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Imperator Nikolai I Class Battleship
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Imperator Nikolai I is a modification of the Imperatritsia Maria Class.


Imperator Nikolai, laid down 1913
     Length, 181.0 m x Beam, 28.8 m x Depth, 9.0 m
          25069 tonnes normal displacement (23472 tonnes standard)
     Main battery:      12 x 30.5-cm (4 x 3)
     Secondary battery: 10 x 13.0-cm
     QF battery:         5 x  7.6-cm
     Light battery:      4 x  4.7-cm
          Weight of broadside: 5063 kg
     4 TT, 47.0 cm
     Main belt, 30.5 cm; bow and stern, 13.0 cm
     Upper belt, 20.3 cm
     Torpedo bulkhead, 5.0 cm
     Armor deck, average 11.0 cm
     Conning tower, 30.5 cm
     Battery armor:
          Main, 30.5 cm / secondary, 20.3 cm
          QF, 2.5 cm shields 
     Maximum speed for 22810 shaft kw = 21.00 knots
          Approximate cruising radius, 3000 nm / 16 knots
     Typical complement: 996-1295

                    Estimated cost, $9.275 million (2.319 million)
          Remarks:
     Relative extent of belt armor, 80 percent of 'typical' coverage.
     Ship has slow, easy roll; a good, steady gun platform.
     Good seaboat; rides out heavy weather easily.
     Magazines and engineering spaces are roomy, with superior
     watertight subdivision.
     Ship is roomy, with superior accommodation and working space.
     Main deck secondary guns subject to being washed down
     in a seaway.

          Distribution of weights:
                                                       Percent
                                                       normal
                                                    displacement:
          Armament .........................   1392 tonnes =   6 pct
          Armor, total .....................   9899 tonnes =  39 pct
               Belt                            3096 tonnes =  12 pct
               Torpedo bulkhead                 830 tonnes =   3 pct
               Deck                            2936 tonnes =  12 pct
               C.T.                             222 tonnes =   1 pct
               Armament                        2814 tonnes =  11 pct
          Machinery ........................   1317 tonnes =   5 pct
          Hull and fittings; equipment .....   9434 tonnes =  38 pct
          Fuel, ammunition, stores .........   3027 tonnes =  12 pct
          Miscellaneous weights ............      0 tonnes =   0 pct
                                              -----
                                              25069 tonnes = 100 pct
          Estimated metacentric height, 1.7 m
     Displacement summary:
          Light ship:             22042 tonnes
          Standard displacement:  23472 tonnes
          Normal service:         25069 tonnes
          Full load:              26247 tonnes
          Loading submergence 3435 tonnes/metre
     +++++++++++++++++++++++++

     Estimated overall survivability and seakeeping ability:
          Relative margin of stability: 1.12
          Shellfire needed to sink: 13944 kg = 35.4 x 30.5-cm shells
               (Approximates weight of penetrating
               shell hits needed to sink ship,
               not counting critical hits)
          Torpedoes needed to sink: 5.3
               (Approximates number of 'typical'
               torpedo hits needed to sink ship)
          Relative steadiness as gun platform, 70 percent
               (50 percent is 'average')
          Relative rocking effect from firing to beam, 0.55
          Relative quality as a seaboat: 1.47
     +++++++++++++++++++++++++

     Hull form characteristics:
          Block coefficient: 0.53
          Sharpness coefficient: 0.40
          Hull speed coefficient 'M' = 6.21
          'Natural speed' for length = 24.4 knots
          Power going to wave formation
               at top speed: 42 percent

     Estimated hull characteristics and strength:
          Relative underwater volume absorbed by
               magazines and engineering spaces: 77 percent
          Relative accommodation and working space: 126 percent

          Displacement factor: 107 percent
               (Displacement relative to loading factors)

          Relative cross-sectional hull strength: 0.98
               (Structure weight per square
               metre of hull surface: 875 kg)
          Relative longitudinal hull strength: 1.64
               (for 5.70 m average freeboard;
               freeboard adjustment +0.15 m)
          Relative composite hull strength: 1.03
     +++++++++++++++++++++++++

[Machine-readable parameters: Spring Style v. 1.2.1]
593.68 x 94.46 x 29.52; 18.70 -- Dimensions
0.53 -- Block coefficient
1913 -- Year laid down
21.00 / 3000 / 16.00; Turbine, coal fired -- Speed / radius / cruise
 0 tons -- Miscellaneous weights
++++++++++
12 x 12.01; 4; 0 -- Main battery; turrets; superfiring
   :
10 x 5.12; 0 -- Secondary battery; turrets
  Main deck battery
   :
5 x 2.99 -- Tertiary (QF/AA) battery
  Gun-shields
   :
4 x 1.85 -- Fourth (light) battery
4 / 0 / 18.50 -- TT / submerged / size
++++++++++
12.01 / 5.12 / 7.99 / 1.97; 80 -- Belt armor; relative extent
4.33 / 12.01 -- Deck / CT
12.01 / 7.99 / 0.98 / 0.00 -- Battery armor

     (Note: For portability, values are stored in Anglo-American units)

     +++++++++++++++++++++++++++++++++++++++++++++++++++++++


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