Cruisers Class 1

[Walter]

1st Class Cruiser Size Comparison.

Top to bottom: Asama, Yakumo, Azuma, Izumo, Kasuga, Tsukuba, Kurama.

[Walter]

Asama, Japan Cruiser Class 1 laid down 1896
Redesignated as Coast Defense Ship Class 1 as of 1/1/1917.



Ships: Asama, Tokiwa
Displacement:
   10,258 t light; 10,749 t standard; 11,885 t normal; 12,794 t full load

Dimensions: Length overall / water x beam x draught
   419.95 ft / 419.95 ft x 67.09 ft x 24.61 ft (normal load)
   128.00 m / 128.00 m x 20.45 m  x 7.50 m

Armament:
     4 - 8.00" / 203 mm guns (2x2 guns), 256.00lbs / 116.12kg shells, 1896 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
     14 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1896 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     12 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1896 Model
     Quick firing guns in deck mounts
     on side, evenly spread
     4 guns in hull casemates - Limited use in all but light seas
     7 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1896 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 2,720 lbs / 1,234 kg
   Shells per gun, main battery: 150
   5 - 17.7" / 450 mm above water torpedoes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.09" / 180 mm   337.93 ft / 103.00 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
   Upper:   4.92" / 125 mm   337.93 ft / 103.00 m   8.01 ft / 2.44 m
     Main Belt covers 124 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   3.15" / 80 mm      5.91" / 150 mm
   2nd:   5.91" / 150 mm         -         3.94" / 100 mm
   3rd:   1.18" / 30 mm   0.79" / 20 mm            -

  - Armour deck: 1.97" / 50 mm, Conning tower: 14.17" / 360 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 21,982 ihp / 16,399 Kw = 21.00 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 2,045 tons (100% coal)

Complement:
   568 - 739

Cost:
   £1.158 million / $4.630 million

Distribution of weights at normal displacement:
   Armament: 340 tons, 2.9 %
   Armour: 2,996 tons, 25.2 %
      - Belts: 1,540 tons, 13.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 546 tons, 4.6 %
      - Armour Deck: 750 tons, 6.3 %
      - Conning Tower: 159 tons, 1.3 %
   Machinery: 3,664 tons, 30.8 %
   Hull, fittings & equipment: 3,159 tons, 26.6 %
   Fuel, ammunition & stores: 1,627 tons, 13.7 %
   Miscellaneous weights: 100 tons, 0.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,083 lbs / 3,213 Kg = 27.7 x 8.0 " / 203 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 3.5 ft / 1.1 m
   Roll period: 15.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.32
   Seaboat quality  (Average = 1.00): 1.25

Hull form characteristics:
   Hull has low quarterdeck
   Block coefficient: 0.600
   Length to Beam Ratio: 6.26 : 1
   'Natural speed' for length: 20.49 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 80
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      18.04 ft / 5.50 m
      - Forecastle (20 %):   14.11 ft / 4.30 m
      - Mid (50 %):      14.11 ft / 4.30 m
      - Quarterdeck (7 %):   9.84 ft / 3.00 m (14.11 ft / 4.30 m before break)
      - Stern:      9.84 ft / 3.00 m
      - Average freeboard:   14.12 ft / 4.31 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 123.1 %
      - Above water (accommodation/working, high = better): 89.0 %
   Waterplane Area: 20,607 Square feet or 1,914 Square metres
   Displacement factor (Displacement / loading): 90 %
   Structure weight / hull surface area: 106 lbs/sq ft or 516 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.72
      - Overall: 1.02
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Walter]

Yakumo, Japan Cruiser Class 1 laid down 1898
Redesignated as Coast Defense Ship Class 1 as of 1/1/1917.



