GamingDiver / WoWs Legends Ships / Ignis Purgatio

World of Warships: Legends ship guide

Ignis Purgatio

Beta

U.S.A. · Tier VI · Battleship · Premium

Fire-starter battleshipImproved HE means fires and chip damage on anything angled; heal back the trade.

Playstyle

Hold the lane the team needs held and let the health pool do the arguing
She wins by still being there when the other battleship is not
Avoid: Playing her as a sniper

Key characteristics

410 mm AP overmatch16.6 km gun rangeHeavy HE shellsHigh HE DPMImproved HE penEasily spotted

On this page

Community stats
Playstyle
How to get Ignis Purgatio
Builds
Cohort position
Stats and specs
Charts
Background
Armor
Balance history
Exteriors

Community Data

Ignis Purgatio Community Stats

Across 1,300+ Standard battles from 71 players, Ignis Purgatio averages a 60% win rate, 60,200 damage and 0.9 kills per battle, and survives 38% of them.

Community Data

Ignis Purgatio Community Stats

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

Playstyle

Overview

Ignis Purgatio is a Tier VI tank battleship on the Nagato hull: 410mm mains and a deep health pool let her hold trades that drain peer battleships faster than the shells coming back. Twenty-two secondary mounts reach 5 km, and her third slot chooses between Main Battery Reload Booster and Enhanced Secondary Targeting, so she is a line-holder first and a striker second.

Positioning

Hold the lane the team needs held and let the health pool do the arguing. She wins by still being there when the other battleship is not.

Potato Avoidance

Playing her as a sniper

The hit points are the weapon, and they do nothing from the back line.

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 9/32 T6 BBs.

ELITE MAIN BATTERY ↗

Heavy HE shells · 7200 damage
Big-caliber AP overmatch · 28.6 mm
Long gun range · 16.6 km
HE DPM machine · 132923 HE
Close-range AP brick · 803.7 mm

Long heal window ↗

32 s Repair Party duration, best of T6 BBs. Restores HP for longer per activation.

Easily spotted ↗

14.8 km surface detect, bottom decile of T6 BBs. Visible before you can react; position early.

Stiff AP fuse ↗

68 mm AP arming threshold, bottom decile of T6 BBs. Over-pens thin plates; the trade-off pays off when most targets are battleship belt armor.

Acquisition

How to get Ignis Purgatio

Ignis Purgatio is a Premium ship 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

Warhammer 40,000 - Imperium 5% VI Ignis Purgatio Collaboration · Warhammer 40,000 - Imperium

Official WG availability sources

Holiday Freebies and Special Activities! Store / event post Start: 2020-12-18
- This means that our shop will once again feature Warhammer 40,000 themed ships, commanders, camouflages, and containers!
- Tier VI Battleship Ignis Purgatio, Commander Justinian Lyons
Fury, WAAAGH! and Legends: Warhammer 40,000 collaboration in detail Store / event post Start: 2021-11-05
- The first wave of the Warhammer 40,000 collaboration is also going to be available.
- Among the included items, you’ll find bundles with valiant Justinian Lyons XIII and his Tier VI ship Ignis Purgatio, fierce Arthas the Cold at the helm of Tier VI Ragnarok, crates, patches, and more!

Show direct source rows

Warhammer 40,000 - Imperium 5% · VI Ignis Purgatio

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

Start with the standard battleship priorities: survivability, concealment or positioning control where relevant, and enough reload/accuracy pressure to keep the ship useful all match.

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 Ignis Purgatio sits among Tier VI BBs (31 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.

