57" / 40.0 mm guns (4x4 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
24 - 0.98" / 25.0 mm guns (8x3 guns), 0.57lbs / 0.26kg shells, 1918 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 430 lbs / 195 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 570.50 ft / 173.89 m 10.73 ft / 3.27 m
Ends: Unarmoured
Main Belt covers 125 % of normal length

- Torpedo Bulkhead:
1.00" / 25 mm 570.50 ft / 173.89 m 21.11 ft / 6.43 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -

- Armour deck: 3.00" / 76 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 144,432 shp / 107,746 Kw = 33.00 kts
Range 10,000nm at 15.00 kts (Bunkerage = 3,754 tons)

Complement:
847 - 1,102

Cost:
£4.324 million / $17.296 million

Distribution of weights at normal displacement:
Armament: 54 tons, 0.3 %
Armour: 3,794 tons, 18.7 %
- Belts: 995 tons, 4.9 %
- Torpedo bulkhead: 446 tons, 2.2 %
- Armament: 136 tons, 0.7 %
- Armour Deck: 2,169 tons, 10.7 %
- Conning Tower: 48 tons, 0.2 %
Machinery: 4,689 tons, 23.2 %
Hull, fittings & equipment: 6,146 tons, 30.4 %
Fuel, ammunition & stores: 2,532 tons, 12.5 %
Miscellaneous weights: 3,025 tons, 14.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,494 lbs / 6,574 Kg = 410.3 x 4.1 " / 105 mm shells or 2.0 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 4.5 ft / 1.4 m
Roll period: 15.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 1.06

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 8.75 : 1
'Natural speed' for length: 26.46 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 66
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (20 %): 21.00 ft / 6.40 m
- Mid (50 %): 20.00 ft / 6.10 m
- Quarterdeck (15 %): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 21.07 ft / 6.42 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 125.3 %
- Above water (accommodation/working, high = better): 177.8 %
Waterplane Area: 39,082 Square feet or 3,631 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 109 lbs/sq ft or 530 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.00
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform




Shinyo (ex Chosen), Japan Carrier laid down 1925 (1945 refit)

Displacement:
17,533 t light; 18,154 t standard; 20,240 t normal; 21,909 t full load

Dimensions: Length overall / water x beam x draught
706.38 ft / 700.00 ft x 80.00 ft x 23.00 ft (normal load)
215.30 m / 213.36 m x 24.38 m x 7.01 m

Armament:
8 - 4.13" / 105 mm guns (4x2 guns), 34.00lbs / 15.42kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on side ends, evenly spread, 2 raised mounts - superfiring
8 - 2.95" / 75.0 mm guns (4x2 guns), 12.00lbs / 5.44kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on side ends, evenly spread
24 - 1.57" / 40.0 mm guns (4x6 guns), 2.00lbs / 0.91kg shells, 1945 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
24 - 0.98" / 25.0 mm guns (6x4 guns), 0.57lbs / 0.26kg shells, 1945 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 430 lbs / 195 kg
Shells per gun, main battery: 768

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 575.00 ft / 175.26 m 11.00 ft / 3.35 m
Ends: Unarmoured
Main Belt covers 126% of normal length

- Torpedo Bulkhead:
1.00" / 25 mm 575.00 ft / 175.26 m 21.50 ft / 6.55 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 1.00" / 25 mm - 1.00" / 25 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -

- Armour deck: 3.00" / 76 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 144,432 shp / 107,746 Kw = 33.00 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 3,754 tons

Complement:
847 - 1,102

Cost:
£4.336 million / $17.344 million

Distribution of weights at normal displacement:
Armament: 65 tons, 0.3%
Armour: 3,749 tons, 18.5%
- Belts: 1,027 tons, 5.1%
- Torpedo bulkhead: 457 tons, 2.3%
- Armament: 48 tons, 0.2%
- Armour Deck: 2,169 tons, 10.7%
- Conning Tower: 48 tons, 0.2%
Machinery: 4,689 tons, 23.2%
Hull, fittings & equipment: 6,130 tons, 30.3%
Fuel, ammunition & stores: 2,707 tons, 13.4%
Miscellaneous weights: 2,900 tons, 14.3%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
24,321 lbs / 11,032 Kg = 688.6 x 4.1 " / 105 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 4.7 ft / 1.4 m
Roll period: 15.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 1.07

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 8.75 : 1
'Natural speed' for length: 26.46 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 66
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (20%): 21.00 ft / 6.40 m
- Mid (50%): 20.00 ft / 6.10 m
- Quarterdeck (15%): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 21.07 ft / 6.42 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 126.2%
- Above water (accommodation/working, high = better): 177.8%
Waterplane Area: 39,082 Square feet or 3,631 Square metres
Displacement factor (Displacement / loading): 122%
Structure weight / hull surface area: 108 lbs/sq ft or 529 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.01
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Space for 45 planes (2025 tons)

Actual rounds per gun
105mm => 400 rpg = 60t
75mm => 1500 rpg =80t
40mm => 2000 rpg = 53t
25mm => 3000 rpg = 23t
Total magazine weight: 216 tons = 768 rounds

