Hit Points7,600
Displacement835 t
Hull dimensions ƒ
Length x beam at the waterline, plus draft. Length matters when dodging torpedoes; beam and draft shape how hard the ship is to hit.
Armor range6–10 mm
Plate armor thicknesses6, 9, 10 mm
Armor material/layer entries22
Fire resistance ƒ
top hull: 1 − 0.9667 fire coefficient = 3.3%. Lowers how often hits set you on fire. It does not reduce the damage a burning fire does per second; fires burn at the full rate on every ship.
Fire duration30 s
Fire damage ƒ
One unattended fire: 0.003 of max HP per second (0.3%) × 30 s = 0.09 of the pool; 0.09 × 7,600 HP = 684 HP on this ship. 4 fire points can burn at once.
Flood duration40 s
Flood damage ƒ
One unattended flood: 0.0025 of max HP per second (0.25%) × 40 s = 0.1 of the pool; 0.1 × 7,600 HP = 760 HP on this ship.
Torp Reduction ƒ
1 − 0.333 hull torpedo-damage coefficient / 0.333 unprotected baseline = 0%. Reduces torpedo hit damage. It does not affect flooding: floods start as often and tick at the full rate.
Magazine HP ƒ
Per-turret powder-magazine HP, a separate pool from the ship's. Penetrating hits wear it down and the turret is likelier to be knocked out as it falls, so a larger pool keeps the guns firing through punishment that silences a peer's.
Steering gear HP ƒ
Durability of the steering gears. As this pool drops, hits are likelier to jam the rudder; unlike most modules the steering can be knocked out and repaired but is never permanently destroyed.
Repairable: penetration50%
Repairable: steering gear50%
Bow section HP ƒ
Damage saturation pool for the bow: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 600 = 1,200), then further hits on it deal half damage. A penetration deals 0.33 × the shell's max damage; once the section is saturated it deals exactly half of that (0.5 × 0.33 = 0.165 × max damage), so a 3,000-damage shell's pen goes from 990 to 495. Overpens (0.1 × max damage) and citadels (1.0 ×) ignore saturation. Pens on the ship's other, unsaturated sections still deal the normal 0.33 ×. A larger pool keeps that part of the ship taking full damage for longer; a small one saturates fast and protects the ship's HP.
Casemate section HP ƒ
This section has no practical saturation cap: every hit here keeps dealing its normal share of damage (on most ships the citadel; on many destroyers the casemate).
Hull section HP ƒ
Damage saturation pool for the hull: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 5,700 = 11,400), then further hits on it deal half damage. A penetration deals 0.33 × the shell's max damage; once the section is saturated it deals exactly half of that (0.5 × 0.33 = 0.165 × max damage), so a 3,000-damage shell's pen goes from 990 to 495. Overpens (0.1 × max damage) and citadels (1.0 ×) ignore saturation. Pens on the ship's other, unsaturated sections still deal the normal 0.33 ×. A larger pool keeps that part of the ship taking full damage for longer; a small one saturates fast and protects the ship's HP.
Superstructure section HP ƒ
Damage saturation pool for the superstructure: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 200 = 400), then further hits on it deal half damage. A penetration deals 0.33 × the shell's max damage; once the section is saturated it deals exactly half of that (0.5 × 0.33 = 0.165 × max damage), so a 3,000-damage shell's pen goes from 990 to 495. Overpens (0.1 × max damage) and citadels (1.0 ×) ignore saturation. Pens on the ship's other, unsaturated sections still deal the normal 0.33 ×. The superstructure is not exempt: it saturates exactly like the bow and stern, so shells aimed at it stop dealing full damage once this pool is used up. A larger pool keeps that part of the ship taking full damage for longer; a small one saturates fast and protects the ship's HP.
Stern section HP ƒ
Damage saturation pool for the stern: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 400 = 800), then further hits on it deal half damage. A penetration deals 0.33 × the shell's max damage; once the section is saturated it deals exactly half of that (0.5 × 0.33 = 0.165 × max damage), so a 3,000-damage shell's pen goes from 990 to 495. Overpens (0.1 × max damage) and citadels (1.0 ×) ignore saturation. Pens on the ship's other, unsaturated sections still deal the normal 0.33 ×. A larger pool keeps that part of the ship taking full damage for longer; a small one saturates fast and protects the ship's HP.
ModuleArtillery: 100 mm/45 Mle 1921
Mounts / barrels3 mounts / 3 barrels
Reload time5.2 s
Firing range8.8 km
Turret traverse20 °/s
Turret armor3 mm
Turret traverse arcs ƒ
How far each mount can train, in degrees to either side of the mount's own facing. A rear turret with ±150° leaves a 60° blind wedge over the bow; one-sided arcs are wing mounts that cover a single side. The data does not say which way each mount faces, so the arcs are listed per mount without bow/stern angles.
Guns to bear ƒ
180° − 140° (the most restricted aft-facing mount's arc) = 40° off bow; 180° − 129° (the most restricted forward-facing mount's arc) = 51° off stern. How far off the bow (or stern) the ship must angle before every main turret can fire: the widest blind wedge among the rear-facing (or forward-facing) mounts, from each mount's trainable arc.
Shell Grouping (σ)2
Dispersion type ƒ
In practice: the baseline curve for a standard destroyer -- at max range (8.8 km) shells land in an ellipse about 81 m wide and 48 m tall. Also on this curve (225): AL Avrora, AL Yukikaze, AL Z24, Acasta, Achilles, Adriatico, Aigle, Akatsuki, Akizuki, Albany, Allen M. Sumner, Attilio Regolo and 213 more.
Max Horiz Disp ƒ
Horizontal dispersion ellipse width at max range, from the dispersion model:
Max Vert Disp ƒ
Vertical dispersion ellipse height at max range:
Med Horiz Disp ƒ
50%-hit horizontal radius:
Med Vert Disp ƒ
50%-hit vertical radius:
Turret turn time ƒ
180 degrees / 20 deg/s traverse speed = 9 s.
Shells/min ƒ
3 broadside guns x 60 / 5.286 s (5.2 s = 37 ticks) base reload = 34.1.
HE shells
HE alpha1,400
HE Velocity780 m/s
Fire Chance6%
HE penetration ƒ
17 mm ≈ 100 mm caliber / 6 (standard HE penetration ratio).
HE full-salvo alpha ƒ
1,400 HE damage x 3 broadside guns = 4,200.
HE DPM ƒ
4,200 HE full-salvo alpha x 60 / 5.286 s (5.2 s = 37 ticks) base reload = 47,676.
Fires/min ƒ
34.1 shells/min × 0.06 (6% fire chance) = 2.04.
AP shells
AP alpha1,600
AP Velocity780 m/s
Min Ricochet45 deg
Guaranteed Ricochet60 deg
Fuse Timer0.025 s
Fuse Threshold17 mm
AP overmatch ƒ
floor(100 mm caliber / 14.3) = 6 mm (AP auto-penetrates plating this thick or less).
AP Pen Close ƒ
AP formula evaluated at muzzle velocity: .
AP Pen Far ƒ
Same formula at the ship's max firing range (8.8 km), where the shell has slowed to 306.9 m/s: .
AP full-salvo alpha ƒ
1,600 AP damage x 3 broadside guns = 4,800.
AP DPM ƒ
4,800 AP full-salvo alpha x 60 / 5.286 s (5.2 s = 37 ticks) base reload = 54,486.
AP AOE Radius ƒ
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.
ModuleTorpedoes: 550 mm lance-torpilles
Launchers / tubes2 launchers × 2 tubes = 4 tubes
Reload time35 s
Projectile speed52.0 kt
Range6.99 km
Maximum simulated damage ƒ
Most targets only intersect one hull section, so a hit transfers about 1/3 of the warhead alpha (2/3 when the warhead blast >= 5000 and the burst reaches a second section). For this ship: . In battle, a hit on the torpedo belt deals the per-hit figure × (1 − the target's torpedo protection %), a bow or stern hit deals it in full, and a torpedo never counts as a citadel hit.