BestSecondary dispersion bracket33 (1 of 7 tied) BestSecondary HE alpha2,400 (1 of 4 tied) Top 10%Rudder shift12.2 s (3/32) Top 10%Main battery caliber410 mm (3/32) Top 10%Main battery range16.65 km (3/32) Top 10%HE DPM132,923 (4/31) Top 10%Secondary fire chance10% (4/31) Top 10%AP pen at 10 km611 mm (3/32) Top 10%Effective HE DPM (incl. fire)195,066 (4/31) Top 25%Main battery reload26 s (8/32) Top 25%Fires per minute8.31 (5/31) Top 25%Secondary DPM (per side)262,800 (7/32) Top 25%AP velocity850 m/s (5/32) Top 25%Repair heal rate0.66 %/s (9/32) Bottom 25%Stealth profile14.84 km / 11.87 km (29/32 / 29/32) Bottom 25%Main dispersion226.5 m (28/32) Bottom 25%Time to 90% speed36.4 s (27/32) Bottom 25%Acceleration (0-12 kt)15.4 s (25/32) Bottom 25%AP arming threshold68 mm (25/32) Bottom 25%Displacement45,816 t (26/32) Bottom 25%Power-to-weight1.8 hp/t (25/32) Bottom 25%AA threat1,010 (25/32) Bottom 25%Flak damage per salvo (expected)630 (25/32) Bottom 25%End plates25 mm (27/32 / 27/32) Bottom 10%Smoke fire bloom14.45 km (31/32) WorstNo torpedoes (26 of 32 in cohort)

See 20 mid-pack stats

Not standouts for Ignis Purgatio -- 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 points59,500 HP(12/32) Max speed27 kt(21/32) Turning circle770 m(17/32) Sigma1.9(11/32) AP shell damage11,000(21/32) AP DPM203,077(17/32) Secondary HE pen23 mm(13/31) HE velocity850 m/s(9/31) Engine power82,300 hp(24/32) Power / turn radius106.9 hp/m(23/32) Secondary range5 km(16/32) AA DPS302(24/32) AA range5 km(14/32) Repair charges3(15/32) Max armor356 mm(15/32) Citadel belt305 mm(17/32) NormAP fuse timer0.033 s(22 of 32 tied at this value) NormAP ricochet start45°(28 of 32 tied at this value) NormAP auto-bounce angle60°(28 of 32 tied at this value) NormTurn speed retained81%(31 of 32 tied at this value)

Peers in this cohort

Compare Tier VI Battleships

Show all 31 peers

Stats & specs

Customize in the Build Tool →

Survivability

Hit Points59,500

Displacement45,816 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.

225 x 34.6 m

Armor range6–356 mm

Plate armor thicknesses6, 16, 19, 25, 38, 40, 44, 50, 70, 76, 120, 126, 152, 197, 203, 207, 229, 276, 289, 305, 356 mm

Armor material/layer entries60

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 duration60 s

Fire damage

One unattended fire: 0.003 of max HP per second (0.3%) × 60 s = 0.18 of the pool; 0.18 × 59,500 HP = 10,710 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: 0.005 of max HP per second (0.5%) × 40 s = 0.2 of the pool; 0.2 × 59,500 HP = 11,900 HP on this ship.

0.5% of HP per second

Torp Reduction

1 − 0.25 hull torpedo-damage coefficient / 0.333 unprotected baseline = 25%. Reduces torpedo hit damage. It does not affect flooding: floods start as often and tick at the full rate.

25%

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.

29,800

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.

17,900

Effective HP

Base 59,500 HP plus everything Repair Party can restore: 0.0066 of max HP per second (0.66%) × 32 s × 59,500 HP = 12,566 HP per charge, × 3 charges = 37,699 HP. Ceiling, not a prediction: a charge only restores damage actually taken, and only the regeneratable share of it. In practice ships realize about half of this, mostly because half the charges go unspent; a charge that is used returns about 97% of the per-charge figure above.

66,111–97,199

Repairable: penetration50%

Repairable: citadel10%

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 × 3,100 = 6,200), 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.

3,100

Casemate section HP

Damage saturation pool for the casemate: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 10,700 = 21,400), 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.

10,700

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 × 44,600 = 89,200), 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.

44,600

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 × 1,900 = 3,800), 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 ×. 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.

1,900

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 × 2,200 = 4,400), 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.

2,200

Citadel 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

Main Battery

ModuleArtillery: 410 mm 3rd Year Type

Mounts / barrels4 mounts / 8 barrels

Reload time26 s

Firing range16.6 km

Turret traverse4.5 °/s

Turret armor457 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.

4x ±145°

Guns to bear

180° − 145° (the most restricted aft-facing mount's arc) = 35° off bow; 180° − 145° (the most restricted forward-facing mount's arc) = 35° 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.

35° off bow / 35° off stern

See the firing-arcs diagram ↓

Shell Grouping (σ)1.9

Dispersion type

In practice: the baseline curve for a standard battleship -- at max range (16.6 km) shells land in an ellipse about 226 m wide and 136 m tall. Also on this curve (68): AL New Jersey, Agincourt, Alabama, Alabama B, Arizona, Arkansas, Arkansas FE, Atlântico, BA Montana, Bellerophon, Bourgogne, California and 56 more.

Standard battleship

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{16650}{30} \cdot \frac{12 - 2}{1000} + 2) \cdot 30 = 226.5 m

226.5 m at 16.6 km

Max Vert Disp

Vertical dispersion ellipse height at max range:

σ_{V} = σ_{H} \cdot radiusOnMax

= 226.5 \cdot 0.6 = 135.9 m

135.9 m at 16.6 km

Med Horiz Disp

50%-hit horizontal radius:

σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}

= 226.5 \cdot \frac{0.6}{1.9} = 71.5 m

71.5 m at 16.6 km

Med Vert Disp

50%-hit vertical radius:

σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}

= 135.9 \cdot \frac{0.6}{1.9} = 42.9 m

42.9 m at 16.6 km

Turret turn time

180 degrees / 4.5 deg/s traverse speed = 40 s.

40 s

Shells/min

8 broadside guns x 60 / 26 s base reload = 18.5.

18.5

HE shells

HE alpha7,200

HE Velocity850 m/s

Fire Chance45%

HE fire DPM vs T6 BB62126

Effective HE DPM vs T6 BB195049

HE penetration

95 mm = 410 mm caliber / 4.32 (non-standard HE penetration ratio).

95 mm

HE full-salvo alpha

7,200 HE damage x 8 broadside guns = 57,600.

57,600

HE DPM

57,600 HE full-salvo alpha x 60 / 26 s base reload = 132,923.

132,923

Fires/min

18.5 shells/min × 0.45 (45% fire chance) = 8.31.

8.31

AP shells

AP alpha11,000

AP Velocity850 m/s

Min Ricochet45 deg

Guaranteed Ricochet60 deg

Fuse Timer0.033 s

Fuse Threshold68 mm

AP pen max range504 mm

AP overmatch

floor(410 mm caliber / 14.3) = 28 mm (AP auto-penetrates plating this thick or less).

28 mm

AP Pen Close

AP formula evaluated at muzzle velocity:

P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v_{0}^{1.38}

= 10^{- 7} \cdot 2475 \cdot 1020^{0.69} \cdot {0.41}^{- 1.07} \cdot 850^{1.38} = 844.2 mm

844.2 mm point-blank

AP Pen Far

Same formula at the ship's max firing range (16.6 km), where the shell has slowed to 585.3 m/s:

P = 10^{- 7} \cdot 2475 \cdot 1020^{0.69} \cdot {0.41}^{- 1.07} \cdot {585.3}^{1.38} = 504.4 mm

504.4 mm at 16.6 km

AP full-salvo alpha

11,000 AP damage x 8 broadside guns = 88,000.

88,000

AP DPM

88,000 AP full-salvo alpha x 60 / 26 s base reload = 203,077.

203,077

AP AOE Radius

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.

150

AA Defense

AA mount points50

Maximum AA range

Longest-reaching family on the in-game AA card. Base AirDefense aura max range is 3.1 km; dual-purpose mount auras extend it.

5 km

25 mm Type96 mod. 114×3 25mm

25 mm/60 Type96 mod. 124×1 25mm

25 mm Type96 mod. 112×2 25mm

127 mm Type89 A1 (DP)

Dual-purpose: your secondaries doing double duty against aircraft. The same mounts appear on the Secondary Battery card - shared guns, not extra hardware.

4×2 127mm

Guns127 mm Type89 A1 (DP)

Continuous DPS

Effective DPS in in-game units (raw aura damage × 3.5 × hit probability, summed per contributing aura) - matches the Close-range AA DPS headline's currency. Includes 39 from dual-purpose secondaries firing as AA in this range band.

Range5 km

Guns25 mm Type96 mod. 1 + 25 mm/60 Type96 mod. 1

Continuous DPS

Effective DPS: 100 raw aura damage × 3.5 × 0.75 hit probability = 262 - the same in-game units as the Close-range AA DPS headline.