Miscellaneous weights (2900t)
- 2025 tons for 45 planes
- 180 tons for spare parts
- 135 tons for repair shop
- 100 tons for radar systems
- 90 tons for flight operations center
- 45 tons for briefing room
- 50 tons for carrier command center
- 150 tons for firecontrol and fire control center
- 60 tons for mount improvements
--- 32 tons for 105mm mounts
--- 16 tons for 75mm mounts
--- 6 tons for 40mm mounts
--- 6 tons for 25mm mounts
- 65 tons for crew comfort

Soryu, Japan Carrier laid down 1927

Displacement:
19,994 t light; 20,589 t standard; 22,685 t normal; 24,362 t full load

Dimensions: Length overall / water x beam x draught
731.30 ft / 720.00 ft x 72.00 ft (Bulges 82.00 ft) x 24.45 ft (normal load)
222.90 m / 219.46 m x 21.95 m (Bulges 24.99 m) x 7.45 m

Armament:
8 - 4.13" / 105 mm guns (4x2 guns), 36.00lbs / 16.33kg shells, 1921 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread, 2 raised mounts - superfiring
8 - 2.95" / 75.0 mm guns (4x2 guns), 13.00lbs / 5.90kg shells, 1921 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
16 - 1.57" / 40.0 mm guns (4x4 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
24 - 0.98" / 25.0 mm guns (8x3 guns), 0.57lbs / 0.26kg shells, 1926 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 438 lbs / 199 kg
Shells per gun, main battery: 500

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.00" / 178 mm 600.00 ft / 182.88 m 11.00 ft / 3.35 m
Ends: Unarmoured
Main Belt covers 128 % of normal length

- Torpedo Bulkhead and Bulges:
1.00" / 25 mm 582.00 ft / 177.39 m 22.44 ft / 6.84 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -

- Armour deck: 3.50" / 89 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 154,063 shp / 114,931 Kw = 34.30 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 3,773 tons

Complement:
923 - 1,201

Cost:
£5.184 million / $20.736 million

Distribution of weights at normal displacement:
Armament: 54 tons, 0.2 %
Armour: 4,888 tons, 21.5 %
- Belts: 1,857 tons, 8.2 %
- Torpedo bulkhead: 483 tons, 2.1 %
- Armament: 57 tons, 0.3 %
- Armour Deck: 2,439 tons, 10.8 %
- Conning Tower: 52 tons, 0.2 %
Machinery: 4,863 tons, 21.4 %
Hull, fittings & equipment: 6,574 tons, 29.0 %
Fuel, ammunition & stores: 2,691 tons, 11.9 %
Miscellaneous weights: 3,615 tons, 15.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
26,560 lbs / 12,047 Kg = 752.0 x 4.1 " / 105 mm shells or 3.6 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 3.6 ft / 1.1 m
Roll period: 18.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.550
Length to Beam Ratio: 8.78 : 1
'Natural speed' for length: 30.76 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): 20.64 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (20 %): 21.35 ft / 6.51 m
- Mid (50 %): 21.35 ft / 6.51 m
- Quarterdeck (15 %): 21.35 ft / 6.51 m
- Stern: 21.35 ft / 6.51 m
- Average freeboard: 22.04 ft / 6.72 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 124.3 %
- Above water (accommodation/working, high = better): 166.0 %
Waterplane Area: 37,665 Square feet or 3,499 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 112 lbs/sq ft or 546 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.01
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Space for 60 planes




Hiryu, Japan Carrier laid down 1927

Displacement:
19,994 t light; 20,589 t standard; 22,685 t normal; 24,362 t full load

Dimensions: Length overall / water x beam x draught
726.38 ft / 720.00 ft x 72.00 ft (Bulges 82.00 ft) x 24.45 ft (normal load)
221.40 m / 219.46 m x 21.95 m (Bulges 24.99 m) x 7.45 m

Armament:
8 - 4.13" / 105 mm guns (4x2 guns), 36.00lbs / 16.33kg shells, 1921 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread, 2 raised mounts - superfiring
8 - 2.95" / 75.0 mm guns (4x2 guns), 13.00lbs / 5.90kg shells, 1921 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
16 - 1.57" / 40.0 mm guns (4x4 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
24 - 0.98" / 25.0 mm guns (8x3 guns), 0.57lbs / 0.26kg shells, 1926 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 438 lbs / 199 kg
Shells per gun, main battery: 500

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.00" / 178 mm 600.00 ft / 182.88 m 11.00 ft / 3.35 m
Ends: Unarmoured
Main Belt covers 128 % of normal length

- Torpedo Bulkhead and Bulges:
1.00" / 25 mm 582.00 ft / 177.39 m 22.44 ft / 6.84 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -

- Armour deck: 3.50" / 89 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 154,063 shp / 114,931 Kw = 34.30 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 3,773 tons