Displacement:
   9,142 t light; 9,586 t standard; 10,613 t normal; 11,435 t full load

Dimensions: Length overall / water x beam x draught
   419.95 ft / 419.95 ft x 64.21 ft x 23.75 ft (normal load)
   128.00 m / 128.00 m x 19.57 m  x 7.24 m

Armament:
     4 - 8.00" / 203 mm guns (2x2 guns), 256.00lbs / 116.12kg shells, 1898 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
     12 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1898 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     12 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1898 Model
     Quick firing guns in deck mounts
     on side, evenly spread
     4 guns in hull casemates - Limited use in all but light seas
     7 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1898 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 2,504 lbs / 1,136 kg
   Shells per gun, main battery: 150
   5 - 17.7" / 450 mm above water torpedoes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.69" / 170 mm   328.08 ft / 100.00 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
   Upper:   4.92" / 125 mm   328.08 ft / 100.00 m   8.01 ft / 2.44 m
     Main Belt covers 120 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   3.15" / 80 mm      5.91" / 150 mm
   2nd:   5.91" / 150 mm         -         1.97" / 50 mm
   3rd:   1.18" / 30 mm   0.79" / 20 mm            -

  - Armour deck: 2.44" / 62 mm, Conning tower: 14.96" / 380 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 18,405 ihp / 13,730 Kw = 20.50 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 1,849 tons (100% coal)

Complement:
   522 - 679

Cost:
   £0.998 million / $3.994 million

Distribution of weights at normal displacement:
   Armament: 313 tons, 2.9 %
   Armour: 2,966 tons, 27.9 %
      - Belts: 1,446 tons, 13.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 490 tons, 4.6 %
      - Armour Deck: 874 tons, 8.2 %
      - Conning Tower: 156 tons, 1.5 %
   Machinery: 2,969 tons, 28.0 %
   Hull, fittings & equipment: 2,794 tons, 26.3 %
   Fuel, ammunition & stores: 1,472 tons, 13.9 %
   Miscellaneous weights: 100 tons, 0.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,148 lbs / 3,242 Kg = 27.9 x 8.0 " / 203 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 3.1 ft / 1.0 m
   Roll period: 15.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.34
   Seaboat quality  (Average = 1.00): 1.29

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.580
   Length to Beam Ratio: 6.54 : 1
   'Natural speed' for length: 20.49 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 78
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      13.12 ft / 4.00 m
      - Forecastle (20 %):   13.12 ft / 4.00 m
      - Mid (50 %):      13.12 ft / 4.00 m
      - Quarterdeck (7 %):   13.12 ft / 4.00 m
      - Stern:      13.12 ft / 4.00 m
      - Average freeboard:   13.12 ft / 4.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 114.8 %
      - Above water (accommodation/working, high = better): 84.3 %
   Waterplane Area: 19,355 Square feet or 1,798 Square metres
   Displacement factor (Displacement / loading): 92 %
   Structure weight / hull surface area: 99 lbs/sq ft or 485 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.58
      - Overall: 1.01
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Walter]

Azuma, Japan Cruiser Class 1 laid down 1898
Redesignated as Coast Defense Ship Class 1 as of 1/1/1917.



Displacement:
   8,899 t light; 9,345 t standard; 10,432 t normal; 11,302 t full load

Dimensions: Length overall / water x beam x draught
   432.09 ft / 432.09 ft x 64.21 ft (Bulges 68.70 ft) x 23.65 ft (normal load)
   131.70 m / 131.70 m x 19.57 m (Bulges 20.94 m)  x 7.21 m

Armament:
     4 - 8.00" / 203 mm guns (2x2 guns), 256.00lbs / 116.12kg shells, 1898 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
     12 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1898 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     12 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1898 Model
     Quick firing guns in deck mounts
     on side, evenly spread
     4 guns in hull casemates - Limited use in all but light seas
     12 - 2.24" / 57.0 mm guns (7 mounts), 5.65lbs / 2.56kg shells, 1898 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 2,550 lbs / 1,157 kg
   Shells per gun, main battery: 150
   5 - 17.7" / 450 mm above water torpedoes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.69" / 170 mm   328.08 ft / 100.00 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
   Upper:   4.92" / 125 mm   328.08 ft / 100.00 m   8.01 ft / 2.44 m
     Main Belt covers 117 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   3.15" / 80 mm      5.91" / 150 mm
   2nd:   5.91" / 150 mm         -         1.97" / 50 mm
   3rd:   1.18" / 30 mm   0.79" / 20 mm            -

