GB/CA/1905 A2 Design

This is my GB/CA/1905 A2 armoured cruiser design. This is the sort of ship that would have been built if a dreadnought cruiser had not been built. My tweak was to not have superfiring 9.2in turrets on the beam, as they are not practical, in my view. This is the Springsharp report:

GB/CA/1905 A2 Design, Great Britain Armoured Cruiser laid down 1905 (Engine 1909)

Displacement:
 16,516 t light; 17,478 t standard; 20,663 t normal; 23,211 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (572.00 ft / 565.00 ft) x 80.00 ft x (25.00 / 27.60 ft)
 (174.35 m / 172.21 m) x 24.38 m  x (7.62 / 8.41 m)

Armament:
      16 - 9.20" / 234 mm 50.0 cal guns - 380.00lbs / 172.37kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts, 1905 Model
   2 x Twin mounts on centreline ends, evenly spread
   6 x Twin mounts on sides, evenly spread
      16 - 4.00" / 102 mm 50.0 cal guns - 31.99lbs / 14.51kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1905 Model
   16 x Single mounts on sides, evenly spread
  16 raised mounts
      Weight of broadside 6,592 lbs / 2,990 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 350.00 ft / 106.68 m 16.00 ft / 4.88 m
 Ends: 4.00" / 102 mm 205.00 ft / 62.48 m 16.00 ft / 4.88 m
   10.00 ft / 3.05 m Unarmoured ends
   Main Belt covers 95 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
  1.50" / 38 mm 350.00 ft / 106.68 m 25.00 ft / 7.62 m
 Beam between torpedo bulkheads 48.00 ft / 14.63 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 6.00" / 152 mm 5.00" / 127 mm  6.00" / 152 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm

   - Armoured deck - multiple decks:
 For and Aft decks: 2.00" / 51 mm
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 6.00" / 152 mm, Aft 5.00" / 127 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 60,277 shp / 44,967 Kw = 25.50 kts
 Range 5,600nm at 16.00 kts
 Bunker at max displacement = 5,732 tons (100% coal)

Complement:
 861 - 1,120

Cost:
 £1.715 million / $6.860 million

Distribution of weights at normal displacement:
 Armament: 1,740 tons, 8.4 %
    - Guns: 1,740 tons, 8.4 %
 Armour: 5,606 tons, 27.1 %
    - Belts: 1,954 tons, 9.5 %
    - Torpedo bulkhead: 486 tons, 2.4 %
    - Armament: 1,710 tons, 8.3 %
    - Armour Deck: 1,278 tons, 6.2 %
    - Conning Towers: 178 tons, 0.9 %
 Machinery: 3,014 tons, 14.6 %
 Hull, fittings & equipment: 6,155 tons, 29.8 %
 Fuel, ammunition & stores: 4,147 tons, 20.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   30,739 lbs / 13,943 Kg = 79.0 x 9.2 " / 234 mm shells or 4.2 torpedoes
 Stability (Unstable if below 1.00): 1.22
 Metacentric height 5.2 ft / 1.6 m
 Roll period: 14.8 seconds
 Steadiness - As gun platform (Average = 50 %): 61 %
   - Recoil effect (Restricted arc if above 1.00): 0.61
 Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.640 / 0.651
 Length to Beam Ratio: 7.06 : 1
 'Natural speed' for length: 23.77 kts
 Power going to wave formation at top speed: 54 %
 Trim (Max stability = 0, Max steadiness = 100): 51
 Bow angle (Positive = bow angles forward): -3.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  26.00 ft / 7.92 m,  24.00 ft / 7.32 m
    - Forward deck: 30.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Aft deck: 18.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Quarter deck: 27.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
    - Average freeboard:  22.04 ft / 6.72 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 132.6 %
  - Above water (accommodation/working, high = better): 182.2 %
 Waterplane Area: 34,309 Square feet or 3,187 Square metres
 Displacement factor (Displacement / loading): 112 %
 Structure weight / hull surface area: 141 lbs/sq ft or 687 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.96
  - Longitudinal: 1.46
  - Overall: 1.00
 Cramped machinery, storage, compartmentation space
 Excellent accommodation and workspace room