Coast Defence Ships

[Walter]

Coast Defense Ship Size Comparison.

Top to bottom: Katsuragi, Takao, Fuso, Kongo, Chinyen.

[Walter]

Katsuragi, Japan Coast Defense Ship class 3 laid down 1883



Ships: Katsuragi, Yamato, Musashi
Displacement:
   1,210 t light; 1,287 t standard; 1,403 t normal; 1,496 t full load

Dimensions: Length overall / water x beam x draught
   205.97 ft / 205.97 ft x 35.10 ft x 15.09 ft (normal load)
   62.78 m / 62.78 m x 10.70 m  x 4.60 m

Armament:
      2 - 6.69" / 170 mm guns in single mounts, 134.16lbs / 60.86kg shells, 1883 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread
      5 - 4.72" / 120 mm guns in single mounts, 47.19lbs / 21.40kg shells, 1883 Model
     Breech loading guns in deck mounts
     on side, all amidships
      1 - 3.00" / 76.2 mm guns in single mounts, 12.08lbs / 5.48kg shells, 1883 Model
     Quick firing gun in deck mount
     on side
      16 - 1.00" / 25.4 mm guns (4x4 guns), 0.45lbs / 0.20kg shells, 1883 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 524 lbs / 237 kg
   Shells per gun, main battery: 150
   2 - 15.0" / 380 mm submerged torpedo tubes

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 1,625 ihp / 1,213 Kw = 14.10 kts
   Range 1,800nm at 10.00 kts
   Bunker at max displacement = 208 tons (100% coal)

Complement:
   114 - 149

Cost:
   £0.143 million / $0.570 million

Distribution of weights at normal displacement:
   Armament: 65 tons, 4.7 %
   Machinery: 323 tons, 23.0 %
   Hull, fittings & equipment: 772 tons, 55.0 %
   Fuel, ammunition & stores: 193 tons, 13.7 %
   Miscellaneous weights: 50 tons, 3.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     850 lbs / 385 Kg = 6.3 x 6.7 " / 170 mm shells or 0.4 torpedoes
   Stability (Unstable if below 1.00): 1.22
   Metacentric height 1.5 ft / 0.5 m
   Roll period: 12.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.62
   Seaboat quality  (Average = 1.00): 1.90

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.450
   Length to Beam Ratio: 5.87 : 1
   'Natural speed' for length: 14.35 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 53
   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:      9.84 ft / 3.00 m
      - Forecastle (20 %):   9.84 ft / 3.00 m
      - Mid (50 %):      9.84 ft / 3.00 m
      - Quarterdeck (15 %):   9.84 ft / 3.00 m
      - Stern:      9.84 ft / 3.00 m
      - Average freeboard:   9.84 ft / 3.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 125.3 %
      - Above water (accommodation/working, high = better): 75.8 %
   Waterplane Area: 4,612 Square feet or 428 Square metres
   Displacement factor (Displacement / loading): 115 %
   Structure weight / hull surface area: 100 lbs/sq ft or 491 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.26
      - Longitudinal: 5.37
      - Overall: 1.45
   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
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Walter]

Takao, Japan Coast Defense Ship class 3 laid down 1886


Displacement:
   1,487 t light; 1,562 t standard; 1,760 t normal; 1,919 t full load

Dimensions: Length overall / water x beam x draught
   230.97 ft / 230.97 ft x 34.45 ft x 13.12 ft (normal load)
   70.40 m / 70.40 m x 10.50 m  x 4.00 m

Armament:
      4 - 6.00" / 152 mm guns in single mounts, 101.52lbs / 46.05kg shells, 1886 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread
      1 - 4.72" / 120 mm guns in single mounts, 49.56lbs / 22.48kg shells, 1886 Model
     Breech loading gun in deck mount
     on side amidships
      1 - 2.24" / 57.0 mm guns in single mounts, 5.31lbs / 2.41kg shells, 1886 Model
     Quick firing gun in deck mount
     on side
      8 - 1.00" / 25.4 mm guns (2x4 guns), 0.47lbs / 0.21kg shells, 1886 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 465 lbs / 211 kg
   Shells per gun, main battery: 150
   2 - 15.0" / 380 mm submerged torpedo tubes

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 2,296 ihp / 1,713 Kw = 15.00 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 356 tons (100% coal)

Complement:
   135 - 176

Cost:
   £0.163 million / $0.653 million

Distribution of weights at normal displacement:
   Armament: 58 tons, 3.3 %
   Machinery: 446 tons, 25.3 %
   Hull, fittings & equipment: 933 tons, 53.0 %
   Fuel, ammunition & stores: 273 tons, 15.5 %
   Miscellaneous weights: 50 tons, 2.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,184 lbs / 537 Kg = 11.7 x 6.0 " / 152 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 1.3 ft / 0.4 m
   Roll period: 12.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.71
   Seaboat quality  (Average = 1.00): 1.54

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.590
   Length to Beam Ratio: 6.70 : 1
   'Natural speed' for length: 15.20 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 65
   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:      9.84 ft / 3.00 m
      - Forecastle (20 %):   9.84 ft / 3.00 m
      - Mid (50 %):      9.84 ft / 3.00 m
      - Quarterdeck (15 %):   9.84 ft / 3.00 m
      - Stern:      9.84 ft / 3.00 m
      - Average freeboard:   9.84 ft / 3.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 119.9 %
      - Above water (accommodation/working, high = better): 80.1 %
   Waterplane Area: 5,765 Square feet or 536 Square metres
   Displacement factor (Displacement / loading): 125 %
   Structure weight / hull surface area: 104 lbs/sq ft or 506 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.48
      - Longitudinal: 3.58
      - Overall: 1.61
   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
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Walter]

Fuso, Japan Coast Defense ship class 2 laid down 1875



Displacement:
   3,068 t light; 3,298 t standard; 3,529 t normal; 3,713 t full load

Dimensions: Length overall / water x beam x draught
   219.82 ft / 219.82 ft x 47.90 ft x 18.04 ft (normal load)
   67.00 m / 67.00 m x 14.60 m  x 5.50 m

Armament:
      4 - 10.00" / 254 mm guns (2x2 guns), 387.50lbs / 175.77kg shells, 1875 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread
      2 - 6.69" / 170 mm guns in single mounts, 116.18lbs / 52.70kg shells, 1875 Model
     Breech loading guns in deck mounts
     on side, all amidships
      6 - 3.00" / 76.2 mm guns in single mounts, 10.46lbs / 4.74kg shells, 1875 Model
     Breech loading guns in deck mounts
     on side, evenly spread
      4 - 1.00" / 25.4 mm guns (1x4 guns), 0.50lbs / 0.23kg shells, 1890 Model
     Machine guns in deck mount
     on side
   Weight of broadside 1,847 lbs / 838 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.06" / 230 mm   150.92 ft / 46.00 m   8.30 ft / 2.53 m
   Ends:   Unarmoured
     Main Belt covers 106 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   7.87" / 200 mm         -               -
   2nd:   3.94" / 100 mm         -               -

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 2,401 ihp / 1,791 Kw = 13.00 kts
   Range 1,500nm at 10.00 kts
   Bunker at max displacement = 416 tons (100% coal)

Complement:
   228 - 297

Cost:
   £0.374 million / $1.498 million

Distribution of weights at normal displacement:
   Armament: 231 tons, 6.5 %
   Armour: 716 tons, 20.3 %
      - Belts: 510 tons, 14.5 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 206 tons, 5.8 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 522 tons, 14.8 %
   Hull, fittings & equipment: 1,399 tons, 39.6 %
   Fuel, ammunition & stores: 460 tons, 13.0 %
   Miscellaneous weights: 200 tons, 5.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,351 lbs / 1,066 Kg = 6.1 x 10.0 " / 254 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.32
   Metacentric height 2.7 ft / 0.8 m
   Roll period: 12.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.39
   Seaboat quality  (Average = 1.00): 1.65