Complement:
923 - 1,201

Cost:
£5.184 million / $20.736 million

Distribution of weights at normal displacement:
Armament: 54 tons, 0.2 %
Armour: 4,888 tons, 21.5 %
- Belts: 1,857 tons, 8.2 %
- Torpedo bulkhead: 483 tons, 2.1 %
- Armament: 57 tons, 0.3 %
- Armour Deck: 2,439 tons, 10.8 %
- Conning Tower: 52 tons, 0.2 %
Machinery: 4,863 tons, 21.4 %
Hull, fittings & equipment: 6,589 tons, 29.0 %
Fuel, ammunition & stores: 2,691 tons, 11.9 %
Miscellaneous weights: 3,600 tons, 15.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
26,588 lbs / 12,060 Kg = 752.7 x 4.1 " / 105 mm shells or 3.6 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 3.6 ft / 1.1 m
Roll period: 18.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.550
Length to Beam Ratio: 8.78 : 1
'Natural speed' for length: 30.76 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (20 %): 21.35 ft / 6.51 m
- Mid (50 %): 21.35 ft / 6.51 m
- Quarterdeck (15 %): 21.35 ft / 6.51 m
- Stern: 21.35 ft / 6.51 m
- Average freeboard: 22.04 ft / 6.72 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 124.2 %
- Above water (accommodation/working, high = better): 166.0 %
Waterplane Area: 37,665 Square feet or 3,499 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 112 lbs/sq ft or 547 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.02
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Space for 60 planes



Hiryu, Japan Carrier laid down 1927 (1945 refit; Soryu similar but slightly longer o.a.)

Displacement:
19,919 t light; 20,589 t standard; 22,685 t normal; 24,362 t full load

Dimensions: Length overall / water x beam x draught
726.38 ft / 720.00 ft x 72.00 ft (Bulges 82.00 ft) x 24.45 ft (normal load)
221.40 m / 219.46 m x 21.95 m (Bulges 24.99 m) x 7.45 m

Armament:
8 - 4.13" / 105 mm guns (4x2 guns), 34.00lbs / 15.42kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on side ends, evenly spread, 2 raised mounts - superfiring
8 - 2.95" / 75.0 mm guns (4x2 guns), 12.00lbs / 5.44kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on side ends, evenly spread
24 - 1.57" / 40.0 mm guns (4x6 guns), 2.00lbs / 0.91kg shells, 1945 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
24 - 0.98" / 25.0 mm guns (6x4 guns), 0.57lbs / 0.26kg shells, 1945 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 430 lbs / 195 kg
Shells per gun, main battery: 768

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.00" / 178 mm 600.00 ft / 182.88 m 11.00 ft / 3.35 m
Ends: Unarmoured
Main Belt covers 128% of normal length

- Torpedo Bulkhead and Bulges:
1.00" / 25 mm 582.00 ft / 177.39 m 22.44 ft / 6.84 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -

- Armour deck: 3.50" / 89 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 154,063 shp / 114,931 Kw = 34.30 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 3,773 tons

Complement:
923 - 1,201

Cost:
£5.210 million / $20.839 million

Distribution of weights at normal displacement:
Armament: 65 tons, 0.3%
Armour: 4,888 tons, 21.5%
- Belts: 1,857 tons, 8.2%
- Torpedo bulkhead: 483 tons, 2.1%
- Armament: 57 tons, 0.2%
- Armour Deck: 2,439 tons, 10.8%
- Conning Tower: 52 tons, 0.2%
Machinery: 4,863 tons, 21.4%
Hull, fittings & equipment: 6,553 tons, 28.9%
Fuel, ammunition & stores: 2,766 tons, 12.2%
Miscellaneous weights: 3,550 tons, 15.6%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
26,410 lbs / 11,980 Kg = 747.7 x 4.1 " / 105 mm shells or 3.6 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 3.6 ft / 1.1 m
Roll period: 18.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.550
Length to Beam Ratio: 8.78 : 1
'Natural speed' for length: 30.76 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (20%): 21.35 ft / 6.51 m
- Mid (50%): 21.35 ft / 6.51 m
- Quarterdeck (15%): 21.35 ft / 6.51 m
- Stern: 21.35 ft / 6.51 m
- Average freeboard: 22.04 ft / 6.72 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 124.8%
- Above water (accommodation/working, high = better): 166.0%
Waterplane Area: 37,665 Square feet or 3,499 Square metres
Displacement factor (Displacement / loading): 121%
Structure weight / hull surface area: 111 lbs/sq ft or 544 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.01
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Actual rounds per gun
105mm => 400 rpg = 60t
75mm => 1500 rpg =80t
40mm => 2000 rpg = 53t
25mm => 3000 rpg = 23t
Total magazine weight: 216 tons = 768 rounds

Miscellaneous weights (3550t)
- 2500 tons for 50 planes
- 150 tons for 6 spare planes
- 200 tons for spare parts
- 156 tons for repair shop
- 100 tons for radar systems
- 100 tons for flight operations center
- 50 tons for briefing room
- 50 tons for carrier command center
- 150 tons for firecontrol and fire control center
- 60 tons for mount improvements
--- 32 tons for 105mm mounts
--- 16 tons for 75mm mounts
--- 6 tons for 40mm mounts
--- 6 tons for 25mm mounts
- 34 tons for crew comfort