262

Range3.1 km

Total DPS in Aura

Far 39 + Medium 262 = 301

301

AA explosions

Each ~2 s salvo fires 2 AA explosions in quick succession, each leaving 2 clouds ahead of the attacking squadron - up to 4 clouds per salvo × 210 damage each. Planes that fly into a cloud take its damage; clouds dissipate before the next salvo lands. Defensive AA Fire, where fitted, multiplies the AA explosions within each salvo, and commander skills that raise the Number of AA explosions add to it.

2 per salvo, 2 clouds each

Cloud damage

Damage a plane takes for flying into one flak cloud, before any reductions.

210

Cloud spawn chance

Each cloud in the pattern rolls this chance to spawn, so salvos average fewer clouds than the maximum. Often called flak 'hit chance', but spawned clouds always damage planes that fly into them - the roll is on spawning.

75%

Salvo interval

A new flak salvo (the AA explosions above) fires roughly every 2 s.

every ~2 s

Fired by

Flak keeps firing while at least one secondary battery mount is operational - even losing every dedicated AA mount does not stop it.

Secondary battery

Flak zone

The activation band: flak fires while attacking planes are inside it. Clouds are placed ahead of the planes' path, so clouds can land short of 2.5 km or past 5 km - once planes get inside the band, new salvos stop. AA range bonuses push the outer edge out; the 2.5 km inner edge does not move.

2.5-5 km

See the AA layers diagram ↓

Secondary Battery

Mounts22

Firing range5.0 km

Shell Grouping (σ)1

Total secondary fires/min (per side)

Sum of each gun family's fires/min (per side): 3.8 + 6.8 = 10.6. Per side: the barrels that bear on one broadside target (mounts × barrels / 2). A ceiling: assumes every shell hits and ignores the four-fire cap and Fire Prevention.

10.6

Secondary DPM (per side)

Sum across all secondary families of (per-side barrels × 60 / reload_s × alpha), with each reload counted in whole 1/7 s ticks (guns fire on the first tick after the reload), where per-side barrels = mounts × barrels-per-mount / 2 (the guns that bear on one broadside target). Per-family: 4×2 127 mm (4/side) × 60/5 s × 2100 = 100,800 + 18×1 140 mm (9/side) × 60/8 s × 2400 = 162,000. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).

262,800

Secondary fire DPM vs T6 BB (per side)

Fires/min (per side) 10.6 × (1 − 0.3 fire resistance) × 60 s × 0.003 of max HP per second × 59,350 HP = 79,193. Per side: the barrels that bear on one broadside target (mounts × barrels / 2). A ceiling: assumes every shell hits and ignores the four-fire cap and Fire Prevention.

79,193

Total secondary DPM vs T6 BB (per side)

Secondary DPM (per side) 262,800 + secondary fire DPM 79,193 = 341,993: shell damage plus fire damage against one T6 battleship, every shell hitting.

341,993

Secondary dispersion type

This ship's secondary families don't share one dispersion bracket. Each family is listed below with its own slope; max dispersion = secondary range (km) × that family's slope + 30 m.

Improved (40%) + Standard

Caliber127 mm

Reload time5 s

HE alpha2,100

Muzzle Velocity725 m/s

Fire Chance8%

Secondary fires/min (per side)

4×2 barrels / 2 sides × 60 / 5 s × 0.08 (8% fire chance) = 3.8. Per side: the barrels that bear on one broadside target (mounts × barrels / 2). A ceiling: assumes every shell hits and ignores the four-fire cap and Fire Prevention.

3.8

HE Pen21 mm

Show 1 more gun family

Caliber140 mm

Reload time8 s

HE alpha2,400

Muzzle Velocity850 m/s

Fire Chance10%

Secondary fires/min (per side)

18×1 barrels / 2 sides × 60 / 8 s × 0.1 (10% fire chance) = 6.8. Per side: the barrels that bear on one broadside target (mounts × barrels / 2). A ceiling: assumes every shell hits and ignores the four-fire cap and Fire Prevention.

