The very compact battleship: Ger/BB/1915

The Ger/BB/1915 was intended to be a 30,000 ton ship, full load. The hull is flush-decked and the armament is in two triple turrets forward. The citadel is very short (330ft), which is much of the point of this ship. The armament is 6-16.5in BLR and 16-5in QF guns. The speed is modest at 21 knots and the armour basis is 14in. This is the Springsharp report:

Ger/BB/1915 Compact, Germany Battleship laid down 1915 (Engine 1927)

Displacement:
 27,524 t light; 28,866 t standard; 30,400 t normal; 31,627 t full load

Dimensions: Length overall / water x beam x draught
 626.89 ft / 625.00 ft x 104.00 ft x 28.00 ft (normal load)
 191.08 m / 190.50 m x 31.70 m  x 8.53 m

Armament:
      6 - 16.50" / 419 mm guns (2x3 guns), 2,246.06lbs / 1,018.80kg shells, 1915 Model
   Breech loading guns in turrets (on barbettes)
   on centreline, all forward, 1 raised mount - superfiring
      4 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1915 Model
   Quick firing guns in deck mounts with hoists
   on side, all amidships, all raised mounts - superfiring
      12 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1915 Model
   Quick firing guns in casemate mounts 
   on side, evenly spread
 Weight of broadside 14,476 lbs / 6,566 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 14.0" / 356 mm 330.00 ft / 100.58 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 81 % of normal length

   - Torpedo Bulkhead:
  4.00" / 102 mm 330.00 ft / 100.58 m 28.00 ft / 8.53 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 14.0" / 356 mm 9.00" / 229 mm  14.0" / 356 mm
 3rd: 5.00" / 127 mm 5.00" / 127 mm  5.00" / 127 mm

   - Armour deck: 4.00" / 102 mm, Conning tower: 14.00" / 356 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 34,954 shp / 26,076 Kw = 21.00 kts
 Range 5,600nm at 15.00 kts
 Bunker at max displacement = 2,762 tons

Complement:
 1,150 - 1,496

Cost:
 £3.837 million / $15.347 million

Distribution of weights at normal displacement:
 Armament: 1,810 tons, 6.0 %
 Armour: 11,248 tons, 37.0 %
    - Belts: 3,431 tons, 11.3 %
    - Torpedo bulkhead: 1,368 tons, 4.5 %
    - Armament: 2,687 tons, 8.8 %
    - Armour Deck: 3,468 tons, 11.4 %
    - Conning Tower: 294 tons, 1.0 %
 Machinery: 1,103 tons, 3.6 %
 Hull, fittings & equipment: 13,363 tons, 44.0 %
 Fuel, ammunition & stores: 2,876 tons, 9.5 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   57,409 lbs / 26,040 Kg = 25.6 x 16.5 " / 419 mm shells or 11.7 torpedoes
 Stability (Unstable if below 1.00): 1.09
 Metacentric height 6.2 ft / 1.9 m
 Roll period: 17.5 seconds
 Steadiness - As gun platform (Average = 50 %): 90 %
   - Recoil effect (Restricted arc if above 1.00): 0.87
 Seaboat quality  (Average = 1.00): 1.81

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.585
 Length to Beam Ratio: 6.01 : 1
 'Natural speed' for length: 25.00 kts
 Power going to wave formation at top speed: 42 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 4.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  27.00 ft / 8.23 m
    - Forecastle (20 %): 24.00 ft / 7.32 m
    - Mid (50 %):  24.00 ft / 7.32 m
    - Quarterdeck (15 %): 24.00 ft / 7.32 m
    - Stern:  24.00 ft / 7.32 m
    - Average freeboard: 24.24 ft / 7.39 m
 Ship tends to be wet forward

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 70.3 %
  - Above water (accommodation/working, high = better): 186.3 %
 Waterplane Area: 46,860 Square feet or 4,353 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 207 lbs/sq ft or 1,009 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.20
  - 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