Shokaku class, Japan Carrier laid down 1936

Ships: Shokaku, Zuikaku

Displacement:
35,000 t light; 36,108 t standard; 39,301 t normal; 41,856 t full load

Dimensions: Length overall / water x beam x draught
845.52 ft / 810.00 ft x 100.00 ft x 32.00 ft (normal load)
257.71 m / 246.89 m x 30.48 m x 9.75 m

Armament:
8 - 5.00" / 127 mm guns (4x2 guns), 55.12lbs / 25.00kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 2 raised mounts - superfiring
16 - 4.13" / 105 mm guns (8x2 guns), 34.00lbs / 15.42kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
32 - 1.57" / 40.0 mm guns (4x8 guns), 2.00lbs / 0.91kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, all amidships
51 - 0.98" / 25.0 mm guns (17x3 guns), 0.57lbs / 0.26kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
32 - 0.52" / 13.2 mm guns (4x8 guns), 0.09lbs / 0.04kg shells, 1936 Model
Machine guns in deck mounts
on side ends, evenly spread
Weight of broadside 1,081 lbs / 490 kg
Shells per gun, main battery: 450

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.00" / 203 mm 510.00 ft / 155.45 m 12.00 ft / 3.66 m
Ends: 15.0" / 381 mm 26.00 ft / 7.92 m 26.00 ft / 7.92 m
274.00 ft / 83.52 m Unarmoured ends
Main Belt covers 97% of normal length

- Torpedo Bulkhead:
3.00" / 76 mm 510.00 ft / 155.45 m 32.00 ft / 9.75 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm 1.00" / 25 mm -
4th: 1.00" / 25 mm 1.00" / 25 mm -
5th: 0.50" / 13 mm 0.50" / 13 mm -

- Armour deck: 4.00" / 102 mm, Conning tower: 2.75" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 176,635 shp / 131,770 Kw = 33.00 kts
Range 12,000nm at 15.00 kts
Bunker at max displacement = 5,749 tons

Complement:
1,395 - 1,814

Cost:
£10.757 million / $43.026 million

Distribution of weights at normal displacement:
Armament: 144 tons, 0.4%
Armour: 8,768 tons, 22.3%
- Belts: 2,469 tons, 6.3%
- Torpedo bulkhead: 1,812 tons, 4.6%
- Armament: 144 tons, 0.4%
- Armour Deck: 4,275 tons, 10.9%
- Conning Tower: 68 tons, 0.2%
Machinery: 4,956 tons, 12.6%
Hull, fittings & equipment: 11,131 tons, 28.3%
Fuel, ammunition & stores: 4,302 tons, 10.9%
Miscellaneous weights: 10,000 tons, 25.4%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
58,253 lbs / 26,423 Kg = 932.0 x 5.0 " / 127 mm shells or 9.0 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 6.1 ft / 1.9 m
Roll period: 17.0 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.05
Seaboat quality (Average = 1.00): 1.28

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.531
Length to Beam Ratio: 8.10 : 1
'Natural speed' for length: 32.92 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 15.00 ft / 4.57 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 44.00 ft / 13.41 m
- Forecastle (20%): 25.00 ft / 7.62 m
- Mid (50%): 25.00 ft / 7.62 m
- Quarterdeck (15%): 25.00 ft / 7.62 m
- Stern: 24.00 ft / 7.32 m
- Average freeboard: 26.45 ft / 8.06 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.0%
- Above water (accommodation/working, high = better): 197.2%
Waterplane Area: 57,774 Square feet or 5,367 Square metres
Displacement factor (Displacement / loading): 132%
Structure weight / hull surface area: 133 lbs/sq ft or 649 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.21
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

90 planes
ends belt used to sim 15 spare planes.

Unryu (Improved Soryu class), Japan Carrier laid down 1939
Ships: Unryu, Ryuho

Displacement:
20,149 t light; 20,790 t standard; 22,667 t normal; 24,168 t full load

Dimensions: Length overall / water x beam x draught
731.30 ft / 720.00 ft x 82.00 ft x 24.45 ft (normal load)
222.90 m / 219.46 m x 24.99 m x 7.45 m

Armament:
8 - 4.13" / 105 mm guns (4x2 guns), 34.00lbs / 15.42kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread, 2 raised mounts - superfiring
16 - 2.95" / 75.0 mm guns (8x2 guns), 12.00lbs / 5.44kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
32 - 1.57" / 40.0 mm guns (4x8 guns), 2.00lbs / 0.91kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
30 - 0.98" / 25.0 mm guns (10x3 guns), 0.57lbs / 0.26kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
32 - 0.52" / 13.2 mm guns (4x8 guns), 0.09lbs / 0.04kg shells, 1939 Model
Machine guns in deck mounts
on side ends, evenly spread
Weight of broadside 548 lbs / 249 kg
Shells per gun, main battery: 500

