GamingDiver / WoWs Legends Ships / Storm Lantern

World of Warships: Legends ship guide

Storm Lantern

Also called: 风暴灯笼 · Sturmlaterne Beta

Pan-Asia · Tier VI · Destroyer · Premium / event variant · Grom Variant

Deep-water torpedo destroyerDeep-water torpedoes ignore destroyers; save them for cruisers and battleships.

Playstyle

Sit at the edge of a contested cap from concealment and cycle torpedo waves into lanes the enemy has to use - 7.5 km reach at 72 kt closes the gap fast, though at about 8.3 s of warning the wall works by denying lanes rather than by catching anyone unaware
Avoid: Holding 7.5-km torpedoes for a perfect shot

Key characteristics

Long, heavy torpedoes (12 km)Radar (7.5 km)SmokeTorp Reload BoosterEngine BoostSlow reload

On this page

Community stats
Playstyle
How to get Storm Lantern
Builds
Cohort position
Stats and specs
Charts
Background
Armor
Exteriors

Community Data

Storm Lantern Community Stats

Across 710+ Standard battles from 84 players, Storm Lantern averages a 68% win rate, 49,700 damage and 1.3 kills per battle, and survives 50% of them.

Community Data

Storm Lantern Community Stats

Log in to GamingDiver and upload your data to see Community Data for Storm Lantern: community win rate, damage, survival, spotting, and your own comparison.

Playstyle

Overview

Grom is a Tier VI European torpedo destroyer reaching 7.5 km. The torpedoes travel at 72 kt, so target reaction time is short - but WG builds her as a gun-and-torpedo hybrid: four hard-hitting HE guns provide the steady damage while the quick, short-lane torpedoes punish anyone who closes. Standout traits: top-decile quick acceleration in T6 DDs (8 s).

Positioning

Sit at the edge of a contested cap from concealment and cycle torpedo waves into lanes the enemy has to use - 7.5 km reach at 72 kt closes the gap fast, though at about 8.3 s of warning the wall works by denying lanes rather than by catching anyone unaware. Drop on probable lanes from cover, stay unspotted between waves, and let the wall do the work. With only HE, aim at superstructures and upper-hull sections where it does full damage instead of shattering on heavy belt armor.

Potato Avoidance

Holding 7.5-km torpedoes for a perfect shot

The kit pays out by saturating lanes, not by waiting for guaranteed broadsides; missed waves still force rotations and protect your team's flank. Idle torpedo tubes are the worst output state.

Signature Traits

Improved HE penetration

HE pen at the 1/4 caliber ratio instead of the standard 1/6. HE-spam is a real damage option here, not just a fire-starter, shared by 5/41 T6 DDs.

Deep-water torpedoes

Torps IGNORE the Destroyer class (deep-water mechanic); they pass under DDs and cannot hit them. Aim ONLY at battleships, carriers, and most cruisers; every torp fired at a DD is wasted, shared by 3/41 T6 DDs.

Surveillance Radar

7.5 km range, 15 s duration. Detects all enemy ships within a fixed radius regardless of line-of-sight. A short scan - long enough to break a smoke camp or call a target for the team, not to hold a cap.

Engine Boost

+5% speed (about +1.9 kt), 100 s duration. Engine Boost consumable gives a small speed nudge - useful for closing a gap or steadying a torpedo run, not for running anything down.

ELITE TORPEDOES ↗

Heavy torpedoes · 22367 damage
Long-range torps · 12 km
Short torpedo warning · 6.1 s
Module-wrecking torpedoes · 1400 torpedo

Slow reload ↗

7.5 s reload, bottom decile of T6 DDs. Salvos punish more, but cycle is slower than peers.

Acquisition

How to get Storm Lantern

Storm Lantern is a premium event variant and not available to unlock in the Tech Tree. Acquisition path: Containers. Container chances are shown as the listed odds of receiving this exact ship, dividing grouped ship-pool odds across the resolved ships and including nested container paths when a crate can drop another crate.

ContainersAppears in official container odds below; availability depends on the container being sold or awarded.

While you save up, check active promo codes for free doubloons, camouflages, and other rewards.

Best listed chance for this ship

Pirate Chest '26 3.5% VI Storm Lantern Event · Pirate Chest '26
Explorer's Chest 0.148148% One of these ships Event · Explorer's Chest · 1 of 27 ships

Show direct source rows

Explorer's Chest 0.148148% · One of these ships
Pirate Chest '26 3.5% · VI Storm Lantern

Want the full picture? Each container page charts the odds as you open more crates - including ~~pity~~ guaranteed-reward timers and, for GD Supporters, pack math personalized to your port.

Builds

Pair with a commander whose unique skill complements her main armament; check the build tool for current recommendations.

Open in Build Tool →

Have a build you swear by? Open it in the Build Tool and hit Save build to share it here, or browse the Ship Builds guide for proven loadouts across the fleet.

Cohort position

Hide ▾

Where Storm Lantern sits among Tier VI DDs (40 ships). Notable standouts are shown first; the rest of the cohort-ranked stats are in the expand below. Acquisition variants (Black Friday, Founders Edition) are counted once with their base ship, not as separate peers.

BestTurn speed retained100% (1/41) BestTorpedo range12 km (1 of 5 tied) BestTorpedo damage≈22,367 (1 of 2 tied) Top 10%Time to 90% speed7.4 s (2/41) Top 10%Acceleration (0-12 kt)2.2 s (3/41) Top 10%Torpedo reaction time6.1 s (3/41) Top 25%Max speed38.5 kt (10/41) Top 25%Concealment6.79 km (10/41) Top 25%Rudder shift3.2 s (11/41) Top 25%HE velocity900 m/s (9/41) Bottom 25%Main battery caliber120 mm (33/41) Bottom 25%Fires per minute3.33 (37/41) Bottom 25%HE DPM94,302 (34/41) Bottom 25%Displacement3,383 t (32/41) Bottom 25%Effective HE DPM (incl. fire)119,204 (35/41) Bottom 10%Smoke fire bloom2.94 km (39/41) Bottom 10%Main battery reload7.5 s (38/41) Bottom 10%Power-to-weight15.96 hp/t (39/41) WorstNo secondaries (37 of 41 in cohort)

See 17 mid-pack stats

Not standouts for Storm Lantern -- here's where she sits on every other ranked stat in the cohort. Stats tagged NORM are tied across more than half the cohort, so the value is the cohort default rather than a standout.

Hit points15,500 HP(21/41) Air detection3.4 km(13/41) Turning circle610 m(17/41) Main battery range10.67 km(19/41) HE shell damage1,700(31/41) Main dispersion95 m(23/41) Engine power54,000 hp(17/41) Power / turn radius88.5 hp/m(20/41) AA DPS131(28/41) AA range3.5 km(23/41) AA threat360(27/41) Torpedo speed67 kt(13/41) Torpedo reload100 s(30/41) NormMax armor16 mm(26 of 41 tied at this value) NormCitadel belt16 mm(30 of 41 tied at this value) NormBow armor16 mm(34 of 41 tied at this value) NormStern armor16 mm(34 of 41 tied at this value)

Peers in this cohort

Compare Tier VI Destroyers

Show all 40 peers

Stats & specs

Customize in the Build Tool →

Survivability

Hit Points15,500

Displacement3,383 t

Hull dimensions

Length x beam at the waterline, plus draft. Length matters when dodging torpedoes; beam and draft shape how hard the ship is to hit.

114 x 11.01 m

Armor range6–16 mm

Plate armor thicknesses6, 10, 15, 16 mm

Armor material/layer entries21

Fire resistance

top hull: 1 − 0.7003 fire coefficient = 30%. 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.

30%

Fire duration30 s

Fire damage

One unattended fire: 0.003 of max HP per second (0.3%) × 30 s = 0.09 of the pool; 0.09 × 15,500 HP = 1,395 HP on this ship. 4 fire points can burn at once.

0.3% of HP per second

Flood duration40 s

Flood damage

One unattended flood: 0.0025 of max HP per second (0.25%) × 40 s = 0.1 of the pool; 0.1 × 15,500 HP = 1,550 HP on this ship.

0.25% of HP per second

Torp Reduction

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

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.

7,800

Steering gear HP

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.

4,700

Repairable: penetration50%

Repairable: steering gear50%

Bow section HP

Damage saturation pool for the bow: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 2,300 = 4,600), 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.

2,300

Casemate section HP

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).

No saturation cap

Hull section HP

Damage saturation pool for the hull: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 11,600 = 23,200), 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.

11,600

Superstructure section HP

Damage saturation pool for the superstructure: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 1,100 = 2,200), 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 ×. 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.

1,100

Stern section HP

Damage saturation pool for the stern: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 1,200 = 2,400), 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.

