The anachronistic Ger/BB/1905 design

My anachronistic Ger/BB/1905 works well in Springsharp, if I follow my usual practices. The speed is much higher than what I had envisioned. I had expected that the ship could be pressed to reach 22 nkots. With the sort of machinery that the design has, the ship can reach 25 knots and has 15 knot cruising speed. The ship is much better armed and protected than the Nassau type. This is the Springsharp report:

Ger/BB/1905 anachronistic, Germany Battleship laid down 1908 (Engine 1911)

Displacement:
 17,913 t light; 19,019 t standard; 20,828 t normal; 22,275 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (490.00 ft / 490.00 ft) x 90.00 ft x (29.00 / 30.61 ft)
 (149.35 m / 149.35 m) x 27.43 m  x (8.84 / 9.33 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 871.37lbs / 395.24kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts , 1908 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      12 - 6.00" / 152 mm 45.0 cal guns - 108.92lbs / 49.41kg shells, 150 per gun
   Quick firing guns in casemate mounts , 1908 Model
   12 x Single mounts on sides, forward deck aft
 Weight of broadside 8,278 lbs / 8,278 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 310.00 ft / 94.49 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 8.00" / 203 mm 310.00 ft / 94.49 m 8.00 ft / 2.44 m
   Main Belt covers 97 % of normal length

   - Torpedo Bulkhead:
  2.00" / 51 mm 310.00 ft / 94.49 m 29.00 ft / 8.84 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 8.00" / 203 mm 6.00" / 152 mm  12.0" / 305 mm
 2nd: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm

   - Armour deck: 4.00" / 102 mm, Conning tower: 12.00" / 305 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 59,633 shp / 44,486 Kw = 25.00 kts
 Range 5,600nm at 15.00 kts
 Bunker at max displacement = 3,255 tons

Complement:
 866 - 1,126

Cost:
 £1.678 million / $6.713 million

Distribution of weights at normal displacement:
 Armament: 1,462 tons, 7.0 %
 Armour: 7,388 tons, 35.5 %
    - Belts: 2,223 tons, 10.7 %
    - Torpedo bulkhead: 665 tons, 3.2 %
    - Armament: 1,984 tons, 9.5 %
    - Armour Deck: 2,321 tons, 11.1 %
    - Conning Tower: 196 tons, 0.9 %
 Machinery: 2,420 tons, 11.6 %
 Hull, fittings & equipment: 7,257 tons, 34.8 %
 Fuel, ammunition & stores: 2,915 tons, 14.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   29,590 lbs / 13,422 Kg = 34.2 x 12.0 " / 305 mm shells or 5.3 torpedoes
 Stability (Unstable if below 1.00): 1.20
 Metacentric height 6.0 ft / 1.8 m
 Roll period: 15.4 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.46
 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): 0.570 / 0.577
 Length to Beam Ratio: 5.44 : 1
 'Natural speed' for length: 22.14 kts
 Power going to wave formation at top speed: 59 %
 Trim (Max stability = 0, Max steadiness = 100): 51
 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: 20.00 %,  25.00 ft / 7.62 m,  21.00 ft / 6.40 m
    - Forward deck: 30.00 %,  21.00 ft / 6.40 m,  19.00 ft / 5.79 m
    - Aft deck: 35.00 %,  19.00 ft / 5.79 m,  18.00 ft / 5.49 m
    - Quarter deck: 15.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  19.70 ft / 6.00 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 90.6 %
  - Above water (accommodation/working, high = better): 132.4 %
 Waterplane Area: 31,360 Square feet or 2,913 Square metres
 Displacement factor (Displacement / loading): 110 %
 Structure weight / hull surface area: 163 lbs/sq ft or 794 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.26
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent