Main battery formulas
Shell Grouping (σ)2
Shell grouping (sigma); shown in-game as Shell Grouping.Max Horiz Disp236 m
Horizontal dispersion ellipse width at the ship's max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30.Max Vert Disp141.6 m
Vertical dispersion ellipse height at max range = horizontal × radiusOnMax.Med Horiz Disp75.4 m
50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(sigma), the sigma-dependent normal quantile.Med Vert Disp45.2 m
50%-hit vertical radius = max vertical × GetHalfHitsRatio(sigma).HE penetration68 mm
68 mm ≈ 406 mm caliber / 6 (standard HE penetration ratio).AP overmatch28 mm
floor(406 mm caliber / 14.3).AP AOE Radius250
AP shell over-penetration splash radius; scales with shell mass. Wickes 102mm = 3, standard 152mm CL ~ 20, Iowa 406mm ~ 270, Yamato 460mm = 400, Incomparable 650mm = 550 (max). Larger value = bigger splash damage area when AP over-pens.Broadside guns used for alpha9
All 9 barrels bear on the broadside.Turret turn time18 s
180 degrees / 10 deg/s traverse speed.HE full-salvo alpha48,195
5,355 HE damage x 9 broadside guns.AP full-salvo alpha124,740
13,860 AP damage x 9 broadside guns.Base HE DPM96,390
HE full-salvo alpha x 60 / base reload.Base AP DPM249,480
AP full-salvo alpha x 60 / base reload.Installed HE DPM107,100
HE full-salvo alpha x 60 / installed Artillery reload (Main Battery Mod. 3 = -10% reload).Installed AP DPM277,200
AP full-salvo alpha x 60 / installed Artillery reload (Main Battery Mod. 3 = -10% reload).Base shells/min18
9 broadside guns x 60 / 30 s base reload.Installed shells/min20
9 broadside guns x 60 / 27 s installed Artillery reload.Base fires/min7.2
9 HE shells x 60 / 30 s reload x 40% fire chance.Installed fires/min8
9 HE shells x 60 / 27 s installed reload x 40% fire chance.