WesWorld

Coast Defense Ships of the Japanese Navy.

Data here is the data released to the public

Atsusa Class
HIJMS Atsusa
HIJMS Zansho
HIJMS Asasamu

Dimensions: 400.00 ft x 55.00 ft x 12.00 ft
Standard Displacement: 3,650 tons
Armament: 2x2 - 23.0 cm / 45 cal Model 1921 guns
8 - 50 mm / 60 cal Model 1918 AA guns
20 - 25 mm / 60 cal Model 1918 light AA guns
Armour: Belt 5.00"
Main turrets 8.00", AA gun shields 1.00", Light gun shields 1.00"
Armour deck 2.00", Conning tower 5.00"
Machinery: 8 Kanpon oil fired boilers, Parsons geared steam turbines,
Geared drive, 2 shafts, 8,000 shp = 19.00 kts
Range 5,000nm at 12.00 kts
Complement: 25 Officers, 288 other rank


Atatake Class
HIJMS Atatake
HIJMS Urarake

Dimensions: 440.00 ft x 60.00 ft x 21.50 ft
Standard Displacement: 7,600 tons
Armament: 2x2 - 28.0 cm / 50 cal Model 1924 guns
2x2 - 15.0 cm / 45 cal Model 1921 guns
8x2 - 10.5 cm / 50 cal Model 1921 guns
8 - 50 mm / 60 cal Model 1918 AA guns
18 - 25 mm / 60 cal Model 1918 light AA guns
Plane: 1 Friedrichshafen FF-50-J reconnaissance aircraft.
Armour: Belt 13.14", decapping plate 1.21"
Main turrets 10.00", 2nd turrets 2.00", 3nd turrets 1.00"
AA gun shields 1.00", Light AA gun shields 1.00"
Armour deck 4.00", Conning tower 3.00"
Machinery: 8 Kanpon oil fired boilers, Parsons geared steam turbines,
Geared drive, 3 shafts, 13,000 shp = 19.00 kts
Range 6,200nm at 15.00 kts
Complement: 38 officers 550 other rank

Preliminary data for 1926:

Fuji Class
HIJMS Fuji
Coast Defense Battleship

Dimensions: 580.00 ft x 92.00 ft x 25.70 ft
Standard Displacement: 18,280 tons
Armament: 2x2 - 12 inch / 55 cal Model 1925 guns
10x2 - 10.5 cm / 50 cal Model 1921 guns
4x4 - 2pdr / 39 cal Model 1923 AA guns
8x3 - 25 mm / 60 cal Model 1926 light AA guns
Plane: 3
Armour: Belt 20.5", decapping plate 1.5"
Main turrets 20.00", 2nd turrets 3.00",
AA gun shields 1.00", Light AA gun shields 1.00"
Armour deck 7.00", Conning tower 18.00"
Machinery: 8 Kanpon oil fired boilers, Parsons geared steam turbines,
Geared drive, 4 shafts, 44,000 shp = 22.00 kts
Range 9,000nm at 15.00 kts
Complement: 45 officers 980 other rank

Hideyoshi Class
HIJMS Hideyoshi Hashiba
Monitor

Dimensions: 410.00 ft x 94.00 ft x 17.30 ft
Standard Displacement: 18,280 tons
Armament: 1x2 - 38cm / 50 cal Model 1925 guns
4x2 - 10.5 cm / 50 cal Model 1921 guns
2x8 & 4x4 - 2pdr / 39 cal Model 1923 AA guns
8x3 - 25 mm / 60 cal Model 1926 light AA guns
Plane: 3
Armour: Belt 16", decapping plate 1.5"
Main turrets 18.00", 2nd turrets 3.00",
AA gun shields 1.00", Light AA gun shields 1.00"
Armour deck 6.00", Conning tower 18.00"
Machinery: 6 Kanpon oil fired boilers, Parsons geared steam turbines,
Geared drive, 2 shafts, 9,000 shp = 15.00 kts
Range 5,500nm at 15.00 kts
Complement: 40 officers 620 other rank

Atsusa, Japan CDS laid down 1921

Displacement:
3,630 t light; 3,840 t standard; 4,149 t normal; 4,379 t full load
Loading submergence 421 tons/feet