  - Armour deck: 2.44" / 62 mm, Conning tower: 14.17" / 360 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 16,125 ihp / 12,029 Kw = 20.00 kts
   Range 7,500nm at 10.00 kts
   Bunker at max displacement = 1,957 tons (100% coal)

Complement:
   515 - 670

Cost:
   £0.943 million / $3.773 million

Distribution of weights at normal displacement:
   Armament: 319 tons, 3.1 %
   Armour: 2,936 tons, 28.1 %
      - Belts: 1,447 tons, 13.9 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 493 tons, 4.7 %
      - Armour Deck: 850 tons, 8.1 %
      - Conning Tower: 146 tons, 1.4 %
   Machinery: 2,601 tons, 24.9 %
   Hull, fittings & equipment: 2,944 tons, 28.2 %
   Fuel, ammunition & stores: 1,533 tons, 14.7 %
   Miscellaneous weights: 100 tons, 1.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,784 lbs / 3,984 Kg = 34.3 x 8.0 " / 203 mm shells or 1.5 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 3.8 ft / 1.2 m
   Roll period: 14.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.26
   Seaboat quality  (Average = 1.00): 1.51

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.520
   Length to Beam Ratio: 6.29 : 1
   'Natural speed' for length: 20.79 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      13.45 ft / 4.10 m
      - Forecastle (20 %):   13.45 ft / 4.10 m
      - Mid (50 %):      13.45 ft / 4.10 m
      - Quarterdeck (7 %):   13.45 ft / 4.10 m
      - Stern:      13.45 ft / 4.10 m
      - Average freeboard:   13.45 ft / 4.10 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 105.9 %
      - Above water (accommodation/working, high = better): 85.4 %
   Waterplane Area: 18,827 Square feet or 1,749 Square metres
   Displacement factor (Displacement / loading): 97 %
   Structure weight / hull surface area: 104 lbs/sq ft or 509 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.62
      - Overall: 1.02
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Walter]

Izumo, Japan Cruiser Class 1 laid down 1898
Redesignated as Coast Defense Ship Class 1 as of 1/1/1917.



Ships: Izumo, Iwate
Displacement:
   9,821 t light; 10,302 t standard; 11,375 t normal; 12,233 t full load

Dimensions: Length overall / water x beam x draught
   433.99 ft / 433.99 ft x 68.70 ft x 24.28 ft (normal load)
   132.28 m / 132.28 m x 20.94 m  x 7.40 m

Armament:
     4 - 8.00" / 203 mm guns (2x2 guns), 256.00lbs / 116.12kg shells, 1898 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
     14 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1898 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     12 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1898 Model
     Quick firing guns in deck mounts
     on side, evenly spread
     4 guns in hull casemates - Limited use in any sea
     8 - 1.85" / 47.0 mm guns (7 mounts), 3.17lbs / 1.44kg shells, 1898 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 2,723 lbs / 1,235 kg
   Shells per gun, main battery: 150
   5 - 17.7" / 450 mm above water torpedoes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6.89" / 175 mm   328.08 ft / 100.00 m   9.84 ft / 3.00 m
   Ends:   Unarmoured
   Upper:   4.92" / 125 mm   328.08 ft / 100.00 m   8.01 ft / 2.44 m
     Main Belt covers 116 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   3.15" / 80 mm      5.91" / 150 mm
   2nd:   5.91" / 150 mm         -         3.94" / 100 mm
   3rd:   1.18" / 30 mm   0.79" / 20 mm            -

  - Armour deck: 2.64" / 67 mm, Conning tower: 14.96" / 380 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 19,783 ihp / 14,758 Kw = 20.75 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 1,931 tons (100% coal)

Complement:
   549 - 715

Cost:
   £1.076 million / $4.306 million

Distribution of weights at normal displacement:
   Armament: 340 tons, 3.0 %
   Armour: 3,188 tons, 28.0 %
      - Belts: 1,484 tons, 13.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 525 tons, 4.6 %
      - Armour Deck: 1,015 tons, 8.9 %
      - Conning Tower: 163 tons, 1.4 %
   Machinery: 3,191 tons, 28.1 %
   Hull, fittings & equipment: 3,002 tons, 26.4 %
   Fuel, ammunition & stores: 1,554 tons, 13.7 %
   Miscellaneous weights: 100 tons, 0.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,352 lbs / 3,335 Kg = 28.7 x 8.0 " / 203 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 3.5 ft / 1.1 m
   Roll period: 15.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.26
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.550
   Length to Beam Ratio: 6.32 : 1
   'Natural speed' for length: 20.83 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 83
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      11.98 ft / 3.65 m
      - Forecastle (20 %):   11.98 ft / 3.65 m
      - Mid (50 %):      11.98 ft / 3.65 m
      - Quarterdeck (7 %):   11.98 ft / 3.65 m
      - Stern:      11.98 ft / 3.65 m
      - Average freeboard:   11.98 ft / 3.65 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 115.3 %
      - Above water (accommodation/working, high = better): 79.3 %
   Waterplane Area: 20,808 Square feet or 1,933 Square metres
   Displacement factor (Displacement / loading): 92 %
   Structure weight / hull surface area: 103 lbs/sq ft or 501 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.44
      - Overall: 1.01
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Walter]

Kasuga, Japan Cruiser Class 1 laid down 1902
Redesignated as Coast Defense Ship Class 1 as of 1/1/1917.



Ships: Kasuga, Nisshin
Displacement:
   7,111 t light; 7,532 t standard; 8,353 t normal; 9,010 t full load

Dimensions: Length overall / water x beam x draught
   356.96 ft / 356.96 ft x 62.01 ft x 24.02 ft (normal load)
   108.80 m / 108.80 m x 18.90 m  x 7.32 m

Armament:
     1 - 10.00" / 254 mm guns in single mounts, 500.00lbs / 226.80kg shells, 1902 Model
     Breech loading gun in a turret (on a barbette)
     on centreline forward
     2 - 8.00" / 203 mm guns (1x2 guns), 256.00lbs / 116.12kg shells, 1902 Model
     Breech loading guns in a turret (on a barbette)
     on centreline aft
     14 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1902 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     10 guns in hull casemates - Limited use in heavy seas
     10 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1902 Model
     Quick firing guns in deck mounts
     on side, evenly spread
     4 guns in hull casemates - Limited use in heavy seas
     6 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1902 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 2,678 lbs / 1,215 kg
   Shells per gun, main battery: 150
   4 - 17.7" / 450 mm above water torpedoes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.91" / 150 mm   328.08 ft / 100.00 m   11.48 ft / 3.50 m
   Ends:   Unarmoured
     Main Belt covers 141 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   3.15" / 80 mm      5.91" / 150 mm
   2nd:   5.91" / 150 mm   3.15" / 80 mm      5.91" / 150 mm
   3rd:   5.91" / 150 mm         -         1.97" / 50 mm
   4th:   1.18" / 30 mm   0.79" / 20 mm            -

  - Armour deck: 1.50" / 38 mm, Conning tower: 5.91" / 150 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 15,340 ihp / 11,444 Kw = 20.00 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 1,479 tons (100% coal)

Complement:
   436 - 567

Cost:
   £0.855 million / $3.422 million

Distribution of weights at normal displacement:
   Armament: 335 tons, 4.0 %
   Armour: 1,902 tons, 22.8 %
      - Belts: 893 tons, 10.7 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 528 tons, 6.3 %
      - Armour Deck: 428 tons, 5.1 %
      - Conning Tower: 52 tons, 0.6 %
   Machinery: 2,324 tons, 27.8 %
   Hull, fittings & equipment: 2,450 tons, 29.3 %
   Fuel, ammunition & stores: 1,243 tons, 14.9 %
   Miscellaneous weights: 100 tons, 1.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5,815 lbs / 2,637 Kg = 11.6 x 10.0 " / 254 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 3.7 ft / 1.1 m
   Roll period: 13.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.43
   Seaboat quality  (Average = 1.00): 1.51

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.550
   Length to Beam Ratio: 5.76 : 1
   'Natural speed' for length: 18.89 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.40 ft / 5.00 m
      - Forecastle (20 %):   16.40 ft / 5.00 m
      - Mid (50 %):      16.40 ft / 5.00 m
      - Quarterdeck (7 %):   16.40 ft / 5.00 m
      - Stern:      16.40 ft / 5.00 m
      - Average freeboard:   16.40 ft / 5.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 122.7 %
      - Above water (accommodation/working, high = better): 100.9 %
   Waterplane Area: 15,447 Square feet or 1,435 Square metres
   Displacement factor (Displacement / loading): 90 %
   Structure weight / hull surface area: 102 lbs/sq ft or 497 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 2.83
      - Overall: 1.04
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Walter]

Tsukuba, Japan Cruiser Class 1 laid down 1904
Redesignated as Battlecruiser as of 1/1/1912.