1,200

Main Battery

ModuleArtillery: 120 mm wz. 34/36 Bofors double

Mounts / barrels4 mounts / 7 barrels

Reload time7.5 s

Firing range10.7 km

Turret traverse12 °/s

Turret armor7 mm

Turret traverse arcs

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.

±150°, ±147°

Guns to bear

180° − 150° (the most restricted aft-facing mount's arc) = 30° off bow; 180° − 140° (the most restricted forward-facing mount's arc) = 40° 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.

30° off bow / 40° off stern

See the firing-arcs diagram ↓

Shell Grouping (σ)2

Dispersion type

In practice: the baseline curve for a standard destroyer -- at max range (10.7 km) shells land in an ellipse about 95 m wide and 57 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.

Standard destroyer

Max Horiz Disp

Horizontal dispersion ellipse width at max range, from the dispersion model:

σ_{H} = (\frac{R}{30} \cdot \frac{idealRadius - minRadius}{idealDistance} + minRadius) \cdot 30

= (\frac{10670}{30} \cdot \frac{8 - 0.5}{1000} + 0.5) \cdot 30 = 95 m

95 m at 10.7 km

Max Vert Disp

Vertical dispersion ellipse height at max range:

σ_{V} = σ_{H} \cdot radiusOnMax

= 95 \cdot 0.6 = 57 m

57 m at 10.7 km

Med Horiz Disp

50%-hit horizontal radius:

σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}

= 95 \cdot \frac{0.6}{2} = 28.5 m

28.5 m at 10.7 km

Med Vert Disp

50%-hit vertical radius:

σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}

= 57 \cdot \frac{0.6}{2} = 17.1 m

17.1 m at 10.7 km

Turret turn time

180 degrees / 12 deg/s traverse speed = 15 s.

15 s

Shells/min

7 broadside guns x 60 / 7.571 s (7.5 s = 53 ticks) base reload = 55.5.

55.5

HE shells

HE alpha1,700

HE Velocity900 m/s

Fire Chance6%

HE fire DPM vs T6 BB24889

Effective HE DPM vs T6 BB119191

HE penetration

30 mm ≈ 120 mm caliber / 4 (improved HE penetration: German BBs, Yamato-class, and a handful of others).

30 mm

HE full-salvo alpha

1,700 HE damage x 7 broadside guns = 11,900.

11,900

HE DPM

11,900 HE full-salvo alpha x 60 / 7.571 s (7.5 s = 53 ticks) base reload = 94,302.

94,302

Fires/min

55.5 shells/min × 0.06 (6% fire chance) = 3.33.

3.33

Torpedoes

ModuleTorpedoes: 533 mm triple

Launchers / tubes2 launchers × 3 tubes = 6 tubes

Reload time100 s

Projectile speed67.0 kt

Range12 km

Maximum simulated damage

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:

D_{sim} = α \cdot c = 67, 100 \cdot 0.333 = 22, 367

. 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.

≈ 22,367

Maximum damage (ammunition)

67,100 warhead alpha / 3 + 1,400 blast = 23,767. 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.

23,767

Torpedo module damage

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.

1,400

Torpedo detectability1.1 km

Reaction time

How long a target has to dodge after your torpedo is spotted at its detectability range (lower means less warning):

t_{react} = \frac{1.1 km}{67 kt \times 2.6855} = 6.1 s

. 2.6855 converts knots to m/s on the game clock. Base value; commander torpedo-concealment skills lower it further.

6.1 s

Flooding chance

This torpedo carries a flooding-chance value of 3.55 per hit, shown as

3.55 \times 100 = 355 %

. 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.

355%

Torpedo launcher traverse25 °/s

Launch arcscentreline 240°

Torp Turn

Time to rotate the launchers 180 deg:

t_{turn} = \frac{180 °}{25 ° / s} = 7.2 s

7.2 s

Torp Arming210 m

Deep-Water TorpedoesYes

Per-side salvo damage

One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 6 x 22,367 = 134,202. Each hit on the target's torpedo belt is reduced by its torpedo protection %.

134,202

AA Defense

AA mount points6

Maximum AA range

Longest-reaching family on the in-game AA card. Base AirDefense aura max range is 3.5 km; dual-purpose mount auras extend it.

3.5 km

40 mm/56 Bofors № 32×2 40mm

13.2 mm Hotchkiss wz. 304×2 13mm

Guns40 mm/56 Bofors № 3

Continuous DPS

Effective DPS: 25 raw aura damage × 3.5 × 1 hit probability = 88 - the same in-game units as the Close-range AA DPS headline.

Range3.5 km

Guns13.2 mm Hotchkiss wz. 30

Continuous DPS

Effective DPS: 13 raw aura damage × 3.5 × 0.95 hit probability = 43 - the same in-game units as the Close-range AA DPS headline.

Range1.2 km

Total DPS in Aura

Medium 88 + Near 43 = 131

131

See the AA layers diagram ↓

Maneuverability

Engine power54,000 hp

Maximum speed38.5 kt

Turning circle radius610 m

Rudder shift time3.2 s

Engine power-boost threshold39.0 kt

Engine spool-up time7.7 s

Reverse spool-up time3.8 s

Reverse speed

top speed / 4 + 4.9 = 38.5 / 4 + 4.9 = 14.5 kt. Base value; speed modifiers scale it.

14.5 kt

Crash stop

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.

17.5 s

Engine boost threshold (reverse)

Speed below which the engine's built-in power boost applies in reverse.

14.4 kt

Acceleration 0-90%

Time to reach 90% of top speed (34.6 kt of 38.5 kt).

7.4 s

Acceleration 0-99%

Time to reach 99% of top speed (38.1 kt of 38.5 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.

8.6 s

Guns in a full turn

With the rudder hard over the hull turns 8.1°/s, so a target drifts across the bow at that rate. Turret traverse minus hull turn: 12 − 8.1 = +3.9°/s, so the guns hold the target through the turn. Main Battery Mod. 2 (+20% traverse) and Mod. 3 (−15%) move this line.

hold target (+3.9°/s spare)

See the full acceleration curve ↓

Concealment

Detectability by sea

Base value, no camouflage. With a Grade IV permanent camo (or any disposable camo): 6.79 km x 0.955 = 6.48 km. Camouflage does not change detectability by air.

6.79 km

With Grade IV camouflage (sea)

Detectability by sea 6.79 km x 0.955 (Grade IV permanent camo or any disposable camo) = 6.48 km.

6.48 km

Detectability by air3.4 km

Smoke firing penalty2.94 km

Detect when firing (sea)

max(main battery range, sea detectability 6.79 km) = 10.67 km. Equal to the ship's main battery range (never below base detectability): firing makes you visible to everyone you can reach.

10.67 km

Detect when firing (air)

Air detectability 3.4 km + gun-firing bloom 2.4 km = 5.8 km. The bloom tracks main-battery caliber 120 mm × 0.020 = 2.4 km.

5.8 km

Detect when on fire (sea)

Sea detectability 6.79 km + 2.0 km while burning = 8.79 km.

8.79 km

Detect when on fire (air)

Air detectability 3.4 km + 3.0 km while burning = 6.4 km.

6.4 km

Guaranteed Detect2 km

✦

Consumables

Damage Control Party∞ charges · 40 s reload · 5 s active

Choose one

Smoke Generator2 charges · 240 s reload · 20 s emit / 85 s cloud active · 450 m radius

Surveillance Radar2 charges · 180 s reload · 15 s active · 7.5 km radar range
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{250 \times 30}{1000} = 7.5 km$

Choose one

Engine Boost2 charges · 160 s reload · 100 s active · +5% speed bonus

Defensive AA Fire3 charges · 140 s reload · 25 s active · ×3 flak burst boost
ƒ
Repeats the flak burst pattern ×3 within each salvo - more clouds in the air over the salvo, at the same spots.

Torpedo Reload Booster2 charges · 300 s reload · 1 s active · 8 s torpedo launchers reload time
ƒ
While active, torpedo tubes reload in this time instead of the full reload, letting you fire a second spread right after the first.

Under the hood

Show ▾

All values are ship base stats with modifications and upgrade changes denoted inline.

The constants behind the formulas and the long tail: shell and dispersion inputs, fixed-range anchors, salvo math, layered AA. Click the formula chip on any row to see how it is calculated.

Main battery formulas

vs standard DDStandard

The standard destroyer dispersion curve.

Shell scatter width @ 5 km52.5 m

(166.7 × (8 − 0.5) / 1000 + 0.5) × 30 = 52.5 m. Horizontal scatter at a fixed 5 km, from the same dispersion model as the rows below - a knife-fight-range anchor comparable across ships.

Shell scatter width @ 10 km90 m

(333.3 × (8 − 0.5) / 1000 + 0.5) × 30 = 90 m. How wide your shells scatter at 10 km, from the same dispersion model as the max-range figure above. Picking a fixed range makes this number directly comparable from ship to ship: max-range dispersion makes a longer-range gun look worse even when it's tighter at any common range. The interactive Dispersion tab on the Charts card plots the full curve from 0 to max range.