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 530.00 ft / 161.54 m 11.50 ft / 3.51 m
Ends: Unarmoured
Main Belt covers 113% of normal length

- Torpedo Bulkhead:
2.00" / 51 mm 530.00 ft / 161.54 m 22.44 ft / 6.84 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -

- Armour deck: 2.50" / 64 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 148,715 shp / 110,942 Kw = 34.00 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 3,378 tons

Complement:
923 - 1,200

Cost:
£7.727 million / $30.909 million

Distribution of weights at normal displacement:
Armament: 71 tons, 0.3%
Armour: 4,254 tons, 18.8%
- Belts: 1,260 tons, 5.6%
- Torpedo bulkhead: 880 tons, 3.9%
- Armament: 79 tons, 0.3%
- Armour Deck: 1,983 tons, 8.7%
- Conning Tower: 52 tons, 0.2%
Machinery: 4,024 tons, 17.8%
Hull, fittings & equipment: 6,800 tons, 30.0%
Fuel, ammunition & stores: 2,518 tons, 11.1%
Miscellaneous weights: 5,000 tons, 22.1%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
29,896 lbs / 13,561 Kg = 846.4 x 4.1 " / 105 mm shells or 4.3 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 4.4 ft / 1.4 m
Roll period: 16.4 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.05
Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.550
Length to Beam Ratio: 8.78 : 1
'Natural speed' for length: 30.76 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 20.64 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (20%): 21.25 ft / 6.48 m
- Mid (50%): 21.25 ft / 6.48 m
- Quarterdeck (15%): 21.25 ft / 6.48 m
- Stern: 21.25 ft / 6.48 m
- Average freeboard: 21.95 ft / 6.69 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 112.8%
- Above water (accommodation/working, high = better): 188.0%
Waterplane Area: 42,878 Square feet or 3,984 Square metres
Displacement factor (Displacement / loading): 127%
Structure weight / hull surface area: 111 lbs/sq ft or 543 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.04
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent

Planes: 4225 tons (= 65 planes)
Extras: 775 tons

Hiyo, Japan Carrier laid down 1940


Displacement:
47,000 t light; 48,381 t standard; 52,985 t normal; 56,668 t full load

Dimensions: Length overall / water x beam x draught
905.69 ft / 876.00 ft x 108.00 ft x 35.00 ft (normal load)
276.06 m / 267.00 m x 32.92 m x 10.67 m

Armament:
8 - 5.00" / 127 mm guns (4x2 guns), 55.12lbs / 25.00kg shells, 1940 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 4.13" / 105 mm guns (8x2 guns), 34.00lbs / 15.42kg shells, 1940 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships
32 - 1.57" / 40.0 mm guns (4x8 guns), 2.00lbs / 0.91kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 3 raised mounts
51 - 0.98" / 25.0 mm guns (17x3 guns), 0.57lbs / 0.26kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
32 - 0.52" / 13.2 mm guns (4x8 guns), 0.09lbs / 0.04kg shells, 1940 Model
Machine guns in deck mounts
on centreline ends, evenly spread
Weight of broadside 1,081 lbs / 490 kg
Shells per gun, main battery: 450

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 650.00 ft / 198.12 m 14.00 ft / 4.27 m
Ends: Unarmoured
Main Belt covers 114% of normal length

- Torpedo Bulkhead:
2.75" / 70 mm 650.00 ft / 198.12 m 33.00 ft / 10.06 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
3rd: 1.00" / 25 mm 1.00" / 25 mm -
4th: 1.00" / 25 mm 1.00" / 25 mm -
5th: 0.50" / 13 mm 0.50" / 13 mm -

- Armour deck: 3.25" / 83 mm, Conning tower: 2.75" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 165,587 shp / 123,528 Kw = 31.00 kts
Range 15,000nm at 15.00 kts
Bunker at max displacement = 8,287 tons

Complement:
1,746 - 2,270

Cost:
£14.450 million / $57.801 million

Distribution of weights at normal displacement:
Armament: 171 tons, 0.3%
Armour: 8,855 tons, 16.7%
- Belts: 2,269 tons, 4.3%
- Torpedo bulkhead: 2,183 tons, 4.1%
- Armament: 147 tons, 0.3%
- Armour Deck: 4,173 tons, 7.9%
- Conning Tower: 84 tons, 0.2%
Machinery: 4,427 tons, 8.4%
Hull, fittings & equipment: 13,546 tons, 25.6%
Fuel, ammunition & stores: 5,986 tons, 11.3%
Miscellaneous weights: 20,000 tons, 37.7%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
71,598 lbs / 32,476 Kg = 1,145.6 x 5.0 " / 127 mm shells or 11.2 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 6.5 ft / 2.0 m
Roll period: 17.9 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.03
Seaboat quality (Average = 1.00): 1.37