Ships: Tsukuba, Ikoma
Displacement:
   13,001 t light; 13,784 t standard; 14,938 t normal; 15,861 t full load

Dimensions: Length overall / water x beam x draught
   439.96 ft / 439.96 ft x 75.46 ft x 26.25 ft (normal load)
   134.10 m / 134.10 m x 23.00 m  x 8.00 m

Armament:
     4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1904 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
     12 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1904 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     12 guns in hull casemates - Limited use in heavy seas
     12 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.91kg shells, 1904 Model
     Breech loading guns in deck mounts
     on side, evenly spread
     4 guns in hull casemates - Limited use in heavy seas
     4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1904 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 5,439 lbs / 2,467 kg
   Shells per gun, main battery: 150
   3 - 17.7" / 450 mm submerged torpedo tubes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.09" / 180 mm   328.08 ft / 100.00 m   11.15 ft / 3.40 m
   Ends:   3.94" / 100 mm   111.88 ft / 34.10 m   11.15 ft / 3.40 m
   Upper:   4.72" / 120 mm   328.08 ft / 100.00 m   8.20 ft / 2.50 m
     Main Belt covers 115 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   7.09" / 180 mm   3.94" / 100 mm      7.09" / 180 mm
   2nd:   5.91" / 150 mm   3.15" / 80 mm      5.91" / 150 mm
   3rd:   3.15" / 80 mm   1.57" / 40 mm            -
   4th:   1.18" / 30 mm   0.79" / 20 mm            -

  - Armour deck: 2.95" / 75 mm, Conning tower: 7.87" / 200 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 22,828 ihp / 17,030 Kw = 20.50 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 2,078 tons (100% coal)

Complement:
   675 - 878

Cost:
   £1.496 million / $5.984 million

Distribution of weights at normal displacement:
   Armament: 680 tons, 4.6 %
   Armour: 4,133 tons, 27.7 %
      - Belts: 1,834 tons, 12.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 869 tons, 5.8 %
      - Armour Deck: 1,326 tons, 8.9 %
      - Conning Tower: 103 tons, 0.7 %
   Machinery: 3,357 tons, 22.5 %
   Hull, fittings & equipment: 4,731 tons, 31.7 %
   Fuel, ammunition & stores: 1,937 tons, 13.0 %
   Miscellaneous weights: 100 tons, 0.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     11,827 lbs / 5,365 Kg = 13.7 x 12.0 " / 305 mm shells or 1.6 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 4.4 ft / 1.3 m
   Roll period: 15.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.57
   Seaboat quality  (Average = 1.00): 1.58

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.600
   Length to Beam Ratio: 5.83 : 1
   'Natural speed' for length: 20.98 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      22.97 ft / 7.00 m
      - Forecastle (20 %):   21.33 ft / 6.50 m
      - Mid (60 %):      21.33 ft / 6.50 m (14.76 ft / 4.50 m aft of break)
      - Quarterdeck (7 %):   14.76 ft / 4.50 m
      - Stern:      14.76 ft / 4.50 m
      - Average freeboard:   18.83 ft / 5.74 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 112.6 %
      - Above water (accommodation/working, high = better): 125.8 %
   Waterplane Area: 24,281 Square feet or 2,256 Square metres
   Displacement factor (Displacement / loading): 91 %
   Structure weight / hull surface area: 132 lbs/sq ft or 644 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 2.44
      - Overall: 1.06
   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
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Walter]

Ibuki, Japan Cruiser Class 1 laid down 1905
Redesignated as Battlecruiser as of 1/1/1912.