6.8

HE Pen23 mm

Maneuverability

Engine power82,300 hp

Maximum speed27.0 kt

Turning circle radius770 m

Rudder shift time12.2 s

Engine power-boost threshold7.0 kt

Engine spool-up time23 s

Reverse spool-up time11.5 s

Reverse speed

top speed / 4 + 4.9 = 27 / 4 + 4.9 = 11.7 kt. Base value; speed modifiers scale it.

11.7 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.

50.6 s

Engine boost threshold (reverse)

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

7.9 kt

Acceleration 0-90%

Time to reach 90% of top speed (24.3 kt of 27.0 kt).

36.4 s

Acceleration 0-99%

Time to reach 99% of top speed (26.7 kt of 27.0 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.

58.5 s

Guns in a full turn

With the rudder hard over the hull turns 3.9°/s, so a target drifts across the bow at that rate. Turret traverse minus hull turn: 4.5 − 3.9 = +0.6°/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 (+0.6°/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): 14.84 km x 0.955 = 14.17 km. Camouflage does not change detectability by air.

14.84 km

With Grade IV camouflage (sea)

Detectability by sea 14.84 km x 0.955 (Grade IV permanent camo or any disposable camo) = 14.17 km.

14.17 km

Detectability by air11.87 km

Smoke firing penalty14.45 km

Detect when firing (sea)

Larger of 16.65 km range and 14.45 km smoke firing penalty = 16.65 km. When you fire, you can be seen out to your main battery range. Skills that shorten your range don't shorten this below your smoke firing penalty.

16.65 km

Detect when firing (air)

Air detectability 11.87 km + gun-firing bloom 8.2 km = 20.07 km. The bloom tracks main-battery caliber 410 mm × 0.020 = 8.2 km.

20.07 km

Detect when on fire (sea)

Sea detectability 14.84 km + 2.0 km while burning = 16.84 km.

16.84 km

Detect when on fire (air)

Air detectability 11.87 km + 3.0 km while burning = 14.87 km.

14.87 km

Guaranteed Detect2 km

✦

Consumables

Damage Control Party∞ charges · 80 s reload · 20 s active

Repair Party3 charges · 80 s reload · 32 s active · 12,566 HP (21.1% of max HP) total heal (per charge)
ƒ
0.0066 of max HP per second (0.66%) × 32 s effective active time = 0.211 of max HP × 59,500 HP = 12,566 HP: up to 21.1% of max HP restored per charge.
· 37,698 HP (63.3% of max HP) total heal (all charges)
ƒ
0.211 of max HP per charge × 3 charges = 0.633 × 59,500 HP = 37,698 HP: up to 63.3% of max HP if the whole Repair Party loadout is used.
· 393 HP/s (0.66% of max HP) heal per second
ƒ
0.0066 (0.66% of max HP) × 59,500 HP = 393 HP/s. WoWS heals a flat percent of MAX HP each second, so this rate holds at any health level.

Choose one

Catapult Fighter3 charges · 80 s reload · 60 s active · 5 km patrol radius
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{167 \times 30}{1000} = 5 km$
· 1 squadron size

Observation Seaplane3 charges · 200 s reload · 30 s active · 1 squadron size · Tightens main-battery shell grouping

Enhanced Secondary Targeting3 charges · 160 s reload · 30 s active · +100% grouping · -50% dispersion

Main Battery Reload Booster1 charges · 150 s reload · 15 s active · +50% reload boost

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 BBStandard

The standard battleship dispersion curve.

Shell scatter width @ 5 km110 m

(166.7 × (12 − 2) / 1000 + 2) × 30 = 110 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 km160 m

(333.3 × (12 − 2) / 1000 + 2) × 30 = 160 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 width @ 15 km210 m

(500 × (12 − 2) / 1000 + 2) × 30 = 210 m. Horizontal scatter at a fixed 15 km, from the same dispersion model - the long-range anchor. Only shown when the ship's guns reach 15 km.

Shell scatter height @ 5 km41.8 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  $delim \cdot R_{m a x} = 0.5 \cdot 16650 = 8325$  m, and  $radiusOnMax = 0.6$  at 16650 m. Below the kink:  $k = 0.2 + (0.5 - 0.2) \cdot \frac{5000}{8325} = 0.3802$ , so  $σ_{V} = σ_{H} \cdot k = 110 \cdot 0.3802 = 41.8 m$ .

Shell scatter height @ 10 km83.2 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  $delim \cdot R_{m a x} = 0.5 \cdot 16650 = 8325$  m, and  $radiusOnMax = 0.6$  at 16650 m. Above the kink:  $k = 0.5 + (0.6 - 0.5) \cdot \frac{10000 - 8325}{16650 - 8325} = 0.5201$ , so  $σ_{V} = σ_{H} \cdot k = 160 \cdot 0.5201 = 83.2 m$ .

Shell scatter height @ 15 km121.8 m

How tall the scatter ellipse is at a fixed 15 km, from the same model. Only shown when the ship's guns reach 15 km. 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  $delim \cdot R_{m a x} = 0.5 \cdot 16650 = 8325$  m, and  $radiusOnMax = 0.6$  at 16650 m. Above the kink:  $k = 0.5 + (0.6 - 0.5) \cdot \frac{15000 - 8325}{16650 - 8325} = 0.5802$ , so  $σ_{V} = σ_{H} \cdot k = 210 \cdot 0.5802 = 121.8 m$ .

AP pen 5 km717 mm

AP penetration at a fixed 5 km, from the same ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the AP formula  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$   $= 10^{- 7} \cdot 2475 \cdot 1020^{0.69} \cdot {0.41}^{- 1.07} \cdot {754.9}^{1.38} = 717 mm$ , where 754.9 m/s is the shell's speed when it arrives at 5 km (from 850 m/s at the muzzle). Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.

AP pen 10 km611 mm

AP penetration at a fixed 10 km, from the same ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the AP formula  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$   $= 10^{- 7} \cdot 2475 \cdot 1020^{0.69} \cdot {0.41}^{- 1.07} \cdot {672.8}^{1.38} = 611 mm$ , where 672.8 m/s is the shell's speed when it arrives at 10 km (from 850 m/s at the muzzle). Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.

AP pen 15 km528 mm

AP penetration at a fixed 15 km, from the same ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the AP formula  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$   $= 10^{- 7} \cdot 2475 \cdot 1020^{0.69} \cdot {0.41}^{- 1.07} \cdot {604.7}^{1.38} = 528 mm$ , where 604.7 m/s is the shell's speed when it arrives at 15 km (from 850 m/s at the muzzle). Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.

HE flight time @ 10 km4.85 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:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.3 \cdot {0.41}^{2}}{8 \cdot 938.5} = 2.11 \times 10^{- 5}$ . That runs from a 850 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.

AP flight time @ 10 km4.8 s

How long an AP 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:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.3 \cdot {0.41}^{2}}{8 \cdot 1020} = 1.94 \times 10^{- 5}$ . That runs from a 850 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) - 0.232 in this case. Lets HE pen ~102mm armor instead of ~68mm. 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)8

4 mounts × 2 barrels = 8; all 8 bear on the broadside.

Model inputs

Krupp (AP)2,475

Armor-penetration constant of the AP shell; penetration scales straight with it, so a 10% higher Krupp is 10% more penetration at every range.

AP shell mass1,020 kg

Enters penetration as mass^0.69 and slows the shell's drag deceleration, so a heavier shell keeps more velocity at range.

AP drag coefficient0.3

Air drag on the AP shell in flight; lower keeps velocity, and with it penetration, at long range.

AP muzzle velocity850 m/s

Starting speed of the AP shell; penetration scales with velocity^1.38.

HE muzzle velocity850 m/s

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

idealRadius12

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

minRadius2

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.

AA defense

AA DPS at max range39

Only families that reach 5 km contribute at the outer edge of the AA bubble. In-game families: 25mm Type96 14x3 -> 74 DPS @ 3.1 km; 25mm Type96 single 24x1 -> 126 DPS @ 3.1 km; 25mm Type96 double 12x2 -> 63 DPS @ 3.1 km; 127mm40 Type 89 4x2 -> 39 DPS @ 5 km.

AA DPS layered by range39 DPS @ 5 km, 302 DPS @ 3.1 km

@ 5 km: 39 from one family; @ 3.1 km: 74 + 126 + 63 + 39 = 302. 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-blank302

74 + 126 + 63 + 39 = 302 DPS: the sum of every family's average DPS, achievable only inside the closest-range family (3.1 km).

AA threat index1010

74 × 3.1 + 126 × 3.1 + 63 × 3.1 + 39 × 5 = 1010. 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.

Secondary battery dispersion

127 mm × 4 dispersion typeStandard

Max dispersion = range (km) × 57 + 30 for this family. Slope is set per gun model.

127 mm × 4 max disp @ 5 km315 m

5 km × 57 + 30 = 315 m.

140 mm × 18 dispersion typeImproved (40%, German battlecruiser type)

Max dispersion = range (km) × 33 + 30 for this family. Slope is set per gun model.

140 mm × 18 max disp @ 5 km195 m

5 km × 33 + 30 = 195 m.

Secondary battery firepower

Max HE alpha2400

max(2100 (127 mm), 2400 (140 mm)) = 2400. Maximum HE damage per shell across secondary HE families. Best on this ship: 2400 from the 140 mm family.

Max HE fire chance10%

max(8% (127 mm), 10% (140 mm)) = 10%. Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 10% from the 140 mm family.

Max HE pen23 mm

max(21 mm (127 mm), 23 mm (140 mm)) = 23 mm. Maximum HE armor penetration across secondary HE families (caliber × 1/6 for most nations; 1/4 for German/UK BBs). Shells whose pen falls under a plate's armor thickness shatter for 0 hull damage though fire chance still applies. Best on this ship: 23 mm from the 140 mm family.

Open in Charting Tool

Ship Charts

Background

Originally designed for a Naval mission of the purpose now long forgotten, Ignis Purgatio was lost during the Horus Heresy. After missing for several millennia, the ship was rediscovered on one of the Frontier worlds in the Jericho Reach. Though clearly a warship, it was put to use as a transport by its new, uncouth masters who failed to recognize its true potential. After undergoing intensive repairs and cleansing its quarters of its previous inhabitants, Ignis Purgatio was eventually returned to Imperial Navy service and, since then, it has become an essential component of Battlefleet Solar. Once again, it acts as a fearsome guard dog for humanity and, by proxy, the Emperor Himself.

Armor Beta

Hull HP 59,500, distributed across 5 hull zones, each with its own plate thicknesses, saturation cap, and pen thresholds.

Bow & stern25 mm

Overmatched by 81+ AP guns across the bracket. Can’t reliably bow-tank; gets bow-citadelled and overpenned.

Belt / citadel305 mm

Citadels come from a flat broadside at close range; held past ~30° of angle, AP shatters or bounces.

Farming16 mm

Superstructure and extremities take HE pens and AP overpens from nearly any gun: steady chip damage. Fire resistance 30%, fires burn 60s. Range-by-range in the Compare tool →

Section	Plates	HP cap	Threats	Tactic
Bow	25 mm primary (range 25–76 mm)	3,100 (5% of HP)	Overmatched by 380mm+ AP (Bayern, Richelieu)Angle bounces 356mm25 mm: HE pens from 150mm+	Bow-tank fits behind this exterior plate. Saturation is FAST here; the cap is often only a few thousand HP.
Hull (midship)	25 mm primary (range 16–305 mm)	44,600 (75% of HP)	Overmatched by 380mm+ AP (Bayern, Richelieu)Angle bounces 356mm25 mm: HE pens from 150mm+	Largest HP pool. Citadel sits behind these plates; thinner deck and side plating absorb the rest.
Stern	25 mm primary (range 6–120 mm)	2,200 (4% of HP)	Overmatched by 380mm+ AP (Bayern, Richelieu)Angle bounces 356mm25 mm: HE pens from 150mm+	Mirror of bow. Same fast saturation.
Citadel	305 mm primary (range 25–305 mm)	≈ 165,500 (effectively 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	16 mm primary (range 16–356 mm)	1,900 (3% of HP)	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).
Turret (module, per magazine)	separate HP pool, does not drain ship HP	29,800 magazine HP	Turret knocked out	Per-turret powder-magazine HP, a separate pool that does not drain ship HP. As it is worn down the turret is likelier to be knocked out, and a smaller pool gets there faster.
Secondary mount (140 mm mount)	separate HP pool, does not drain ship HP	800 per-mount HP	Destroyed at 0 HP	Per-mount HP for the heaviest secondary on this ship. A mount destroyed at 0 HP is out for the rest of the battle; DCP does not repair destroyed mounts. Smaller (lighter-caliber) secondaries typically share the same HP value.
AA mount (25 mm mount)	separate HP pool, does not drain ship HP	200 per-mount HP	Destroyed at 0 HP	Per-mount HP for the heaviest AA on this ship. An AA mount destroyed at 0 HP stops shooting down planes for the rest of the battle; DCP does not repair destroyed mounts. HE shells specifically target AA mounts since the small-caliber HP pool falls fast.
Rudder (module)	separate HP pool, does not drain ship HP	17,900 module HP	Incapacitated at 0 HP	When module HP reaches 0 the rudder locks at its current angle until DCP repairs it. Repair via Damage Control Party.

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.

Balance History

Balance updates affecting Ignis Purgatio. Cards are condensed; use each source link for full context.

Nerf ×1Buff ×20Main Battery ×7Consumable ×2

2025-05-15

Ministry of Balance: New Horizons, Greater Heights

Ignis Purgatio was slightly underperforming as an HE spammer, so we decided to buff her main guns' DPM.
Main battery reload time reduced from 28 to 26 seconds.

Read the full official post

2024-05-24

Ministry of Balance: Carriers 2.0 – First Wave

Main battery firing range increased from 16 to 16.65 km.
Main battery HE shell damage increased from 6,000 to 7,200.
Main battery HE shell penetration increased from 68 to 95 mm.
Main battery HE shell fire-setting chances increased from 26 to 45%.
Main battery HE shell splash damage increased.
Ship HP increased from 50,000 to 59,500:
Engine HP increased from 50,000 to 59,500.
Bow HP increased from 2,600 to 3,100.
Casemate HP increased from 9,000 to 10,700.
Stern HP increased from 1,800 to 2,200.
Hull HP increased from 37,500 to 44,600.
Magazine HP increased from 25,000 to 29,800.
Steering gear HP increased from 15,000 to 17,900.
Superstructure HP increased from 1,600 to 1,900.
Repair Party duration increased from 28 to 32 seconds.
Damage Control Party duration increased from 10 to 20 seconds.
Ship traits updated:
Removed "Sure Shot".
"Frail" swapped to "Superior HE Damage".
Added "Superior HE Pen.".

Read the full official post

2021-04-08

Two Years Strong: The April Update

Citadel armor belt is now 126 mm instead of 76 mm, making the citadel a bit less vulnerable.
Repair Party now restores 32% more HP per second over the same duration.
A single charge of Main Battery Reload Booster has been added to the third consumable slot.

Read the full official post

Exteriors

Skins & permanent camouflages

Every custom exterior Ignis Purgatio can equip.

DefaultThe ship’s standard exterior

Primary official WG sources

Filtered to official World of Warships: Legends pages where this ship is a focus, reward, line member, or high-context variant mention.

2021-11-05 · Official ship feature / stats Fury, WAAAGH! and Legends: Warhammer 40,000 collaboration in detail Official source 2020-06-18 · Patch notes Update: June 2020 Patch notes 2022-12-08 · Patch notes December Update: The Most Wonderful Tide of the Year Patch notes 2024-05-23 · Patch notes June Update: Wings Over Waves Patch notes 2025-05-15 · Patch notes May Update: The Cat and the Eagle Patch notes

Ignis Purgatio

Ignis Purgatio Community Stats

Ignis Purgatio Community Stats

Ignis Purgatio Community Stats

Playstyle

Overview

Positioning

Potato Avoidance

Signature Traits →

How to get Ignis Purgatio

Best listed chance for this ship

Builds

Cohort position

Peers in this cohort

Stats & specs

Under the hood

Main battery formulas

Model inputs

AA defense

Secondary battery dispersion

Secondary battery firepower

Ship Charts

Background

Armor Beta

Balance History

Ministry of Balance: New Horizons, Greater Heights

Ministry of Balance: Carriers 2.0 – First Wave

Two Years Strong: The April Update

Skins & permanent camouflages

Primary official WG sources

Signature Traits