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.560
Length to Beam Ratio: 8.11 : 1
'Natural speed' for length: 34.11 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 38
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 4.00 ft / 1.22 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 44.50 ft / 13.56 m
- Forecastle (15%): 23.50 ft / 7.16 m
- Mid (55%): 23.50 ft / 7.16 m
- Quarterdeck (15%): 23.50 ft / 7.16 m
- Stern: 23.50 ft / 7.16 m
- Average freeboard: 24.76 ft / 7.55 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 88.1%
- Above water (accommodation/working, high = better): 177.9%
Waterplane Area: 69,406 Square feet or 6,448 Square metres
Displacement factor (Displacement / loading): 136%
Structure weight / hull surface area: 139 lbs/sq ft or 680 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.00
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

- 14400 tons for 120 planes (120 tons per aircraft) or 80 jet era aircraft (180 tons per jet)
- 750 tons for 30 spare planes in crates (25 tons per aircraft)
- 1000 tons additional aircraft ordnance
- 480 tons for spare parts (4 tons per operational aircraft)
- 390 tons for repair shop (3 tons per operational aircraft, 1 ton per spare aircraft)
- 60 tons for hydraulic catapults (20 tons per catapult)
- 140 tons for elevators
- 240 tons for flight operations center (2 tons per operational aircraft)
- 120 tons for briefing room (1 ton per operational aircraft)
- 250 tons for flagship facilities
- 100 tons for carrier command center
- 440 tons for fire control and fire control center
- 200 tons for radar systems
- 120 tons for an additional 3360 105mm rounds (for 750 rounds per gun)
- 25 tons for an additional 14720 40mm rounds (for 1000 rounds per gun)
- 35 tons for an additional 48960 25mm rounds (for 1500 rounds per gun)
- 10 tons for an additional 62720 13.2mm rounds (for 2500 rounds per gun)
- 470 tons for damage control and fire suppression systems (1 ton per 100 tons light displacement)
- 118 tons emergency diesel generators (1 ton per 400 tons light displacement)
- 470 tons for air condition system (1 ton per 100 tons light displacement)
- 182 tons for degaussing coils (1 ton per 5 feet of length (oa))

Nurikabe, Japan Carrier laid down 1944
Ships: 2. Nurikabe, Ittanmomen.

Displacement:
52,000 t light; 54,295 t standard; 59,042 t normal; 62,840 t full load

Dimensions: Length overall / water x beam x draught
937.09 ft / 910.00 ft x 112.00 ft x 35.00 ft (normal load)
285.63 m / 277.37 m x 34.14 m x 10.67 m

Armament:
8 - 5.00" / 127 mm guns (4x2 guns), 55.12lbs / 25.00kg shells, 1944 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships, 2 raised mounts - superfiring
16 - 2.95" / 75.0 mm guns (8x2 guns), 12.00lbs / 5.44kg shells, 1944 Model
Automatic rapid fire guns in deck mounts with hoists
on side ends, evenly spread
72 - 1.57" / 40.0 mm guns (12x6 guns), 2.00lbs / 0.91kg shells, 1944 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
64 - 0.98" / 25.0 mm guns (16x4 guns), 0.57lbs / 0.26kg shells, 1944 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
48 - 0.98" / 25.0 mm guns (12x4 guns), 0.00lbs / 0.00kg shells, 1944 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 813 lbs / 369 kg
Shells per gun, main battery: 1,990
336 - 4.7" / 120 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 600.00 ft / 182.88 m 14.00 ft / 4.27 m
Ends: Unarmoured
Main Belt covers 101% of normal length

- Torpedo Bulkhead:
3.00" / 76 mm 600.00 ft / 182.88 m 33.00 ft / 10.06 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 1.00" / 25 mm - 1.00" / 25 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -
5th: 0.50" / 13 mm - -

- Armour deck: 4.00" / 102 mm, Conning tower: 2.75" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 156,514 shp / 116,759 Kw = 30.00 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 8,546 tons

Complement:
1,893 - 2,461

Cost:
£16.743 million / $66.974 million

Distribution of weights at normal displacement:
Armament: 130 tons, 0.2%
Armour: 10,154 tons, 17.2%
- Belts: 2,142 tons, 3.6%
- Torpedo bulkhead: 2,198 tons, 3.7%
- Armament: 89 tons, 0.2%
- Armour Deck: 5,636 tons, 9.5%
- Conning Tower: 90 tons, 0.2%
Machinery: 3,997 tons, 6.8%
Hull, fittings & equipment: 15,219 tons, 25.8%
Fuel, ammunition & stores: 7,042 tons, 11.9%
Miscellaneous weights: 22,500 tons, 38.1%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
87,525 lbs / 39,701 Kg = 1,400.4 x 5.0 " / 127 mm shells or 13.9 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 6.8 ft / 2.1 m
Roll period: 18.0 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0.02
Seaboat quality (Average = 1.00): 1.56

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.579
Length to Beam Ratio: 8.13 : 1
'Natural speed' for length: 34.69 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 39
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 4.00 ft / 1.22 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 40.00 ft / 12.19 m
- Forecastle (15%): 25.60 ft / 7.80 m
- Mid (55%): 25.60 ft / 7.80 m
- Quarterdeck (15%): 25.60 ft / 7.80 m
- Stern: 25.60 ft / 7.80 m
- Average freeboard: 26.46 ft / 8.07 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 82.5%
- Above water (accommodation/working, high = better): 173.6%
Waterplane Area: 76,165 Square feet or 7,076 Square metres
Displacement factor (Displacement / loading): 142%
Structure weight / hull surface area: 144 lbs/sq ft or 701 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 0.99
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather


12x4 25mm mounts (5th gun) simmed for AA Rocket launcher mount.
12cm Rockets simmed as Torpedoes.