Maximum damage (ammunition) ƒ
19,900 warhead alpha / 3 + 800 blast = 7,433. Warhead alpha / 3 plus the blast addend: the per-torpedo damage figure. The 'Maximum simulated damage' row above applies target geometry to the same warhead.
Torpedo module damage ƒ
Per-torpedo module/blast damage parameter. Most torpedoes carry 500 to 2,000; ships announced by WG as dealing increased module damage carry 9,000 to 12,000, so their hits knock out engines, rudders, and turrets far more often. Comparative figure.
Torpedo detectability1.2 km
Reaction time ƒ
How long a target has to dodge after your torpedo is spotted at its detectability range (lower means less warning): . 2.6855 converts knots to m/s on the game clock. Base value; commander torpedo-concealment skills lower it further.
Flooding chance ƒ
This torpedo carries a flooding-chance value of 1.15 per hit, shown as . Values above 100% are normal: in battle the base chance is scaled down by the target's torpedo protection (the Torp Reduction stat on its Survivability card) and any flood-resistance modifiers, so a value above 100% keeps flooding likely even through partial protection.
Torpedo launcher traverse25 °/s
Launch arcscentreline 282°, 284°
Torp Turn ƒ
Time to rotate the launchers 180 deg: .
Torp Arming170 m
Per-side salvo damage ƒ
One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 4 x 6,633 = 26,532. Each hit on the target's torpedo belt is reduced by its torpedo protection %.
Maneuverability
Engine power20,000 hp
Maximum speed31.0 kt
Turning circle radius450 m
Rudder shift time2 s
Engine power-boost threshold7.0 kt
Engine spool-up time7.7 s
Reverse spool-up time3.8 s
Reverse speed ƒ
top speed / 4 + 4.9 = 31 / 4 + 4.9 = 12.7 kt. Base value; speed modifiers scale it.
Crash stop ƒ
Seconds from top speed to a dead stop after ordering full reverse: reverse power winds in over the reverse spool-up while water drag does most of the braking, using the ship's own reverse-power ratio. The full curve is on the acceleration chart. Full reverse stops about a quarter faster than a plain Stop order from top speed.
Engine boost threshold (reverse) ƒ
Speed below which the engine's built-in power boost applies in reverse.
Acceleration 0-90% ƒ
Time to reach 90% of top speed (27.9 kt of 31.0 kt).
Acceleration 0-99% ƒ
Time to reach 99% of top speed (30.7 kt of 31.0 kt). 99% rather than 100% because true top speed is asymptotic (thrust meets drag), so the last fraction of a knot is never quite gained.
Guns in a full turn ƒ
With the rudder hard over the hull turns 8.9°/s, so a target drifts across the bow at that rate. Turret traverse minus hull turn: 20 − 8.9 = +11.1°/s, so the guns hold the target through the turn. Main Battery Mod. 2 (+20% traverse) and Mod. 3 (−15%) move this line.
Detectability by sea ƒ
Base value, no camouflage. With a Grade IV permanent camo (or any disposable camo): 5.55 km x 0.955 = 5.3 km. Camouflage does not change detectability by air.
With Grade IV camouflage (sea) ƒ
Detectability by sea 5.55 km x 0.955 (Grade IV permanent camo or any disposable camo) = 5.3 km.
Detectability by air2.78 km
Smoke firing penalty2 km
Detect when firing (sea) ƒ
max(main battery range, sea detectability 5.55 km) = 8.75 km. Equal to the ship's main battery range (never below base detectability): firing makes you visible to everyone you can reach.
Detect when firing (air) ƒ
Air detectability 2.78 km + gun-firing bloom 2 km = 4.78 km. The bloom tracks main-battery caliber 100 mm × 0.020 = 2 km.
Detect when on fire (sea) ƒ
Sea detectability 5.55 km + 2.0 km while burning = 7.55 km.
Detect when on fire (air) ƒ
Air detectability 2.78 km + 3.0 km while burning = 5.78 km.
Guaranteed Detect2 km
Damage Control Party∞ charges · 40 s reload · 5 s active
Engine Boost2 charges · 180 s reload · 120 s active · +20% speed bonus