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.650
   Length to Beam Ratio: 4.59 : 1
   'Natural speed' for length: 14.83 kts
   Power going to wave formation at top speed: 50 %
   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:      9.84 ft / 3.00 m
      - Forecastle (20 %):   9.84 ft / 3.00 m
      - Mid (50 %):      9.84 ft / 3.00 m
      - Quarterdeck (15 %):   9.84 ft / 3.00 m
      - Stern:      9.84 ft / 3.00 m
      - Average freeboard:   9.84 ft / 3.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 104.7 %
      - Above water (accommodation/working, high = better): 66.3 %
   Waterplane Area: 8,066 Square feet or 749 Square metres
   Displacement factor (Displacement / loading): 92 %
   Structure weight / hull surface area: 121 lbs/sq ft or 589 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.14
      - Longitudinal: 4.07
      - Overall: 1.30
   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]

Kongo, Japan Coast Defense ship class 3 laid down 1875



Ships: Kongo, Hiei
Displacement:
   2,024 t light; 2,149 t standard; 2,321 t normal; 2,459 t full load

Dimensions: Length overall / water x beam x draught
   229.66 ft / 229.66 ft x 40.68 ft x 17.39 ft (normal load)
   70.00 m / 70.00 m x 12.40 m  x 5.30 m

Armament:
      3 - 6.69" / 170 mm guns (2 mounts), 116.18lbs / 52.70kg shells, 1875 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread
      6 - 6.00" / 152 mm guns (2x3 guns), 83.70lbs / 37.97kg shells, 1875 Model
     Breech loading guns in deck mounts
     on side, all amidships
      4 - 1.46" / 37.0 mm guns in single mounts, 1.20lbs / 0.54kg shells, 1875 Model
     Breech loading guns in deck mounts
     on side, evenly spread
   Weight of broadside 856 lbs / 388 kg
   Shells per gun, main battery: 150
   2 - 14.2" / 360 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.53" / 115 mm   187.01 ft / 57.00 m   8.30 ft / 2.53 m
   Ends:   Unarmoured
     Main Belt covers 125 % of normal length

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 2,280 ihp / 1,701 Kw = 14.00 kts
   Range 1,500nm at 10.00 kts
   Bunker at max displacement = 310 tons (100% coal)

Complement:
   166 - 217

Cost:
   £0.231 million / $0.925 million

Distribution of weights at normal displacement:
   Armament: 107 tons, 4.6 %
   Armour: 291 tons, 12.5 %
      - Belts: 291 tons, 12.5 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 0 tons, 0.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 503 tons, 21.7 %
   Hull, fittings & equipment: 922 tons, 39.7 %
   Fuel, ammunition & stores: 297 tons, 12.8 %
   Miscellaneous weights: 200 tons, 8.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,158 lbs / 525 Kg = 10.0 x 6.7 " / 170 mm shells or 0.4 torpedoes
   Stability (Unstable if below 1.00): 1.23
   Metacentric height 1.9 ft / 0.6 m
   Roll period: 12.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.89

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.500
   Length to Beam Ratio: 5.65 : 1
   'Natural speed' for length: 15.15 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 53
   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:      9.84 ft / 3.00 m
      - Forecastle (20 %):   9.84 ft / 3.00 m
      - Mid (50 %):      9.84 ft / 3.00 m
      - Quarterdeck (15 %):   9.84 ft / 3.00 m
      - Stern:      9.84 ft / 3.00 m
      - Average freeboard:   9.84 ft / 3.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 123.0 %
      - Above water (accommodation/working, high = better): 70.3 %
   Waterplane Area: 6,225 Square feet or 578 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 93 lbs/sq ft or 454 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.05
      - Longitudinal: 3.56
      - Overall: 1.19
   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
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Walter]

Chinyen, Japan Coast Defense ship class 1 laid down 1881



Displacement:
   6,469 t light; 6,902 t standard; 7,199 t normal; 7,436 t full load