Actual rounds per gun
5" => 500 rpg = 122 tons
75mm => 1500 rpg = 214 tons
40mm => 2000 rpg = 262 tons
25mm => 3000 rpg = 515 tons
Total magazine weight: 1113 tons = 1990 rounds

52000
- 16641tons for 129 planes (129 tons per aircraft) or 86 jet era aircraft (193.5 tons per jet)
- 750 tons for 30 spare planes in crates (25 tons per aircraft)
- 1000 tons additional aircraft ordnance
- 500 tons for spare parts (4 tons per operational aircraft)
- 405 tons for repair shop (3 tons per operational aircraft, 1 ton per spare aircraft)
- 60 tons for hydraulic catapults (20 tons per catapult)
- 140 tons for elevators
- 250 tons for flight operations center (2 tons per operational aircraft)
- 129 tons for briefing room (1 ton per operational aircraft)
- 250 tons for flagship facilities
- 100 tons for carrier command center
- 308 tons for fire control and fire control center
- 200 tons for radar systems
- 520 tons for damage control and fire suppression systems (1 ton per 100 tons light displacement)
- 130 tons emergency diesel generators (1 ton per 400 tons light displacement)
- 520 tons for air condition system (1 ton per 100 tons light displacement)
- 188 tons for degaussing coils (1 ton per 5 feet of length (oa))
- 132 for mount improvements
--- 60 tons for 5" mounts
--- 32 tons for 75mm mounts
--- 24 tons for 40mm mounts
--- 16 tons for 25mm mounts
- 75 tons for 12x28 12 cm AA Rocket launchers
- 202 tons for crew comfort.
Total: 22500

Ishinagenjo, Japan Carrier laid down 1948


Displacement:
72,345 t light; 74,503 t standard; 85,784 t normal; 94,810 t full load

Dimensions: Length overall / water x beam x draught
1,013.50 ft / 940.00 ft x 124.00 ft (Bulges 134.00 ft) x 37.00 ft (normal load)
308.92 m / 286.51 m x 37.80 m (Bulges 40.84 m) x 11.28 m

Armament:
24 - 2.95" / 75.0 mm guns (12x2 guns), 12.00lbs / 5.44kg shells, 1948 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread, all raised mounts
36 - 1.57" / 40.0 mm guns (6x6 guns), 2.00lbs / 0.91kg shells, 1948 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
128 - 0.98" / 25.0 mm guns (32x4 guns), 0.57lbs / 0.26kg shells, 1948 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
48 - 0.98" / 25.0 mm guns (12x4 guns), 0.00lbs / 0.00kg shells, 1948 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 433 lbs / 196 kg
Shells per gun, main battery: 1,440
336 - 4.7" / 120 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.50" / 114 mm 665.00 ft / 202.69 m 12.00 ft / 3.66 m
Ends: Unarmoured
Upper: 2.00" / 51 mm 665.00 ft / 202.69 m 27.00 ft / 8.23 m
Main Belt covers 109 % of normal length

- Torpedo Bulkhead and Bulges:
3.75" / 95 mm 665.00 ft / 202.69 m 37.00 ft / 11.28 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - 1.00" / 25 mm
2nd: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -

- Armour deck: 1.68" / 43 mm, Conning tower: 2.75" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 201,634 shp / 150,419 Kw = 30.00 kts
Range 20,000nm at 18.00 kts
Bunker at max displacement = 20,307 tons

Complement:
2,506 - 3,258

Cost:
£24.429 million / $97.715 million

Distribution of weights at normal displacement:
Armament: 66 tons, 0.1 %
Armour: 9,510 tons, 11.1 %
- Belts: 3,043 tons, 3.5 %
- Torpedo bulkhead: 3,414 tons, 4.0 %
- Armament: 52 tons, 0.1 %
- Armour Deck: 2,887 tons, 3.4 %
- Conning Tower: 115 tons, 0.1 %
Machinery: 4,928 tons, 5.7 %
Hull, fittings & equipment: 20,891 tons, 24.4 %
Fuel, ammunition & stores: 13,440 tons, 15.7 %
Miscellaneous weights: 36,950 tons, 43.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
123,551 lbs / 56,042 Kg = 9,598.3 x 3.0 " / 75 mm shells or 22.7 torpedoes
Stability (Unstable if below 1.00): 1.09
Metacentric height 8.2 ft / 2.5 m
Roll period: 19.7 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.81

