Japanese Ship Designs 1918+

[Desertfox]

Building off the sailing ship as ASW sloop idea, these are modified versions of the reconnaissance schooners, designed for ASW work. They have a better engine, longer range, and light armament. 

A-1 class, Japan ASW Schooner laid down 1921

Displacement:
   201 t light; 205 t standard; 215 t normal; 222 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (171.23 ft / 170.00 ft) x 20.00 ft x (4.70 / 4.82 ft)
   (52.19 m / 51.82 m) x 6.10 m  x (1.43 / 1.47 m)

Armament:
      4 - 1.00" / 25.4 mm 45.0 cal guns - 0.50lbs / 0.23kg shells, 250 per gun
     Machine guns in deck mounts, 1921 Model
     2 x Twin mounts on centreline, evenly spread
      Weight of broadside 2 lbs / 1 kg

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 1 shaft, 1,038 shp / 774 Kw = 17.00 kts
   Range 1,500nm at 10.00 kts
   Bunker at max displacement = 17 tons

Complement:
   27 - 36

Cost:
   £0.031 million / $0.124 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.2 %
      - Guns: 0 tons, 0.2 %
   Machinery: 36 tons, 16.7 %
   Hull, fittings & equipment: 72 tons, 33.3 %
   Fuel, ammunition & stores: 14 tons, 6.5 %
   Miscellaneous weights: 93 tons, 43.3 %
      - Hull below water: 16 tons
      - On freeboard deck: 74 tons
      - Above deck: 3 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     429 lbs / 195 Kg = 857.9 x 1.0 " / 25 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 0.6 ft / 0.2 m
   Roll period: 11.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.01
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.470 / 0.474
   Length to Beam Ratio: 8.50 : 1
   'Natural speed' for length: 13.04 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  7.00 ft / 2.13 m,  6.00 ft / 1.83 m
      - Forward deck:   30.00 %,  6.00 ft / 1.83 m,  6.00 ft / 1.83 m
      - Aft deck:   35.00 %,  6.00 ft / 1.83 m,  6.00 ft / 1.83 m
      - Quarter deck:   15.00 %,  6.00 ft / 1.83 m,  6.00 ft / 1.83 m
      - Average freeboard:      6.08 ft / 1.85 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 64.0 %
      - Above water (accommodation/working, high = better): 89.3 %
   Waterplane Area: 2,109 Square feet or 196 Square metres
   Displacement factor (Displacement / loading): 129 %
   Structure weight / hull surface area: 23 lbs/sq ft or 110 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 1.14
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room

10t - Auxiliary sail rigging
25t - LR Wireless
25t - Experimental Radar
20t - Enhanced ASW Suite
4t - 20x90kg DC, 2xASW Paravanes
9t - Electric Motor

[Jefgte]

Hatsuharu class, Japan Destroyer laid down 1920

Increase ASW armament
Reduce main guns - caliber or Qty
Reduce TT

[The Rock Doctor]

Fairly impressive amount of stuff aboard that wee thing.

[TacCovert4]

Hatsuharu class, Japan Destroyer laid down 1920

Increase ASW armament
Reduce main guns - caliber or Qty
Reduce TT

All depends on mission.  If you want this class to be your utility destroyer, probably pull one torp launcher and add more asw.   If you want a baby fleet dd.....it might be ok as is

[Desertfox]

Japanese destroyers are first and foremost anti-surface warship platforms, ASW is a distant second that at this time is best left to other platforms.

[TacCovert4]

Japanese destroyers are first and foremost anti-surface warship platforms, ASW is a distant second that at this time is best left to other platforms.

The RAN is pretty much of the same mind. Though as our ability to deal with submarines improves, we will likely be making drastic improvements to future destroyer and sloop types.

[Jefgte]

The RAN is pretty much of the same mind. Though as our ability to deal with submarines improves, we will likely be making drastic improvements to future destroyer and sloop types.

Yes, but if you have enough Miscellaneous Weights in reserve.

[Desertfox]

Cheap coastal torpedo boat.

Chidori class, Japan Torpedo Boat laid down 1921

Displacement:
   500 t light; 530 t standard; 587 t normal; 632 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (292.64 ft / 290.00 ft) x 24.20 ft x (7.70 / 8.07 ft)
   (89.20 m / 88.39 m) x 7.38 m  x (2.35 / 2.46 m)

Armament:
      3 - 5.00" / 127 mm 45.0 cal guns - 63.03lbs / 28.59kg shells, 170 per gun
     Quick firing guns in deck mounts, 1921 Model
     3 x Single mounts on centreline ends, majority aft
      4 - 1.00" / 25.4 mm 45.0 cal guns - 0.50lbs / 0.23kg shells, 300 per gun
     Machine guns in deck mounts, 1921 Model
     2 x Twin mounts on sides amidships
      Weight of broadside 191 lbs / 87 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.10" / 3 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 16,696 shp / 12,455 Kw = 31.30 kts
   Range 2,500nm at 14.00 kts
   Bunker at max displacement = 102 tons

Complement:
   59 - 77

Cost:
   £0.173 million / $0.690 million

Distribution of weights at normal displacement:
   Armament: 33 tons, 5.7 %
      - Guns: 33 tons, 5.7 %
   Armour: 1 tons, 0.1 %
      - Armament: 1 tons, 0.1 %
   Machinery: 294 tons, 50.0 %
   Hull, fittings & equipment: 151 tons, 25.8 %
   Fuel, ammunition & stores: 87 tons, 14.8 %
   Miscellaneous weights: 21 tons, 3.6 %
      - On freeboard deck: 18 tons
      - Above deck: 3 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     139 lbs / 63 Kg = 2.2 x 5.0 " / 127 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 0.9 ft / 0.3 m
   Roll period: 10.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.28
   Seaboat quality  (Average = 1.00): 0.82

Hull form characteristics:
   Hull has raised forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.380 / 0.391
   Length to Beam Ratio: 11.98 : 1
   'Natural speed' for length: 17.03 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 61
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   35.00 %,  15.00 ft / 4.57 m,  13.00 ft / 3.96 m
      - Forward deck:   40.00 %,  7.00 ft / 2.13 m,  7.00 ft / 2.13 m
      - Aft deck:   5.00 %,  7.00 ft / 2.13 m,  7.00 ft / 2.13 m
      - Quarter deck:   20.00 %,  7.00 ft / 2.13 m,  7.00 ft / 2.13 m
      - Average freeboard:      9.38 ft / 2.86 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 177.8 %
      - Above water (accommodation/working, high = better): 96.1 %
   Waterplane Area: 4,263 Square feet or 396 Square metres
   Displacement factor (Displacement / loading): 47 %
   Structure weight / hull surface area: 23 lbs/sq ft or 111 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.04
      - Overall: 0.54
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

3t - 1908 FC
18t - 6 x 21" Torpedoes

[Desertfox]

Aux ASW Sloops

Kaibokan III, Japan ASW Sloop  laid down 1921

Displacement:
   301 t light; 308 t standard; 361 t normal; 403 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (170.00 ft / 170.00 ft) x 27.00 ft x (5.50 / 5.98 ft)
   (51.82 m / 51.82 m) x 8.23 m  x (1.68 / 1.82 m)

Armament:
      4 - 1.00" / 25.4 mm 70.0 cal guns - 0.56lbs / 0.25kg shells, 200 per gun
     Machine guns in deck mounts, 1921 Model
     2 x Twin mounts on centreline, evenly spread
      Weight of broadside 2 lbs / 1 kg

Machinery:
   Oil fired boilers, steam turbines,
   Electric cruising motors plus geared drives, 2 shafts, 1,527 shp / 1,139 Kw = 17.00 kts
   Range 2,700nm at 14.00 kts
   Bunker at max displacement = 95 tons

Complement:
   40 - 53

Cost:
   £0.046 million / $0.185 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 0.2 %
      - Guns: 1 tons, 0.2 %
   Machinery: 53 tons, 14.6 %
   Hull, fittings & equipment: 144 tons, 40.0 %
   Fuel, ammunition & stores: 60 tons, 16.7 %
   Miscellaneous weights: 103 tons, 28.6 %
      - Hull below water: 14 tons
      - On freeboard deck: 89 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,265 lbs / 574 Kg = 2,529.9 x 1.0 " / 25 mm shells or 1.0 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 11.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.513
   Length to Beam Ratio: 6.30 : 1
   'Natural speed' for length: 13.04 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   31.00 %,  12.00 ft / 3.66 m,  10.00 ft / 3.05 m
      - Forward deck:   20.00 %,  10.00 ft / 3.05 m,  10.00 ft / 3.05 m
      - Aft deck:   16.00 %,  10.00 ft / 3.05 m,  10.00 ft / 3.05 m
      - Quarter deck:   33.00 %,  7.00 ft / 2.13 m,  7.00 ft / 2.13 m
      - Average freeboard:      9.26 ft / 2.82 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 53.3 %
      - Above water (accommodation/working, high = better): 145.6 %
   Waterplane Area: 3,058 Square feet or 284 Square metres
   Displacement factor (Displacement / loading): 171 %
   Structure weight / hull surface area: 32 lbs/sq ft or 155 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.66
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

1t - FC
25t - Experimental Radar
20t - Observation Balloon Equipment
25t - Enhanced Hydrophone Suite
10t - Minesweeping gear
8t - ASW Weapons (40 DC)
14t - Electric Drive

[Desertfox]

First purpose build aviation ship is a pair of seaplane tenders. They are based on the Matsu Maru fast transport hull. While the can carry up to 6 aircraft, they usually only operate with 4. They do have facilities to conduct repairs on heavy twin seaplanes but can't carry them.

Mizuho Maru, Japan Seaplane Tender laid down 1921

Displacement:
   1,481 t light; 1,526 t standard; 1,835 t normal; 2,082 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (347.47 ft / 345.00 ft) x 45.00 ft x (9.40 / 10.28 ft)
   (105.91 m / 105.16 m) x 13.72 m  x (2.87 / 3.13 m)

Armament:
      1 - 5.00" / 127 mm 45.0 cal gun - 63.03lbs / 28.59kg shells, 200 per gun
     Quick firing gun in deck mount, 1921 Model
     1 x Single mount on centreline, forward deck centre
      8 - 1.00" / 25.4 mm 70.0 cal guns - 0.56lbs / 0.25kg shells, 200 per gun
     Machine guns in deck mounts, 1921 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 68 lbs / 31 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.10" / 3 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 6,966 shp / 5,196 Kw = 21.00 kts
   Range 7,000nm at 14.00 kts
   Bunker at max displacement = 556 tons

Complement:
   139 - 182

Cost:
   £0.227 million / $0.907 million

Distribution of weights at normal displacement:
   Armament: 12 tons, 0.7 %
      - Guns: 12 tons, 0.7 %
   Armour: 0 tons, 0.0 %
      - Armament: 0 tons, 0.0 %
   Machinery: 240 tons, 13.1 %
   Hull, fittings & equipment: 654 tons, 35.6 %
   Fuel, ammunition & stores: 353 tons, 19.3 %
   Miscellaneous weights: 575 tons, 31.3 %
      - Hull below water: 120 tons
      - Hull above water: 150 tons
      - On freeboard deck: 250 tons
      - Above deck: 55 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,114 lbs / 1,866 Kg = 65.8 x 5.0 " / 127 mm shells or 1.6 torpedoes
   Stability (Unstable if below 1.00): 1.35
   Metacentric height 2.6 ft / 0.8 m
   Roll period: 11.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.01
   Seaboat quality  (Average = 1.00): 1.27

Hull form characteristics:
   Hull has raised forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.440 / 0.457
   Length to Beam Ratio: 7.67 : 1
   'Natural speed' for length: 18.57 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   30.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
      - Forward deck:   30.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 m
      - Aft deck:   25.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 m
      - Quarter deck:   15.00 %,  9.00 ft / 2.74 m,  9.00 ft / 2.74 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): 61.6 %
      - Above water (accommodation/working, high = better): 121.2 %
   Waterplane Area: 9,824 Square feet or 913 Square metres
   Displacement factor (Displacement / loading): 168 %
   Structure weight / hull surface area: 50 lbs/sq ft or 246 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.02
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

55t - LR Wireless/Radar/FC
20t - Observation Balloon
60t - 2 x 15t Boats
120t - Aircraft facilities (up to 6 embarked planes)
110t - Heavy seaplane crane/repair facilities
150t - Out-of-port resupply
60t - Electric Drive

[The Rock Doctor]

Hey, I've got dibs on red planes.

[Desertfox]

If you look closely you can even see the Wilno roundels... :P

[Desertfox]

Follow-on to the Furutakas. 900t heavier adds improved main guns, heavier torpedo loadout, 2 knots, and some actual (but light) armor. Not completely convinced about this design yet, would be nice if I could get it under 4k.

Aoba class, Japan Light Cruiser laid down 1921

Displacement:
   4,298 t light; 4,461 t standard; 4,860 t normal; 5,179 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (470.00 ft / 470.00 ft) x 47.00 ft x (17.50 / 18.30 ft)
   (143.26 m / 143.26 m) x 14.33 m  x (5.33 / 5.58 m)

Armament:
      6 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 170 per gun
     Quick firing guns in deck and hoist mounts, 1921 Model
     3 x Twin mounts on centreline, evenly spread
      1 raised mount
      16 - 1.00" / 25.4 mm 70.0 cal guns - 0.56lbs / 0.25kg shells, 200 per gun
     Quick firing guns in deck mounts, 1921 Model
     8 x Twin mounts on sides, evenly spread
      Weight of broadside 695 lbs / 315 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.00" / 51 mm   450.00 ft / 137.16 m   5.00 ft / 1.52 m
   Ends:   Unarmoured
     Main Belt covers 147 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.00" / 51 mm   0.50" / 13 mm      2.00" / 51 mm

   - Armoured deck - single deck:
   For and Aft decks: 1.00" / 25 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 57,913 shp / 43,203 Kw = 32.00 kts
   Range 5,000nm at 14.00 kts
   Bunker at max displacement = 718 tons

Complement:
   290 - 378

Cost:
   £1.279 million / $5.116 million

Distribution of weights at normal displacement:
   Armament: 165 tons, 3.4 %
      - Guns: 165 tons, 3.4 %
   Armour: 354 tons, 7.3 %
      - Belts: 172 tons, 3.5 %
      - Armament: 18 tons, 0.4 %
      - Armour Deck: 164 tons, 3.4 %
   Machinery: 1,991 tons, 41.0 %
   Hull, fittings & equipment: 1,692 tons, 34.8 %
   Fuel, ammunition & stores: 562 tons, 11.6 %
   Miscellaneous weights: 95 tons, 2.0 %
      - On freeboard deck: 50 tons
      - Above deck: 45 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,446 lbs / 1,110 Kg = 22.6 x 6.0 " / 152 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 2.0 ft / 0.6 m
   Roll period: 14.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.47
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.440 / 0.448
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 21.68 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 68
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   40.00 %,  20.00 ft / 6.10 m,  17.00 ft / 5.18 m
      - Forward deck:   30.00 %,  17.00 ft / 5.18 m,  15.00 ft / 4.57 m
      - Aft deck:   15.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
      - Quarter deck:   15.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
      - Average freeboard:      16.58 ft / 5.05 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 146.6 %
      - Above water (accommodation/working, high = better): 143.8 %
   Waterplane Area: 13,978 Square feet or 1,299 Square metres
   Displacement factor (Displacement / loading): 95 %
   Structure weight / hull surface area: 73 lbs/sq ft or 357 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.60
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

20t - Fire Control
25t - Long-range wireless
50t - 12 x 21" (H) Torpedo Tubes

[Desertfox]

Screw it, armor is overated. Only 100t more expensive but adds better guns, better torpedoes, and a knot. An extra knot and a 2" belt was not worth the 800t.

Aoba class, Japan Light Cruiser laid down 1921

Displacement:
   3,501 t light; 3,633 t standard; 4,131 t normal; 4,529 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (450.00 ft / 450.00 ft) x 45.00 ft x (17.00 / 18.10 ft)
   (137.16 m / 137.16 m) x 13.72 m  x (5.18 / 5.52 m)

Armament:
      6 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 130 per gun
     Quick firing guns in deck and hoist mounts, 1921 Model
     3 x Twin mounts on centreline, evenly spread
      1 raised mount
      8 - 1.00" / 25.4 mm 70.0 cal guns - 0.56lbs / 0.25kg shells, 200 per gun
     Quick firing guns in deck mounts, 1921 Model
     4 x Twin mounts on sides, evenly spread
      Weight of broadside 690 lbs / 313 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.00" / 76 mm   1.00" / 25 mm      3.00" / 76 mm

   - Protected deck - single deck:
   For and Aft decks: 1.00" / 25 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 46,374 shp / 34,595 Kw = 31.00 kts
   Range 7,000nm at 14.00 kts
   Bunker at max displacement = 896 tons

Complement:
   256 - 334

Cost:
   £1.066 million / $4.262 million

Distribution of weights at normal displacement:
   Armament: 164 tons, 4.0 %
      - Guns: 164 tons, 4.0 %
   Armour: 180 tons, 4.4 %
      - Armament: 33 tons, 0.8 %
      - Armour Deck: 147 tons, 3.6 %
   Machinery: 1,596 tons, 38.6 %
   Hull, fittings & equipment: 1,479 tons, 35.8 %
   Fuel, ammunition & stores: 630 tons, 15.3 %
   Miscellaneous weights: 82 tons, 2.0 %
      - On freeboard deck: 40 tons
      - Above deck: 42 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,237 lbs / 1,015 Kg = 20.7 x 6.0 " / 152 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.08
   Metacentric height 1.8 ft / 0.5 m
   Roll period: 14.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.55
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.420 / 0.432
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 21.21 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   40.00 %,  17.00 ft / 5.18 m,  15.00 ft / 4.57 m
      - Forward deck:   30.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
      - Aft deck:   15.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
      - Quarter deck:   15.00 %,  15.00 ft / 4.57 m,  15.00 ft / 4.57 m
      - Average freeboard:      15.32 ft / 4.67 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 141.0 %
      - Above water (accommodation/working, high = better): 140.9 %
   Waterplane Area: 12,625 Square feet or 1,173 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 72 lbs/sq ft or 353 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.54
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

20t - Fire Control
25t - Long-range wireless
48t - 6 x 21" (H) Torpedo Tubes + 4 Reloads

[TacCovert4]

Neat way to make something super-light.  But I worry about running a ship with basically no protection these days.  Something like an Eagle-class, which is much older would make short work of her.  Hell a Toucan with a FC refit might be able to give one of these a good fight just because it can take a couple of hits before major components start to be disabled.  With all the super-cruisers running about, I'd worry about this type.