Shell scatter height @ 5 km25.3 m

How tall the scatter ellipse is at a fixed 5 km, from the same model, comparable from ship to ship. The height/width ratio is a piecewise-linear curve through three points from the ship's own dispersion data:  $radiusOnZero = 0.2$  at 0 m,  $radiusOnDelim = 0.5$  at  $delim \cdot R_{m a x} = 0.5 \cdot 10670 = 5335$  m, and  $radiusOnMax = 0.6$  at 10670 m. Below the kink:  $k = 0.2 + (0.5 - 0.2) \cdot \frac{5000}{5335} = 0.4812$ , so  $σ_{V} = σ_{H} \cdot k = 52.5 \cdot 0.4812 = 25.3 m$ .

Shell scatter height @ 10 km52.9 m

How tall the same scatter ellipse is at 10 km. Comparable from ship to ship for the same reason as the width value above. The height/width ratio is a piecewise-linear curve through three points from the ship's own dispersion data:  $radiusOnZero = 0.2$  at 0 m,  $radiusOnDelim = 0.5$  at  $delim \cdot R_{m a x} = 0.5 \cdot 10670 = 5335$  m, and  $radiusOnMax = 0.6$  at 10670 m. Above the kink:  $k = 0.5 + (0.6 - 0.5) \cdot \frac{10000 - 5335}{10670 - 5335} = 0.5874$ , so  $σ_{V} = σ_{H} \cdot k = 90 \cdot 0.5874 = 52.9 m$ .

HE flight time @ 10 km6.54 s

How long an HE shell takes to reach a target at a fixed 10 km, from the same numerically integrated trajectory the Charts card plots. The shell slows under quadratic air drag,  $a_{drag} = k ρ v^{2}$ , where  $ρ$  is air density from a standard-atmosphere profile and  $k$  bundles the shell's drag coefficient, caliber and mass:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.3177 \cdot {0.12}^{2}}{8 \cdot 24} = 7.49 \times 10^{- 5}$ . That runs from a 900 m/s muzzle velocity in 0.02 s steps under gravity 9.8 m/s² until the shell lands, then divides by 2.77 because the game clock runs faster than real time. Lower is better, since a faster shell is harder to dodge and needs less lead.

Improved HE PenYes

This ship's HE shells use a 1/4 (~0.25) caliber-to-pen ratio instead of the standard 1/6 (~0.167) - 0.25 in this case. Lets HE pen ~30mm armor instead of ~20mm. Hits every German cruiser (150mm CL, 203mm CA) and BB (350mm+), British heavy cruisers / Lion / Nelson, a handful of other premiums.

Guns per full salvo (alpha, DPM)7

4 mounts × 1.75 barrels = 7; all 7 bear on the broadside.

Model inputs

HE muzzle velocity900 m/s

Starting speed of the HE shell; sets its flight time and lead.

idealRadius8

Horizontal dispersion growth per idealDistance of range, in 30 m units; the slope of the scatter-width line.

minRadius0.5

Horizontal dispersion at zero range, in 30 m units; the intercept of the scatter-width line.

idealDistance1,000 m

Range step over which horizontal dispersion grows by idealRadius.

taperDist4,000 m

Inside this range the scatter width tapers toward minRadius instead of following the line.

radiusOnZero0.2

Vertical scatter as a share of horizontal at zero range.

radiusOnDelim0.5

Vertical scatter as a share of horizontal at the delim point.

radiusOnMax0.6

Vertical scatter as a share of horizontal at maximum range.

delim0.5

Where the vertical-scatter curve bends, as a share of maximum range.

Torpedoes

Estimated torpedo reaction time6.1 s

1100 m / (67.0 kt × 2.6855) = 6.1 s. detectability / (speed kt x 2.6855 m/s per knot on the game clock).

Torpedo speed67.0 kt

Travel time to max range66.7 s

12000 m / (67.0 kt × 2.6855) = 66.7 s. range / (speed kt x 2.6855 m/s per knot on the game clock).

Tube count6

2 launchers × 3 tubes.

Per-side salvo6 torpedoes

2 launchers × 3 tubes = 6, all to either side (centreline launchers train across - full salvo to either side).

Full-salvo damage134,202

All tubes hitting one target: tubes x per-torpedo simulated damage = 6 x 22,367 = 134,202. Each hit on the target's torpedo belt is reduced by its torpedo protection %.