Ships: Kurama
Displacement:
   13,125 t light; 13,976 t standard; 15,092 t normal; 15,984 t full load

Dimensions: Length overall / water x beam x draught
   484.91 ft / 484.91 ft x 75.46 ft x 26.25 ft (normal load)
   147.80 m / 147.80 m x 23.00 m  x 8.00 m

Armament:
     4 - 12.00" / 305 mm guns (2x2 guns), 864.00lbs / 391.90kg shells, 1905 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
     8 - 8.00" / 203 mm guns (4x2 guns), 256.00lbs / 116.12kg shells, 1905 Model
     Breech loading guns in turrets (on barbettes)
     on side, all amidships
     12 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     4 guns in hull casemates - Limited use in any sea
     4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1905 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 6,191 lbs / 2,808 kg
   Shells per gun, main battery: 150
   3 - 17.7" / 450 mm submerged torpedo tubes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.09" / 180 mm   353.97 ft / 107.89 m   10.43 ft / 3.18 m
   Ends:   3.94" / 100 mm   130.91 ft / 39.90 m   10.43 ft / 3.18 m
   Upper:   4.72" / 120 mm   353.97 ft / 107.89 m   8.01 ft / 2.44 m
     Main Belt covers 112 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   7.09" / 180 mm   3.94" / 100 mm      7.09" / 180 mm
   2nd:   5.91" / 150 mm   3.15" / 80 mm      5.91" / 150 mm
   3rd:   3.15" / 80 mm   1.57" / 40 mm            -
   4th:   1.18" / 30 mm   0.79" / 20 mm            -

  - Armour deck: 2.95" / 75 mm, Conning tower: 7.87" / 200 mm

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 21,645 ihp / 16,147 Kw = 20.50 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 2,008 tons (90% coal)

Complement:
   680 - 885

Cost:
   £1.544 million / $6.177 million

Distribution of weights at normal displacement:
   Armament: 774 tons, 5.1 %
   Armour: 4,323 tons, 28.6 %
      - Belts: 1,878 tons, 12.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 946 tons, 6.3 %
      - Armour Deck: 1,395 tons, 9.2 %
      - Conning Tower: 104 tons, 0.7 %
   Machinery: 3,106 tons, 20.6 %
   Hull, fittings & equipment: 4,822 tons, 31.9 %
   Fuel, ammunition & stores: 1,967 tons, 13.0 %
   Miscellaneous weights: 100 tons, 0.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     10,331 lbs / 4,686 Kg = 12.0 x 12.0 " / 305 mm shells or 1.6 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 4.2 ft / 1.3 m
   Roll period: 15.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.40
   Seaboat quality  (Average = 1.00): 1.15

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.550
   Length to Beam Ratio: 6.43 : 1
   'Natural speed' for length: 22.02 kts
   Power going to wave formation at top speed: 46 %
   Trim (Max stability = 0, Max steadiness = 100): 61
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.40 ft / 5.00 m
      - Forecastle (20 %):   16.40 ft / 5.00 m
      - Mid (40 %):      16.40 ft / 5.00 m (9.84 ft / 3.00 m aft of break)
      - Quarterdeck (7 %):   9.84 ft / 3.00 m
      - Stern:      9.84 ft / 3.00 m
      - Average freeboard:   12.47 ft / 3.80 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 110.5 %
      - Above water (accommodation/working, high = better): 83.3 %
   Waterplane Area: 25,536 Square feet or 2,372 Square metres
   Displacement factor (Displacement / loading): 90 %
   Structure weight / hull surface area: 136 lbs/sq ft or 664 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.37
      - Overall: 1.01
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

[Walter]

Akagi, Japan Cruiser Class 1 laid down 1918 (Engine 1916)

Displacement:
   36,300 t light; 37,833 t standard; 40,564 t normal; 42,748 t full load

Dimensions: Length overall / water x beam x draught
   870.74 ft / 856.00 ft x 94.00 ft x 32.00 ft (normal load)
   265.40 m / 260.91 m x 28.65 m  x 9.75 m