Dimensions:
400.00 ft x 55.00 ft x 12.00 ft (normal load)
121.92 m x 16.76 m x 3.66 m

Armament:
4 - 9.06" / 230 mm guns (2 Main turrets x 2 guns)
8 - 1.97" / 50 mm AA guns
20 - 0.98" / 25 mm guns
Weight of broadside 1,525 lbs / 692 kg

Armour:
Belt 5.00" / 127 mm, ends unarmoured
Belts cover 65 % of normal area
Main turrets 8.00" / 203 mm, AA gun shields 1.00" / 25 mm, Light gun shields 1.00" / 25 mm
Armour deck 2.00" / 51 mm, Conning tower 5.00" / 127 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 9,620 shp / 7,176 Kw = 20.00 kts
Range 5,800nm at 12.00 kts

Complement:
258 - 335

Cost:
£0.849 million / $3.396 million

Distribution of weights at normal displacement:
Armament: 191 tons, 4.6 %
Armour: 1,274 tons, 30.7 %
Belts: 319 tons, 7.7 %, Armament: 381 tons, 9.2 %, Armour Deck: 545 tons, 13.1 %
Conning Tower: 28 tons, 0.7 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 331 tons, 8.0 %
Hull, fittings & equipment: 1,834 tons, 44.2 %
Fuel, ammunition & stores: 519 tons, 12.5 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 3.3

Remarks:
Hull space for machinery, storage & compartmentation is excellent
Room for accommodation & workspaces is adequate

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.30
Shellfire needed to sink: 7,757 lbs / 3,518 Kg = 20.9 x 9.1 " / 230 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 2.1
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 53 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.29
Relative quality as seaboat: 1.06

Hull form characteristics:
Block coefficient: 0.550
Sharpness coefficient: 0.39
Hull speed coefficient 'M': 7.61
'Natural speed' for length: 20.00 kts
Power going to wave formation at top speed: 45 %
Trim: 50
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 62.2 %
Relative accommodation and working space: 112.1 %
(Average = 100%)
Displacement factor: 120 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.00
(Structure weight / hull surface area: 95 lbs / square foot or 464 Kg / square metre)
Relative longitudinal hull strength: 1.00
(for 10.30 ft / 3.14 m average freeboard, freeboard adjustment -2.40 ft)
Relative composite hull strength: 1.00

Atatake, Japan Monitor laid down 1924

Displacement:
7,499 t light; 7,991 t standard; 8,919 t normal; 9,627 t full load
Loading submergence 505 tons/feet

Dimensions:
440.00 ft x 60.00 ft x 21.50 ft (normal load)
134.11 m x 18.29 m x 6.55 m

Armament:
4 - 28.0 cm (11.02") / 50 cal Model 1924 guns in 2 Main turrets x 2 guns
4 - 15.0 cm (5.91") / 45 cal Model 1921 guns in 2 2nd turrets x 2 guns, 2 superfiring turrets; b and x
16 - 10.5 cm (4.13") / 50 cal Model 1921 guns in 8 3rd turrets x 2 guns (*)
8 - 50 mm (1.97") / 60 cal Model 1918 AA guns (*)
18 - 25 mm (0.98") / 60 cal Model 1918 light AA guns (*)
Weight of broadside 3,755 lbs / 1,703 kg

Armour:
Belt 13.14" / 334 mm + 0.36 / 9.1mm steel plate backing inclined at 10 degrees, decapping plate 1.21" / 31 mm (= upper belt), ends unarmoured
Belts cover 60 % of normal area
Main turrets 10.00" / 254 mm, 2nd turrets 2.00" / 51 mm, 3nd turrets 1.00" / 25 mm (**)
AA gun shields 1.00" / 25 mm, Light AA gun shields 1.00" / 25 mm
Armour deck 4.00" / 102 mm, Conning tower 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 14,529 shp / 10,839 Kw = 20.00 kts
Range 7,000nm at 15.00 kts

Complement:
38 officers 550 other rank (458 - 596)

