Main battery formulas
Shell Grouping (σ)2
Shell grouping (sigma); shown in-game as Shell Grouping.Max Horiz Disp (m)135.5
Horizontal dispersion ellipse width at the ship's max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30.Max Vert Disp (m)81.3
Vertical dispersion ellipse height at max range = horizontal × radiusOnMax.Med Horiz Disp (m)43.3
50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(sigma), the sigma-dependent normal quantile.Med Vert Disp (m)26
50%-hit vertical radius = max vertical × GetHalfHitsRatio(sigma).AP Pen Close (mm)390
0.5561613 * Krupp/2400 * v^1.1 * mass^0.55 / caliber_mm^0.65, with impact velocity from a numerical trajectory integration. Value at 1.5 km.AP Pen Far (mm)191.7
Same model at the ship's max firing range (14.9 km), where the shell has slowed to 406.7 m/s.HE penetration33 mm
floor(203 mm caliber / 6).AP overmatch14 mm
floor(203 mm caliber / 14.3).Broadside guns used for alpha10
All 10 barrels bear on the broadside.Turret turn time45 s
180 degrees / 4 deg/s traverse speed.HE full-salvo alpha33,000
3300 HE damage x 10 broadside guns.AP full-salvo alpha47,000
4700 AP damage x 10 broadside guns.Base HE DPM247,500
HE full-salvo alpha x 60 / base reload.Base AP DPM352,500
AP full-salvo alpha x 60 / base reload.Installed HE DPM330,000
HE full-salvo alpha x 60 / installed Artillery reload.Installed AP DPM470,000
AP full-salvo alpha x 60 / installed Artillery reload.Base shells/min42.9
10 broadside guns x 60 / 14 s base reload.Installed shells/min47.6
10 broadside guns x 60 / 12.6 s installed Artillery reload.Base fires/min7.29
10 HE shells x 60 / 14 s reload x 17% fire chance.Installed fires/min8.1
10 HE shells x 60 / 12.6 s installed reload x 17% fire chance.