My later model small, fast battleship: the It/BB/1933

The It/BB/1933 design has the usual 10-12.6in guns in the main armament, but it also has 4-triple 5.3in DP turrets and 16-4in AA guns in twin turrets. The LAA armament is now 32-37mm AA guns in twin mounts. The speed is still 28 knots, but the range is now 5,400nm at 15 knots. The side armour is still 12in, but the deck armour is now 5in and the torpedo bulkhead is 4in. This is the Springsharp report:

It/BB/1933, Italy Battleship laid down 1933 (Engine 1941)

Displacement:
 30,353 t light; 31,602 t standard; 33,000 t normal; 34,118 t full load

Dimensions: Length overall / water x beam x draught
 686.45 ft / 684.00 ft x 102.00 ft x 27.00 ft (normal load)
 209.23 m / 208.48 m x 31.09 m  x 8.23 m

Armament:
      10 - 12.60" / 320 mm guns (4 mounts), 1,000.19lbs / 453.68kg shells, 1933 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      12 - 5.30" / 135 mm guns (4x3 guns), 74.44lbs / 33.76kg shells, 1933 Model
   Dual purpose guns in turrets (on barbettes)
   on side, all amidships, 2 raised mounts - superfiring
      16 - 4.00" / 102 mm guns (8x2 guns), 32.00lbs / 14.51kg shells, 1933 Model
   Anti-aircraft guns in turrets (on barbettes)
   on side, all amidships
      32 - 1.46" / 37.0 mm guns (16x2 guns), 1.55lbs / 0.70kg shells, 1933 Model
   Breech loading guns in deck mounts 
   on side, evenly spread, all raised mounts
 Weight of broadside 11,457 lbs / 5,197 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 12.0" / 305 mm 380.00 ft / 115.82 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 9.00" / 229 mm 380.00 ft / 115.82 m 8.00 ft / 2.44 m
   Main Belt covers 85 % of normal length

   - Torpedo Bulkhead:
  4.00" / 102 mm 380.00 ft / 115.82 m 27.00 ft / 8.23 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 12.0" / 305 mm 9.00" / 229 mm  12.0" / 305 mm
 2nd: 5.00" / 127 mm 5.00" / 127 mm  5.00" / 127 mm
 3rd: 1.00" / 25 mm 1.00" / 25 mm  1.00" / 25 mm

   - Armour deck: 5.00" / 127 mm, Conning tower: 12.00" / 305 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 109,006 shp / 81,319 Kw = 28.00 kts
 Range 5,400nm at 15.00 kts
 Bunker at max displacement = 2,516 tons

Complement:
 1,223 - 1,591

Cost:
 £12.615 million / $50.461 million

Distribution of weights at normal displacement:
 Armament: 1,432 tons, 4.3 %
 Armour: 13,008 tons, 39.4 %
    - Belts: 2,879 tons, 8.7 %
    - Torpedo bulkhead: 1,518 tons, 4.6 %
    - Armament: 3,567 tons, 10.8 %
    - Armour Deck: 4,778 tons, 14.5 %
    - Conning Tower: 266 tons, 0.8 %
 Machinery: 2,881 tons, 8.7 %
 Hull, fittings & equipment: 13,032 tons, 39.5 %
 Fuel, ammunition & stores: 2,647 tons, 8.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   57,997 lbs / 26,307 Kg = 58.0 x 12.6 " / 320 mm shells or 10.9 torpedoes
 Stability (Unstable if below 1.00): 1.09
 Metacentric height 6.1 ft / 1.9 m
 Roll period: 17.3 seconds
 Steadiness - As gun platform (Average = 50 %): 55 %
   - Recoil effect (Restricted arc if above 1.00): 0.53
 Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.613
 Length to Beam Ratio: 6.71 : 1
 'Natural speed' for length: 26.15 kts
 Power going to wave formation at top speed: 54 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 5.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  28.00 ft / 8.53 m
    - Forecastle (20 %): 26.00 ft / 7.92 m
    - Mid (67 %):  26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
    - Quarterdeck (15 %): 18.00 ft / 5.49 m
    - Stern:  18.00 ft / 5.49 m
    - Average freeboard: 23.52 ft / 7.17 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 76.4 %
  - Above water (accommodation/working, high = better): 191.4 %
 Waterplane Area: 51,656 Square feet or 4,799 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 185 lbs/sq ft or 902 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.97
  - Longitudinal: 1.42
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent