A Belted Cruiser: the GB/CA/1905

I have been thinking a lot about 1880's design standards. One thread of development in that period were belted cruisers. They had a relatively thick, but narrow belt of armour. That was the main protection, although there would have been some deck armour, as well. My design has 8-9.2in/50 BLR and 16-4in QF guns. The belt is just 10ft wide, but is 8in thick. The speed is a more modern 25 knots. This is the Springsharp report:

GB/CA/1905, Great Britain Belted Cruiser laid down 1905 (Engine 1910)

Displacement:
 10,209 t light; 10,764 t standard; 12,948 t normal; 14,694 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (492.00 ft / 485.00 ft) x 65.00 ft x (25.00 / 27.71 ft)
 (149.96 m / 147.83 m) x 19.81 m  x (7.62 / 8.45 m)

Armament:
      8 - 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
   2 x Twin mounts on sides amidships
   Aft Main mounts separated by engine room
      16 - 4.00" / 102 mm 45.0 cal guns - 32.00lbs / 14.51kg shells, 150 per gun
   Quick firing guns in casemate mounts, 1905 Model
   16 x Single mounts on sides amidships
  8 raised mounts
      Weight of broadside 3,552 lbs / 1,611 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 8.00" / 203 mm 390.00 ft / 118.87 m 10.00 ft / 3.05 m
 Ends: Unarmoured
   Main Belt covers 124 % of normal length

   - Torpedo Bulkhead:
  1.00" / 25 mm 390.00 ft / 118.87 m 25.00 ft / 7.62 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 7.00" / 178 mm 4.00" / 102 mm  6.00" / 152 mm
 2nd: 4.00" / 102 mm 4.00" / 102 mm  4.00" / 102 mm

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

   - Conning towers: Forward 5.00" / 127 mm,  Aft 0.00" / 0 mm

Machinery:
 Coal fired boilers, steam turbines, 
 Direct drive, 4 shafts, 42,596 shp / 31,776 Kw = 25.00 kts
 Range 5,400nm at 16.00 kts
 Bunker at max displacement = 3,930 tons (100% coal)

Complement:
 606 - 788

Cost:
 £0.996 million / $3.985 million

Distribution of weights at normal displacement:
 Armament: 909 tons, 7.0 %
 Armour: 3,453 tons, 26.7 %
    - Belts: 1,275 tons, 9.8 %
    - Torpedo bulkhead: 361 tons, 2.8 %
    - Armament: 919 tons, 7.1 %
    - Armour Deck: 838 tons, 6.5 %
    - Conning Tower: 59 tons, 0.5 %
 Machinery: 1,936 tons, 15.0 %
 Hull, fittings & equipment: 3,912 tons, 30.2 %
 Fuel, ammunition & stores: 2,738 tons, 21.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   20,351 lbs / 9,231 Kg = 52.3 x 9.2 " / 234 mm shells or 3.1 torpedoes
 Stability (Unstable if below 1.00): 1.17
 Metacentric height 3.5 ft / 1.1 m
 Roll period: 14.6 seconds
 Steadiness - As gun platform (Average = 50 %): 69 %
   - Recoil effect (Restricted arc if above 1.00): 0.76
 Seaboat quality  (Average = 1.00): 1.37

Hull form characteristics:
 Hull has low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.575 / 0.589
 Length to Beam Ratio: 7.46 : 1
 'Natural speed' for length: 22.02 kts
 Power going to wave formation at top speed: 55 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 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: 13.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Quarter deck: 32.00 %,  16.00 ft / 4.88 m,  16.00 ft / 4.88 m
    - Average freeboard:  21.64 ft / 6.60 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 108.8 %
  - Above water (accommodation/working, high = better): 169.9 %
 Waterplane Area: 22,523 Square feet or 2,092 Square metres
 Displacement factor (Displacement / loading): 120 %
 Structure weight / hull surface area: 119 lbs/sq ft or 583 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.19
  - 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