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Capital Ship Combat Effectiveness

This simple program calculates a rough stimation of the combat effectiveness of a given capital ship against other similar ships. The program evaluates the artillery batteries and the main armor components and determines a veredict for both long and short range engagements. Anti-aircraft dedicated weapons are not counted in the stats. The rather simplistic algorithm takes into account the following parameters:

For offensive rating: number of guns, caliber, muzzle speed and rate of fire for each artillery battery.

For defensive rating: thickness, angle and average quality for thickest armor plates used in main belt, main deck, barbettes, face of main turrets and conning tower.

How calculating long-range and short-range effectiveness are made different? When calculating short-range effectiveness, all the anti-ship artillery is included in the count (not only the main cannons), main deck armor is ignored and slopes with negative angles take full effectiveness. I think there is no need to say that these ratings are just intended for entertainment purposes, albeit obviously they can give a quite accurate idea of the underlying truth.

How many other factors would describe a more realist study? Certainly many: speed, fire control, ammunitions, armor disposition, etc, etc... For example, in short-range calculation Knyaz Suvorov beats HMS Dreadnought, just because the former has lots of smaller caliber guns which matematically compensate for her weak pre-dreadnought main armament, but which in practice are unable to pierce thru thick armor plates. It would be indeed hard to believe that a pre-dreadnought battleship would beat a dreadnought one in normal conditions, albeit not impossible.

Below there is a list showing the values for some well-known historical capital ships. The higher the number, the higher the effectiveness of the warship to inflict damage in other ships and to withstand damage received by naval guns.




Battleship Yamato (1945)
Overall rating: 385
Offensive rating: 102
Defensive rating: 283
Battleship Iowa (1943)
Overall rating: 353
Offensive rating: 89
Defensive rating: 264
Battleship Richelieu (1940)
Overall rating: 302
Offensive rating: 68
Defensive rating: 234
Battleship Bismarck (1941)
Overall rating: 293
Offensive rating: 97
Defensive rating: 196
Battleship Nelson (1942)
Overall rating: 289
Offensive rating: 69
Defensive rating: 220
Battlecruiser Scharnhorst (1940)
Overall rating: 278
Offensive rating: 86
Defensive rating: 192
Battleship Baden (1917)
Overall rating: 273
Offensive rating: 94
Defensive rating: 179
Battleship Mutsu (1921)
Overall rating: 256
Offensive rating: 83
Defensive rating: 173
Battleship Vittorio Veneto (1940)
Overall rating: 255
Offensive rating: 57
Defensive rating: 198
Battleship King George V (1940)
Overall rating: 243
Offensive rating: 75
Defensive rating: 168
Battlecruiser Hood (1941)
Overall rating: 220
Offensive rating: 65
Defensive rating: 155
Battleship Viribus Unitis (1912)
Overall rating: 211
Offensive rating: 53
Defensive rating: 158
Battlecruiser Derfflinger (1914)
Overall rating: 203
Offensive rating: 62
Defensive rating: 141
Battleship Queen Elizabeth (1915)
Overall rating: 202
Offensive rating: 58
Defensive rating: 144
Battleship Dreadnought (1906)
Overall rating: 180
Offensive rating: 46
Defensive rating: 134
Battleship Knyaz Suvorov (1904)
Overall rating: 128
Offensive rating: 17
Defensive rating: 111