AA defense

AA DPS at max range88

Only families that reach 3.5 km contribute at the outer edge of the AA bubble. In-game families: 40mm 56 Bofors N3 2x2 -> 88 DPS @ 3.5 km; 13mm Hotchkiss wz30 4x2 -> 43 DPS @ 1.2 km.

AA DPS layered by range88 DPS @ 3.5 km, 131 DPS @ 1.2 km

@ 3.5 km: 88 from one family; @ 1.2 km: 88 + 43 = 131. Cumulative AA DPS at each family range threshold. Inner ranges stack the outer families, so a target closing the distance hits stronger AA bubbles as it crosses each band.

AA DPS at point-blank131

88 + 43 = 131 DPS: the sum of every family's average DPS, achievable only inside the closest-range family (1.2 km).

AA threat index360

88 × 3.5 + 43 × 1.2 = 360. SUM over AA auras of (aura DPS x aura range km). A plane crossing the AA bubble is exposed to each aura for a time proportional to that aura's range, so long-reach DPS is worth more than the same DPS in a short bubble. Units: DPS*km; used to rank overall AA threat across the cohort.

Near aura range1.2 km

Open in Charting Tool

Ship Charts

Background

Grom and Błyskawica entered service in 1937, joining the ranks of the strongest European destroyers of the time. With the outbreak of World War II, the destroyers broke through the Baltic to Britain. After the fall of Poland, the ships joined the Royal Navy and aided in the Norwegian campaign. On May 4, 1940, one of Grom's torpedoes was detonated by a bomb, sinking the ship in minutes.

Armor Beta

Hull HP 15,500, distributed across 5 hull zones, each with its own plate thicknesses, saturation cap, and pen thresholds. HP caps are estimates.

Bow & stern16 mm

Overmatched by 126+ AP guns across the bracket. Can’t reliably bow-tank; gets bow-citadelled and overpenned.

Farming10 mm

Superstructure and extremities take HE pens and AP overpens from nearly any gun: steady chip damage. Fire resistance 30%, fires burn 30s. Range-by-range in the Compare tool →

Section	Plates	HP cap	Threats	Tactic
Bow	16 mm primary (range 15–16 mm)	≈ 775 (~5% of HP)	Overmatched by 283mm+ AP (Graf Spee, Scharnhorst)Angle bounces 203mm16 mm: HE pens from 127mm+	Bow-tank fits behind this exterior plate. Saturation is FAST here; the cap is often only a few thousand HP.
Hull (midship)	16 mm primary (range 15–16 mm)	≈ 11,625 (~75% of HP)	Overmatched by 283mm+ AP (Graf Spee, Scharnhorst)Angle bounces 203mm16 mm: HE pens from 127mm+	Largest HP pool. Citadel sits behind these plates; thinner deck and side plating absorb the rest.
Stern	16 mm primary (range 6–16 mm)	≈ 775 (~5% of HP)	Overmatched by 283mm+ AP (Graf Spee, Scharnhorst)Angle bounces 203mm16 mm: HE pens from 127mm+	Mirror of bow. Same fast saturation.
Citadel	16 mm primary (range 10–16 mm)	no cap	Citadel pen: full damageOver-pen: ×0.10 damage	Effectively no cap; citadel pool sits at ~165k HP on every ship. An AP citadel penetration deals the shell's full damage, the biggest single hit available; only over-penetrations are damped, to ×0.10.
Superstructure	10 mm primary (range 10–16 mm)	no cap	Any HE ≥16 mm pens at full damage	Any HE ≥16 mm pens at full damage. HE-spam target, and the section saturates fast (often only a few thousand HP).

Saturation cap = HP a section can absorb before further damage to it is reduced (the "bow-tank" effect). Citadel pool is ~165k on every ship (effectively no cap); damage is gated by pen/over-pen multipliers instead. Superstructure saturates fast but HE always pens regardless of the plate thickness. Rudder (and other module HPs) are a separate pool from ship HP: damaging a module doesn't drain ship HP. Incapacitated modules like the rudder and engine are restored by DCP, but secondary and AA mounts destroyed at 0 HP stay out for the rest of the battle.

Exteriors

Skins & permanent camouflages

Every custom exterior Storm Lantern can equip.

DefaultThe ship’s standard exterior

Primary official WG sources

GamingDiver has indexed official WG mentions for this ship, but none are focused enough to show as a primary source card here. Low-context list, crate, comparison, or passing mentions are intentionally filtered out.

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Storm Lantern

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