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.644
Length to Beam Ratio: 7.01 : 1
'Natural speed' for length: 35.46 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 39
Bow angle (Positive = bow angles forward): 40.92 degrees
Stern overhang: 21.50 ft / 6.55 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 60.00 ft / 18.29 m
- Forecastle (25 %): 60.00 ft / 18.29 m (28.00 ft / 8.53 m aft of break)
- Mid (50 %): 28.00 ft / 8.53 m
- Quarterdeck (15 %): 28.00 ft / 8.53 m
- Stern: 28.00 ft / 8.53 m
- Average freeboard: 36.00 ft / 10.97 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 80.3 %
- Above water (accommodation/working, high = better): 177.4 %
Waterplane Area: 92,654 Square feet or 8,608 Square metres
Displacement factor (Displacement / loading): 151 %
Structure weight / hull surface area: 156 lbs/sq ft or 760 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.25
- Overall: 1.00
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

12x4 25mm mounts (4th gun) simmed for AA Rocket launcher mount.
12cm Rockets simmed as Torpedoes.
75mm => 1500 rpg = 240 tons
40mm => 2000 rpg = 80 tons
25mm => 3000 rpg = 122 tons
Total magazine weight: 442 tons = 1440 rounds

Actual range: 17500 nm @ 18 knots (= max 17803 tons bunker).
1234 tons of bunker fuel for simming extra aviation fuel (= 1,607,522 liters @ 0.78kg/l).
Baseline aviation fuel = 883,263 liters (part of the misc for planes). (*)
Total aviation fuel in tanks = 2,490,785 liters
1200 tons of bunker fuel for simming extra aircraft ammunition.

3.5" armored flight deck over the hangar (5424 tons miscellaneous weights) (**)
2" remainder of armored flight deck (3431 tons miscellaneous weights) (***)
1.75-2.5" hangar deck (4489 tons miscellaneous weights) (****)
1.25-1.75" protective deck (= deck armor) (*****)
940x33 2" Hangar deck side armor (2295 tons miscellaneous weights) (******)
Upper belt connected to the bottom of the hangar deck side armor.
TBH - Bulge: 0.75", Outer bulkhead: 0.7", Middle bulkhead: 0.4", Inner bulkhead: 0.4", Holding bulkhead: 1.5".

Correct survivability: 174,560 lbs / 79,179 Kg = 13,561.0 x 3.0 " / 75 mm shells or 41.8 torpedoes (*******)
Correct space - hull below water (magazines/engines, low = better): 56.8 % (*******)


- 11025 tons for 70 aircraft (157.5 tons per aircraft).
- 13610 tons for armored decks located much higher in the ship than the baseline deck armor.
- 2295 tons for hangar side armor located higher in the ship than the baseline side armor.
- 750 tons for 20 spare planes in crates (37.5 tons per aircraft).
- 560 tons for spare parts (8 tons per operational aircraft).
- 460 tons for repair shop (6 tons per operational aircraft, 2 ton per spare aircraft).
- 750 tons for steam catapults (250 tons per catapult, 2 bow and 1 port side).
- 300 tons for jet blast deflectors+deck cooling (100 tons per set, 2 bow and 1 port side)
- 1300 tons for flight deck port overhang and support.
- 700 tons for flight deck starboard overhang and support.
- 300 tons for elevators.
- 100 tons for landing aid system.
- 280 tons for flight operations center (4 tons per operational aircraft).
- 140 tons for briefing room (2 ton per operational aircraft).
- 250 tons for flagship facilities.
- 100 tons for carrier command center.
- 350 tons for fire control and fire control center.
- 400 tons for radar systems and sonar.
- 4 tons for 4 paravanes (2 port, 2 starboard).
- 724 tons for damage control and fire suppression systems (1 ton per 100 tons light displacement).
- 181 tons emergency diesel generators (1 ton per 400 tons light displacement).
- 724 tons for air condition system (1 ton per 100 tons light displacement).
- 300 tons for enhanced fuel pumping capacity.
- 203 tons for degaussing coils (1 ton per 5 feet of length (oa)).
- 92 for mount improvements.
--- 48 tons for 75mm mounts.
--- 12 tons for 40mm mounts.
--- 32 tons for 25mm mounts.
- 75 tons for 12x28 12 cm AA Rocket launchers.
- 977 tons for crew comforts (kept short this time instead of the detailed stuff).
Total: 36950 tons.

(*) Based on wiki info on USS Essex's SCB-27 upgrade.
(**) Calculated using SS3. Based on a 134 ft wide ship and 700 ft long hangar.
(***) Rough estimate needed for the remaining flightdeck area not over the hangar.
(****) Calculated using SS3. Based on a 134 ft wide ship and 700 ft long hangar. Hangar floor 2.5", rest of ship's length 1.75".
(*****) Calculated using SS3. Forward 15% and aft 15% of the ship's length 1.25", center part 1.75". 1.68" average used in sim to get required weight.
(******) Calculated using SS3. Based on a 134 ft wide ship.
(*******) Based on sim with miscellaneous weight armor being simmed as actual armor and a 1.09 stability.