Dimensions: Length overall / water x beam x draught
   298.56 ft / 298.56 ft x 58.73 ft x 19.69 ft (normal load)
   91.00 m / 91.00 m x 17.90 m  x 6.00 m

Armament:
      4 - 12.00" / 305 mm guns (2x2 guns), 747.36lbs / 339.00kg shells, 1881 Model
     Breech loading guns in Coles/Ericsson turrets
     on centreline ends, evenly spread
      4 - 6.00" / 152 mm guns in single mounts, 93.42lbs / 42.37kg shells, 1881 Model
     Breech loading guns in deck mounts
     on side, all amidships
      2 - 2.24" / 57.0 mm guns in single mounts, 4.89lbs / 2.22kg shells, 1881 Model
     Breech loading guns in deck mounts
     on side, evenly spread
      8 - 1.85" / 47.0 mm guns in single mounts, 2.74lbs / 1.24kg shells, 1881 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 3,395 lbs / 1,540 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   180.45 ft / 55.00 m   9.19 ft / 2.80 m
   Ends:   Unarmoured
     Main Belt covers 93 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   1.97" / 50 mm            -

   - Armour deck: 1.97" / 50 mm, Conning tower: 7.87" / 200 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 4,851 ihp / 3,619 Kw = 14.40 kts
   Range 1,500nm at 10.00 kts
   Bunker at max displacement = 534 tons (100% coal)

Complement:
   389 - 507

Cost:
   £0.721 million / $2.885 million

Distribution of weights at normal displacement:
   Armament: 424 tons, 5.9 %
   Armour: 2,210 tons, 30.7 %
      - Belts: 908 tons, 12.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 714 tons, 9.9 %
      - Armour Deck: 526 tons, 7.3 %
      - Conning Tower: 63 tons, 0.9 %
   Machinery: 989 tons, 13.7 %
   Hull, fittings & equipment: 2,745 tons, 38.1 %
   Fuel, ammunition & stores: 730 tons, 10.1 %
   Miscellaneous weights: 100 tons, 1.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5,459 lbs / 2,476 Kg = 7.3 x 12.0 " / 305 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 15.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.57
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.730
   Length to Beam Ratio: 5.08 : 1
   'Natural speed' for length: 17.28 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   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:      9.84 ft / 3.00 m
      - Forecastle (20 %):   9.84 ft / 3.00 m
      - Mid (50 %):      9.84 ft / 3.00 m
      - Quarterdeck (15 %):   9.84 ft / 3.00 m
      - Stern:      9.84 ft / 3.00 m
      - Average freeboard:   9.84 ft / 3.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91.9 %
      - Above water (accommodation/working, high = better): 69.5 %
   Waterplane Area: 14,431 Square feet or 1,341 Square metres
   Displacement factor (Displacement / loading): 94 %
   Structure weight / hull surface area: 143 lbs/sq ft or 697 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 2.01
      - Overall: 1.04
   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
   Good seaboat, rides out heavy weather easily

[Walter]

Tsukuba, Japan Coast Defense ship class 3 laid down 1853


Corvette (Unarmoured)

Displacement:
   1,448 t light; 1,497 t standard; 1,767 t normal; 1,983 t full load

Dimensions: Length overall / water x beam x draught
   197.83 ft / 197.83 ft x 34.78 ft x 17.98 ft (normal load)
   60.30 m / 60.30 m x 10.60 m  x 5.48 m

Armament:
      6 - 4.49" / 114 mm guns in single mounts, 20.12lbs / 9.13kg shells, 1853 Model
     Muzzle loading guns in broadside mounts
     on side, all amidships
      2 - 5.13" / 130 mm guns in single mounts, 30.00lbs / 13.61kg shells, 1853 Model
     Muzzle loading guns in broadside mounts
     on side, all aft
      2 - 4.76" / 121 mm guns in single mounts, 24.00lbs / 10.88kg shells, 1853 Model
     Muzzle loading guns in broadside mounts
     on side, all forward
   Weight of broadside 229 lbs / 104 kg
   Shells per gun, main battery: 100