Cost:
£2.237 million / $8.949 million

Distribution of weights at normal displacement:
Armament: 469 tons, 5.3 %
Armour: 3,149 tons, 35.3 %
Belts: 984 tons, 11.0 %, Armament: 828 tons, 9.3 %, Armour Deck: 1,309 tons, 14.7 %
Conning Tower: 28 tons, 0.3 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 479 tons, 5.4 %
Hull, fittings & equipment: 3,353 tons, 37.6 %
Fuel, ammunition & stores: 1,420 tons, 15.9 %
Miscellaneous weights: 50 tons, 0.6 %

Metacentric height 2.6

Remarks:
Hull space for machinery, storage & compartmentation is excellent
Room for accommodation & workspaces is adequate
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: 1.06
Shellfire needed to sink: 14,169 lbs / 6,427 Kg = 137.6 x 5.9 " / 150 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 2.6
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 71 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.87
Relative quality as seaboat: 1.52

Hull form characteristics:
Block coefficient: 0.550
Sharpness coefficient: 0.39
Hull speed coefficient 'M': 6.49
'Natural speed' for length: 20.98 kts
Power going to wave formation at top speed: 45 %
Trim: 47
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 59.4 %
Relative accommodation and working space: 108.9 %
(Average = 100%)
Displacement factor: 113 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.93
(Structure weight / hull surface area: 122 lbs / square foot or 598 Kg / square metre)
Relative longitudinal hull strength: 1.84
(for 14.80 ft / 4.51 m average freeboard)
Relative composite hull strength: 1.00

(*) 10.5 cm gun was simmed in the AA position and the 50 mm and 25 mm guns were simmed together as 50 mm guns
(**) Since the 10.5 was simmed in the AA position, I simmed with 1.01 inch of armor to double the armor weight for turrets.

Chikan Chuui, Japan Coast Defense Battleship laid down 1926

Displacement:
18,420 t light; 19,240 t standard; 21,550 t normal; 23,398 t full load

Dimensions: Length overall / water x beam x draught
591.29 ft / 580.00 ft x 80.00 ft (Bulges 92.00 ft) x 25.70 ft (normal load)
180.22 m / 176.78 m x 24.38 m (Bulges 28.04 m) x 7.83 m

Armament:
4 - 12.00" / 305 mm guns (2x2 guns), 925.00lbs / 419.57kg shells, 1925 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 4.13" / 105 mm guns (2x2 guns), 36.00lbs / 16.33kg shells, 1921 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread, all raised mounts
16 - 4.13" / 105 mm guns (8x2 guns), 36.00lbs / 16.33kg shells, 1921 Model
Dual purpose guns in turrets (on barbettes)
on side, all amidships, 4 raised mounts - superfiring
16 - 1.57" / 40.0 mm guns (4x4 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side ends, 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, 4 raised mounts
Weight of broadside 4,466 lbs / 2,026 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 20.5" / 521 mm 214.00 ft / 65.23 m 11.00 ft / 3.35 m
Ends: Unarmoured
Upper: 1.50" / 38 mm 214.00 ft / 65.23 m 12.00 ft / 3.66 m
Main Belt covers 57 % of normal length

- Torpedo Bulkhead and Bulges:
2.25" / 57 mm 214.00 ft / 65.23 m 23.59 ft / 7.19 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 20.0" / 508 mm 15.0" / 381 mm 18.0" / 457 mm
2nd: 3.00" / 76 mm 2.00" / 51 mm 2.00" / 51 mm
3rd: 3.00" / 76 mm 2.00" / 51 mm 2.00" / 51 mm
4th: 1.00" / 25 mm - -
5th: 1.00" / 25 mm - -

- Armour deck: 7.00" / 178 mm, Conning tower: 18.00" / 457 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 45,000 shp / 33,570 Kw = 23.70 kts
Range 10,900nm at 15.00 kts
Bunker at max displacement = 4,157 tons

Complement:
889 - 1,156

Cost:
£4.449 million / $17.796 million

Distribution of weights at normal displacement:
Armament: 526 tons, 2.4 %
Armour: 9,287 tons, 43.1 %
- Belts: 2,570 tons, 11.9 %
- Torpedo bulkhead: 420 tons, 2.0 %
- Armament: 1,803 tons, 8.4 %
- Armour Deck: 4,193 tons, 19.5 %
- Conning Tower: 300 tons, 1.4 %
Machinery: 1,440 tons, 6.7 %
Hull, fittings & equipment: 7,067 tons, 32.8 %
Fuel, ammunition & stores: 3,130 tons, 14.5 %
Miscellaneous weights: 100 tons, 0.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
51,381 lbs / 23,306 Kg = 59.5 x 12.0 " / 305 mm shells or 11.2 torpedoes
Stability (Unstable if below 1.00): 1.23
Metacentric height 5.2 ft / 1.6 m
Roll period: 16.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.24
Seaboat quality (Average = 1.00): 1.51

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 6.30 : 1
'Natural speed' for length: 24.08 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 4.00 ft / 1.22 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 27.20 ft / 8.29 m
- Forecastle (20 %): 20.10 ft / 6.13 m
- Mid (50 %): 19.10 ft / 5.82 m
- Quarterdeck (15 %): 19.10 ft / 5.82 m
- Stern: 19.10 ft / 5.82 m
- Average freeboard: 20.02 ft / 6.10 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 56.6 %
- Above water (accommodation/working, high = better): 134.1 %
Waterplane Area: 32,382 Square feet or 3,008 Square metres
Displacement factor (Displacement / loading): 131 %
Structure weight / hull surface area: 144 lbs/sq ft or 701 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.53
- 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

Main belt is 20.11inch (14.2"+5.91") with 0.39 inch steel plate backing. Belt inclined at 12 degrees.

Fuji, Japan Monitor laid down 1926

Displacement:
10,272 t light; 10,724 t standard; 11,811 t normal; 12,680 t full load

Dimensions: Length overall / water x beam x draught
417.53 ft / 410.00 ft x 80.00 ft (Bulges 94.00 ft) x 17.30 ft (normal load)
127.26 m / 124.97 m x 24.38 m (Bulges 28.65 m) x 5.27 m

Armament:
2 - 14.96" / 380 mm guns (1x2 guns), 1,700.00lbs / 771.11kg shells, 1925 Model
Breech loading guns in a turret (on a barbette)
on centreline forward, all raised guns - superfiring
8 - 4.13" / 105 mm guns (4x2 guns), 36.00lbs / 16.33kg shells, 1921 Model
Dual purpose guns in turrets (on barbettes)
on side, all aft, 2 raised mounts - superfiring
16 - 1.57" / 40.0 mm guns (2x8 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on centreline, all aft, 1 raised mount - superfiring
16 - 1.57" / 40.0 mm guns (4x4 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side, all amidships, 2 raised mounts - superfiring
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, 2 raised mounts
Weight of broadside 3,766 lbs / 1,708 kg
Shells per gun, main battery: 100

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16.0" / 406 mm 101.00 ft / 30.78 m 10.73 ft / 3.27 m
Ends: Unarmoured
Upper: 1.50" / 38 mm 101.00 ft / 30.78 m 11.50 ft / 3.51 m
Main Belt covers 38 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18.0" / 457 mm 12.0" / 305 mm 15.0" / 381 mm
2nd: 3.00" / 76 mm 2.00" / 51 mm 2.00" / 51 mm
3rd: 1.00" / 25 mm - -
4th: 1.00" / 25 mm - -
5th: 1.00" / 25 mm - -

- Armour deck: 6.00" / 152 mm, Conning tower: 18.00" / 457 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 8,000 shp / 5,968 Kw = 15.75 kts
Range 6,500nm at 15.00 kts
Bunker at max displacement = 1,956 tons

