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De Grasse Class Light Cruisers
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The De Grasse Class are the newest cruisers entering French service.

DeGrasse Class Light Cruisers, laid down 1919
     Length, 168.0 m x Beam, 17.0 m x Depth, 7.0 m
          8869 tonnes normal displacement (8040 tonnes standard)
     Main battery:       8 x 15.2-cm (4 x 2; 1 superfiring)
     Secondary battery: 12 x 10.0-cm
     AA battery:         8 x  4.0-cm
     Light battery:      4 x  1.3-cm
          Weight of broadside: 561 kg
     4 TT, 53.0 cm
     Main belt, 5.0 cm; bow and stern, 2.0 cm
     Armor deck, average 2.0 cm
     Conning tower, 8.0 cm
     Battery armor:
          Main, 7.0 cm / secondary, 2.0 cm
          
     Maximum speed for 66644 shaft kw = 33.00 knots
          Approximate cruising radius, 6000 nm / 15 knots
     Typical complement: 457-594

                    Estimated cost, $7.377 million (1.844 million)
          Remarks:
     Oil firing.
     Relative extent of belt armor, 127 percent of 'typical' coverage.
     Main belt does not fully protect magazines and
     engineering spaces.
     Ship has slow, easy roll; a good, steady gun platform.
     Good seaboat; rides out heavy weather easily.
     Magazines and engineering spaces are cramped, with poor
     watertight subdivision.
     Roomy upper decks; superior accommodation and working space.
     Main deck secondary guns subject to being washed down
     in a seaway.

          Distribution of weights:
                                                       Percent
                                                       normal
                                                    displacement:
          Armament .........................    154 tonnes =   2 pct
          Armor, total .....................    931 tonnes =  10 pct
               Belt                             393 tonnes =   4 pct
               Deck                             258 tonnes =   3 pct
               C.T.                              29 tonnes =   0 pct
               Armament                         250 tonnes =   3 pct
          Machinery ........................   3171 tonnes =  36 pct
          Hull and fittings; equipment .....   3404 tonnes =  38 pct
          Fuel, ammunition, stores .........   1109 tonnes =  13 pct
          Miscellaneous weights ............    100 tonnes =   1 pct
                                              -----
                                               8869 tonnes = 100 pct
          Estimated metacentric height, 0.8 m
     Displacement summary:
          Light ship:              7760 tonnes
          Standard displacement:   8040 tonnes
          Normal service:          8869 tonnes
          Full load:               9496 tonnes
          Loading submergence 1661 tonnes/metre
     +++++++++++++++++++++++++

     Estimated overall survivability and seakeeping ability:
          Relative margin of stability: 1.14
          Shellfire needed to sink: 2751 kg = 56.6 x 15.2-cm shells
               (Approximates weight of penetrating
               shell hits needed to sink ship,
               not counting critical hits)
          Torpedoes needed to sink: 1.0
               (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, 0.46
          Relative quality as a seaboat: 1.21
     +++++++++++++++++++++++++

     Hull form characteristics:
          Block coefficient: 0.44
          Sharpness coefficient: 0.31
          Hull speed coefficient 'M' = 8.14
          'Natural speed' for length = 23.5 knots
          Power going to wave formation
               at top speed: 58 percent

     Estimated hull characteristics and strength:
          Relative underwater volume absorbed by
               magazines and engineering spaces: 131 percent
          Relative accommodation and working space: 144 percent

          Displacement factor: 103 percent
               (Displacement relative to loading factors)

          Relative cross-sectional hull strength: 0.95
               (Structure weight per square
               metre of hull surface: 495 kg)
          Relative longitudinal hull strength: 1.78
               (for 6.30 m average freeboard;
               freeboard adjustment +1.79 m)
          Relative composite hull strength: 1.01
     +++++++++++++++++++++++++

[Machine-readable parameters: Spring Style v. 1.2.1]
551.04 x 55.76 x 22.96; 20.66 -- Dimensions
0.44 -- Block coefficient
1919 -- Year laid down
33.00 / 6000 / 15.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
100 tons -- Miscellaneous weights
++++++++++
8 x 5.98; 4; 1 -- Main battery; turrets; superfiring
   :
12 x 3.94; 0 -- Secondary battery; turrets
  Main deck battery
   :
8 x 1.57 -- Tertiary (QF/AA) battery
   :
4 x 0.51 -- Fourth (light) battery
4 / 0 / 20.87 -- TT / submerged / size
++++++++++
1.97 / 0.79 / 0.00 / 0.00; 127 -- Belt armor; relative extent
0.79 / 3.15 -- Deck / CT
2.76 / 0.79 / 0.00 / 0.00 -- Battery armor

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

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


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