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 1 shaft, 697 ihp / 520 Kw = 10.00 kts
   Range 1,500nm at 8.00 kts
   Bunker at max displacement = 486 tons (100% coal)

Complement:
   136 - 177

Cost:
   £0.117 million / $0.466 million

Distribution of weights at normal displacement:
   Armament: 29 tons, 1.6 %
   Machinery: 299 tons, 16.9 %
   Hull, fittings & equipment: 920 tons, 52.1 %
   Fuel, ammunition & stores: 319 tons, 18.1 %
   Miscellaneous weights: 200 tons, 11.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     896 lbs / 406 Kg = 44.5 x 4.5 " / 114 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 13.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.21
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.500
   Length to Beam Ratio: 5.69 : 1
   'Natural speed' for length: 14.07 kts
   Power going to wave formation at top speed: 32 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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:      10.50 ft / 3.20 m
      - Forecastle (20 %):   10.50 ft / 3.20 m
      - Mid (50 %):      10.50 ft / 3.20 m
      - Quarterdeck (15 %):   10.50 ft / 3.20 m
      - Stern:      10.50 ft / 3.20 m
      - Average freeboard:   10.50 ft / 3.20 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 80.0 %
      - Above water (accommodation/working, high = better): 64.8 %
   Waterplane Area: 4,406 Square feet or 409 Square metres
   Displacement factor (Displacement / loading): 172 %
   Structure weight / hull surface area: 114 lbs/sq ft or 558 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.08
      - Longitudinal: 4.81
      - Overall: 1.25
   Hull space for machinery, storage, compartmentation is excellent
   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]

Kaimon, Japan Coast Defense ship class 3 laid down 1877


Displacement:
   1,244 t light; 1,312 t standard; 1,473 t normal; 1,602 t full load

Dimensions: Length overall / water x beam x draught
   213.25 ft / 213.25 ft x 35.43 ft x 17.06 ft (normal load)
   65.00 m / 65.00 m x 10.80 m  x 5.20 m

Armament:
      1 - 6.69" / 170 mm guns in single mounts, 120.67lbs / 54.74kg shells, 1877 Model
     Breech loading gun in a deck mount with hoist
     on centreline aft
      6 - 4.72" / 120 mm guns in single mounts, 42.44lbs / 19.25kg shells, 1877 Model
     Breech loading guns in deck mounts
     on centreline, all amidships
      1 - 3.00" / 76.2 mm guns in single mounts, 10.87lbs / 4.93kg shells, 1877 Model
     Breech loading gun in deck mount
     on side
      16 - 1.00" / 25.4 mm guns (4x4 guns), 0.43lbs / 0.19kg shells, 1880 Model
     Machine guns in deck mounts
     on side, evenly spread
      1 - 0.45" / 11.5 mm guns in single mounts, 0.04lbs / 0.02kg shells, 1880 Model
     Machine gun in deck mount
     on side
   Weight of broadside 393 lbs / 178 kg
   Shells per gun, main battery: 150

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 1 shaft, 965 ihp / 720 Kw = 12.00 kts
   Range 2,000nm at 10.00 kts
   Bunker at max displacement = 290 tons (100% coal)

Complement:
   118 - 154

Cost:
   £0.114 million / $0.456 million

Distribution of weights at normal displacement:
   Armament: 49 tons, 3.3 %
   Machinery: 208 tons, 14.1 %
   Hull, fittings & equipment: 837 tons, 56.8 %
   Fuel, ammunition & stores: 229 tons, 15.5 %
   Miscellaneous weights: 150 tons, 10.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,427 lbs / 647 Kg = 11.8 x 6.7 " / 170 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.50
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.400
   Length to Beam Ratio: 6.02 : 1
   'Natural speed' for length: 14.60 kts
   Power going to wave formation at top speed: 34 %
   Trim (Max stability = 0, Max steadiness = 100): 51
   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:      11.15 ft / 3.40 m
      - Forecastle (20 %):   11.15 ft / 3.40 m
      - Mid (50 %):      11.15 ft / 3.40 m
      - Quarterdeck (15 %):   11.15 ft / 3.40 m
      - Stern:      11.15 ft / 3.40 m
      - Average freeboard:   11.15 ft / 3.40 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 83.5 %
      - Above water (accommodation/working, high = better): 79.2 %
   Waterplane Area: 4,398 Square feet or 409 Square metres
   Displacement factor (Displacement / loading): 154 %
   Structure weight / hull surface area: 102 lbs/sq ft or 499 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.23
      - Longitudinal: 6.33
      - Overall: 1.45
   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]

Tenryu, Japan Coast Defense ship class 3 laid down 1878


Displacement:
   1,293 t light; 1,351 t standard; 1,510 t normal; 1,638 t full load

Dimensions: Length overall / water x beam x draught
   213.25 ft / 213.25 ft x 35.43 ft x 17.06 ft (normal load)
   65.00 m / 65.00 m x 10.80 m  x 5.20 m

Armament:
      1 - 6.00" / 152 mm guns in single mounts, 88.56lbs / 40.17kg shells, 1878 Model
     Breech loading gun in a deck mount with hoist
     on centreline aft
      4 - 4.72" / 120 mm guns in single mounts, 43.23lbs / 19.61kg shells, 1878 Model
     Breech loading guns in deck mounts
     on centreline, all amidships
      1 - 3.00" / 76.2 mm guns in single mounts, 11.07lbs / 5.02kg shells, 1878 Model
     Breech loading gun in deck mount
     on side
      16 - 1.00" / 25.4 mm guns (4x4 guns), 0.43lbs / 0.19kg shells, 1880 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 279 lbs / 127 kg
   Shells per gun, main battery: 150

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 1 shaft, 971 ihp / 724 Kw = 12.00 kts
   Range 2,000nm at 10.00 kts
   Bunker at max displacement = 287 tons (100% coal)

Complement:
   120 - 157

Cost:
   £0.103 million / $0.414 million

Distribution of weights at normal displacement:
   Armament: 35 tons, 2.3 %
   Machinery: 206 tons, 13.7 %
   Hull, fittings & equipment: 902 tons, 59.7 %
   Fuel, ammunition & stores: 217 tons, 14.4 %
   Miscellaneous weights: 150 tons, 9.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,664 lbs / 755 Kg = 18.8 x 6.0 " / 152 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.410
   Length to Beam Ratio: 6.02 : 1
   'Natural speed' for length: 14.60 kts
   Power going to wave formation at top speed: 34 %
   Trim (Max stability = 0, Max steadiness = 100): 51
   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:      11.15 ft / 3.40 m
      - Forecastle (20 %):   11.15 ft / 3.40 m
      - Mid (50 %):      11.15 ft / 3.40 m
      - Quarterdeck (15 %):   11.15 ft / 3.40 m
      - Stern:      11.15 ft / 3.40 m
      - Average freeboard:   11.15 ft / 3.40 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.0 %
      - Above water (accommodation/working, high = better): 78.4 %
   Waterplane Area: 4,431 Square feet or 412 Square metres
   Displacement factor (Displacement / loading): 179 %
   Structure weight / hull surface area: 109 lbs/sq ft or 534 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.41
      - Longitudinal: 6.81
      - Overall: 1.65
   Hull space for machinery, storage, compartmentation is excellent
   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]

Vessels redesignated as Coast Defense Ships

Battleships Fuji, Yashima, Shikishima, Hatsue, Asahi and Mikasa as of 1/1/1917.
Cruisers class 1 Asama, Tokiwa, Yakumo, Azuma, Izumo, Iwate, Kasuga and Nisshin as of 1/1/1917.

Cruisers class 2 Naniwa, Takachiho, Matsushima, Itsukushima and Hashidate as of 1/1/1912.

Cruisers class 2 Yoshino, Takasago and Chitose as of 1/1/1917.

Cruisers class 3 Izumi, Chiyoda and Akitsushima as of 1/1/1912.

Cruisers class 3 Akashi as of 1/1/1917.