Complement:
566 - 736

Cost:
£2.710 million / $10.839 million

Distribution of weights at normal displacement:
Armament: 463 tons, 3.9 %
Armour: 4,943 tons, 41.8 %
- Belts: 1,218 tons, 10.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 811 tons, 6.9 %
- Armour Deck: 2,713 tons, 23.0 %
- Conning Tower: 201 tons, 1.7 %
Machinery: 256 tons, 2.2 %
Hull, fittings & equipment: 4,610 tons, 39.0 %
Fuel, ammunition & stores: 1,539 tons, 13.0 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
29,628 lbs / 13,439 Kg = 17.7 x 15.0 " / 380 mm shells or 6.5 torpedoes
Stability (Unstable if below 1.00): 1.27
Metacentric height 5.5 ft / 1.7 m
Roll period: 16.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.17
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.620
Length to Beam Ratio: 4.36 : 1
'Natural speed' for length: 20.25 kts
Power going to wave formation at top speed: 40 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 4.00 ft / 1.22 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (20 %): 11.60 ft / 3.54 m
- Mid (50 %): 11.50 ft / 3.51 m
- Quarterdeck (15 %): 11.50 ft / 3.51 m
- Stern: 11.50 ft / 3.51 m
- Average freeboard: 12.21 ft / 3.72 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 37.7 %
- Above water (accommodation/working, high = better): 94.8 %
Waterplane Area: 24,441 Square feet or 2,271 Square metres
Displacement factor (Displacement / loading): 129 %
Structure weight / hull surface area: 147 lbs/sq ft or 716 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.59
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Tonbogiri, Japan Coast Defene Ship laid down 1930
Ships: 7. Tonbogiri, Kumogiri, Onigiri, Ichimonji, Munechika, Yukimitsu, Muramasa.


Displacement:
1,907 t light; 2,084 t standard; 2,350 t normal; 2,563 t full load

Dimensions: Length overall / water x beam x draught
251.96 ft / 248.00 ft x 48.00 ft x 13.82 ft (normal load)
76.80 m / 75.59 m x 14.63 m x 4.21 m

Armament:
4 - 8.00" / 203 mm guns (2x2 guns), 250.00lbs / 113.40kg shells, 1930 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 2.95" / 75.0 mm guns (2x2 guns), 12.00lbs / 5.44kg shells, 1930 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
4 - 2.95" / 75.0 mm guns in single mounts, 12.00lbs / 5.44kg shells, 1930 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
8 - 1.57" / 40.0 mm guns (2x4 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side, all aft
12 - 0.98" / 25.0 mm guns (4x3 guns), 0.57lbs / 0.26kg shells, 1926 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread
Weight of broadside 1,119 lbs / 507 kg
Shells per gun, main battery: 200

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 102.00 ft / 31.09 m 8.26 ft / 2.52 m
Ends: Unarmoured
Main Belt covers 63 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.00" / 127 mm 3.00" / 76 mm 5.00" / 127 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
3rd: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
4th: 1.00" / 25 mm - -
5th: 1.00" / 25 mm - -

- Armour deck: 2.00" / 51 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 3,308 shp / 2,468 Kw = 16.00 kts
Range 8,000nm at 12.00 kts
Bunker at max displacement = 479 tons

Complement:
168 - 219

Cost:
£0.842 million / $3.368 million

Distribution of weights at normal displacement:
Armament: 144 tons, 6.1 %
Armour: 667 tons, 28.4 %
- Belts: 172 tons, 7.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 189 tons, 8.1 %
- Armour Deck: 293 tons, 12.5 %
- Conning Tower: 11 tons, 0.5 %
Machinery: 100 tons, 4.3 %
Hull, fittings & equipment: 997 tons, 42.4 %
Fuel, ammunition & stores: 443 tons, 18.8 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,090 lbs / 1,855 Kg = 16.0 x 8.0 " / 203 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 2.2 ft / 0.7 m
Roll period: 13.5 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.51
Seaboat quality (Average = 1.00): 1.50

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.500
Length to Beam Ratio: 5.17 : 1
'Natural speed' for length: 15.75 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): 12.50 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17.85 ft / 5.44 m
- Forecastle (29 %): 12.85 ft / 3.92 m
- Mid (57 %): 14.45 ft / 4.40 m (7.25 ft / 2.21 m aft of break)
- Quarterdeck (19 %): 7.25 ft / 2.21 m
- Stern: 7.00 ft / 2.13 m
- Average freeboard: 11.22 ft / 3.42 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 63.2 %
- Above water (accommodation/working, high = better): 96.2 %
Waterplane Area: 7,931 Square feet or 737 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 88 lbs/sq ft or 431 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 3.11
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
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