Armament:
      8 - 15.00" / 381 mm guns (4x2 guns), 1,687.50lbs / 765.44kg shells, 1918 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      12 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.91kg shells, 1918 Model
     Breech loading guns in deck mounts with hoists
     on side, evenly spread, 4 raised mounts
      6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1918 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships, all raised mounts - superfiring
      6 - 2.24" / 57.0 mm guns in single mounts, 5.65lbs / 2.56kg shells, 1918 Model
     Anti-aircraft guns in deck mounts with hoists
     on side, all amidships, all raised mounts - superfiring
      40 - 0.45" / 11.4 mm guns (4x10 guns), 0.05lbs / 0.02kg shells, 1918 Model
     Machine guns in deck mounts
     on side ends, evenly spread, all raised mounts - superfiring
   Weight of broadside 14,250 lbs / 6,463 kg
   Shells per gun, main battery: 90

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   549.54 ft / 167.50 m   14.11 ft / 4.30 m
   Ends:   Unarmoured
     Main Belt covers 99% of normal length

   - Torpedo Bulkhead:
      1.57" / 40 mm   549.54 ft / 167.50 m   29.86 ft / 9.10 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.8" / 375 mm   7.87" / 200 mm      13.8" / 350 mm
   2nd:   0.79" / 20 mm         -         0.79" / 20 mm
   3rd:   0.79" / 20 mm         -               -
   4th:   0.39" / 10 mm         -               -

   - Armour deck: 3.54" / 90 mm, Conning tower: 14.76" / 375 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 139,999 shp / 104,439 Kw = 30.00 kts
   Range 11,112nm at 12.00 kts
   Bunker at max displacement = 4,915 tons

Complement:
   1,428 - 1,857

Cost:
   £6.994 million / $27.976 million

Distribution of weights at normal displacement:
   Armament: 1,781 tons, 4.4%
   Armour: 12,793 tons, 31.5%
      - Belts: 4,504 tons, 11.1%
      - Torpedo bulkhead: 956 tons, 2.4%
      - Armament: 3,272 tons, 8.1%
      - Armour Deck: 3,686 tons, 9.1%
      - Conning Tower: 376 tons, 0.9%
   Machinery: 5,216 tons, 12.9%
   Hull, fittings & equipment: 15,510 tons, 38.2%
   Fuel, ammunition & stores: 4,263 tons, 10.5%
   Miscellaneous weights: 1,000 tons, 2.5%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     50,705 lbs / 22,999 Kg = 30.0 x 15.0 " / 381 mm shells or 6.7 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 5.4 ft / 1.7 m
   Roll period: 16.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.71
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.551
   Length to Beam Ratio: 9.11 : 1
   'Natural speed' for length: 29.26 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 41
   Bow angle (Positive = bow angles forward): 25.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      31.60 ft / 9.63 m
      - Forecastle (20%):   21.65 ft / 6.60 m
      - Mid (50%):      21.65 ft / 6.60 m
      - Quarterdeck (15%):   21.65 ft / 6.60 m
      - Stern:      21.65 ft / 6.60 m
      - Average freeboard:   22.45 ft / 6.84 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 98.5%
      - Above water (accommodation/working, high = better): 162.4%
   Waterplane Area: 56,228 Square feet or 5,224 Square metres
   Displacement factor (Displacement / loading): 105%
   Structure weight / hull surface area: 187 lbs/sq ft or 914 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - 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


250 tons ---- Main Fire Control
250 tons ---- Backup Fire Control
50 tons ----- Radar and Remote-Hearing Devices
25 tons ----- Long Range Wireless
25 tons ----- Backup Long Range Wireless
10 tons ----- Backup Short Range Wireless
100 tons ---- Flag facilities
15 tons ----- Climatization
15 tons ----- Extra Generators
75 tons ----- Planes
10 tons ----- Crane
15 tons ----- Extra Pumps
50 tons ----- Night fighting Equipment
46 tons ----- 1920 120mm rounds extra (total 250 per gun)
10 tons ----- 1560 3" rounds extra (total 350 per gun)
8 tons ------ 3060 57mm rounds extra (total 600 per gun)
1 tons ------ 52400 0.45 rounds extra (total 14000 per gattling gun)
45 tons ----- Reserves
1000 tons total