How about an 1876 battleship?

Just for fun, I thought that I would try an 1876 battleship: the GB/BB/1876. This is intended to be a sort of breastwork monitor type, similar to the Devastation type. My freeboard may actually be higher than than the Devastation. My ship has 4-12.5in and 6-6in guns. The armour basis is 14 inches with unarmoured ends. They have 4in deck protection, only. My main battery is in Coles turrets. The speed is 14 knots, which I would think would be reasonable for the date. This is the Springsharp report:

GB/BB/1876, Great Britain Battleship laid down 1876

Displacement:
 10,604 t light; 11,044 t standard; 11,996 t normal; 12,757 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (358.00 ft / 345.00 ft) x 72.00 ft x (27.00 / 28.43 ft)
 (109.12 m / 105.16 m) x 21.95 m  x (8.23 / 8.67 m)

Armament:
      4 - 12.50" / 318 mm 25.0 cal guns - 785.00lbs / 356.07kg shells, 90 per gun
   Breech loading guns in Coles/Ericsson turret mounts, 1876 Model
   2 x Single mounts on centreline ends, evenly spread
      6 - 6.00" / 152 mm 26.0 cal guns - 87.43lbs / 39.66kg shells, 150 per gun
   Breech loading guns in casemate mounts, 1876 Model
   6 x Single mounts on sides amidships
      Weight of broadside 3,665 lbs / 1,662 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 14.0" / 356 mm 270.00 ft / 82.30 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 120 % of normal length

   - Torpedo Bulkhead:
  1.00" / 25 mm 270.00 ft / 82.30 m 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 14.0" / 356 mm 7.00" / 178 mm        -
 2nd: 8.00" / 203 mm 5.00" / 127 mm  8.00" / 203 mm

   - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks
 Forecastle: 4.00" / 102 mm  Quarter deck: 4.00" / 102 mm

   - Conning towers: Forward 14.00" / 356 mm,  Aft 0.00" / 0 mm

Machinery:
 Coal fired boilers, simple reciprocating steam engines, 
 Direct drive, 2 shafts, 5,796 ihp / 4,324 Kw = 14.00 kts
 Range 4,200nm at 9.00 kts
 Bunker at max displacement = 1,712 tons (100% coal)

Complement:
 573 - 745

Cost:
 £0.727 million / $2.908 million

Distribution of weights at normal displacement:
 Armament: 423 tons, 3.5 %
 Armour: 4,746 tons, 39.6 %
    - Belts: 2,645 tons, 22.0 %
    - Torpedo bulkhead: 270 tons, 2.2 %
    - Armament: 538 tons, 4.5 %
    - Armour Deck: 1,136 tons, 9.5 %
    - Conning Tower: 158 tons, 1.3 %
 Machinery: 1,271 tons, 10.6 %
 Hull, fittings & equipment: 4,163 tons, 34.7 %
 Fuel, ammunition & stores: 1,392 tons, 11.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   22,047 lbs / 10,000 Kg = 28.6 x 12.5 " / 318 mm shells or 3.9 torpedoes
 Stability (Unstable if below 1.00): 1.37
 Metacentric height 5.3 ft / 1.6 m
 Roll period: 13.1 seconds
 Steadiness - As gun platform (Average = 50 %): 100 %
   - Recoil effect (Restricted arc if above 1.00): 0.58
 Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
 Hull has low forecastle, low quarterdeck ,
   a ram bow and a cruiser stern
 Block coefficient (normal/deep): 0.626 / 0.632
 Length to Beam Ratio: 4.79 : 1
 'Natural speed' for length: 18.57 kts
 Power going to wave formation at top speed: 41 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -4.00 degrees
 Stern overhang: 4.00 ft / 1.22 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Forward deck: 30.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Aft deck: 25.00 %,  22.00 ft / 6.71 m,  22.00 ft / 6.71 m
    - Quarter deck: 25.00 %,  12.00 ft / 3.66 m,  12.00 ft / 3.66 m
    - Average freeboard:  17.90 ft / 5.46 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 68.9 %
  - Above water (accommodation/working, high = better): 136.1 %
 Waterplane Area: 18,613 Square feet or 1,729 Square metres
 Displacement factor (Displacement / loading): 134 %
 Structure weight / hull surface area: 157 lbs/sq ft or 767 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.87
  - Longitudinal: 3.74
  - 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