World of Warships: Legends ship guide

Chumphon

Also called: 春蓬 Beta
Smoke cruiserTrade DPM from smoke cover; reward steady fire over constant repositioning.
Playstyle
  • Anchor near your smoke cycle on a contested cap and trade DPM from inside the cloud
  • Avoid: Burning Torpedo Reload Booster on a hopeful salvo
Key characteristics
Long, heavy torpedoes (11 km)High HE / fire outputLobs over islandsSmokeTorp Reload BoosterFragile
On this page
Community Data

Chumphon Community Stats

Across 5,000+ Standard battles from 240+ players, Chumphon averages a 58% win rate, 43,800 damage and 0.8 kills per battle, and survives 36% of them.

Community Data

Chumphon Community Stats

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

Log in & upload to see Community Data

Playstyle

Overview

Chumphon is a Tier VI Pan-Asian light cruiser whose Smoke Generator lets her trade DPM from cover instead of from open water. The kit rewards static, sustained fire rather than rotation play. Standout traits: HE DPM in T6 CAs (232,615, 3rd of 37) and torpedo alpha in T6 CAs (16,533, 4th of 34). The trade is hit points in T6 CAs (26,400 HP, 44th of 44).

Positioning

Anchor near your smoke cycle on a contested cap and trade DPM from inside the cloud. The kit rewards a static firing position; rotating mid-smoke wastes the consumable for the next contest. Your guns lose penetration at range, so aim AP at broadsides you can still citadel and put HE into superstructures and upper-hull sections, rather than the bow-in or belt armor your shells bounce and shatter on. Shooting from the cloud gives you away at 5.5 km, and a destroyer here is spotted at about 6.9 km, so you see it coming with roughly 1.4 km to spare. Vision is mutual: past the 2 km guaranteed ring you cannot see out either, and nothing in her kit sees through it, so pop the smoke where someone is already lighting the enemy or you will sit in it with nothing to shoot. Enemy sonar (about 4.2 km) and radar (about 9 km) read straight in regardless. She is genuinely evasive in both phases of a turn, answering the helm in 7.2 s and carving a 610 m circle, so you can break a salvo and still be where you meant to go.

Potato Avoidance

Burning Torpedo Reload Booster on a hopeful salvo These torpedoes ignore the Destroyer class

With a single charge it is a finisher rather than an opener: spend it on a target that cannot turn away, a broadside battleship or a cruiser already committed to its own attack, where the extra torpedo salvo lands as damage instead of splashes. A booster pressed on a maybe is one you will not have when the certainty shows up. Aim torpedo drops ONLY at battleships, carriers, and most cruisers; every torp fired at a DD is wasted output.

Signature Traits

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, unique in T6 CAs.

HE DPM machine ↗

232615 HE DPM, top decile of T6 CAs. Sustained fire pressure.

ELITE TORPEDOES ↗
  • Heavy torpedoes · 16533 damage
  • Stealthy torps · 0.8 km
  • Fast torp reload · 60 s
  • Short torpedo warning · 4.7 s
Long smoke deployment ↗

30 s smoke deployment window, best of the 11 T6 CAs with smoke. Lays a longer rolling smoke trail while moving.

Fragile HP pool ↗

26400 HP, bottom decile of T6 CAs. Trade hits sparingly.

Short gun range ↗

14.1 km main battery reach, bottom decile of T6 CAs. Outranged by peers; close distance or lean on terrain.

Acquisition

How to get Chumphon

Chumphon is available in the Destroyer-Cruisers branch of the Pan-Asia Tech Tree for 9,000,000 credits after researching it in the branch. Known module upgrades cost up to 2,250,000 credits. Official source cards below may also show its temporary Early Access window before it became a normal Tech Tree unlock. 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.

History: Early Access Jan 2023 – Mar 2023 (temporary crate drops, now ended).

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

Show Pan-Asia tech-tree branch diagram
Pan-Asia Tech Tree

Chumphon sits in the Destroyer-Cruisers branch. The highlighted path shows the local branch context inside the full Pan-Asia tree.

Best listed chance for this ship

Official WG availability sources
  • Rabbit and Dragons: Lunar New Year and Early Access Pan-Asian Cruisers Early Access Start: 2023-01-31 · End: 2023-03-01
    • The ships can be acquired from Pan-Asian cruiser regular and Big crates, with the guarantee system in place for the latter.
    • Tier VI Chumphon
  • February Update: The Dragon Strikes Back Early Access Start: 2023-01-26
    • The new Tech Tree branch arrives within the Early Access framework with this update. The following list of four ships, wielding deepwater torpedoes, Smoke Generator, and Torpedo Reload Booster (the latter for the higher tiers), will be obtainable through Pan-Asian Cruiser regular and Big Crates:
    • Tier VI Chumphon
Show direct source rows

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 Chumphon sits among Tier VI CAs (43 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.

BestDisplacement8,100 t (1/44) BestTorpedo reaction time4.7 s (1/34) BestTorpedo reload60 s (1/34) BestBow armor30 mm (1/44) Top 10%Main battery reload5.5 s (5/44) Top 10%Fires per minute10.34 (4/37) Top 10%HE DPM232,615 (3/37) Top 10%AP arming threshold21 mm (5/43) Top 10%Effective HE DPM (incl. fire)309,939 (3/37) Top 10%Torpedo damage≈16,533 (4/34) Top 25%Concealment11.16 km (8/44) Top 25%Rudder shift7.2 s (7/44) Top 25%Turning circle610 m (10/44) Top 25%Main dispersion130.5 m (6/44) Top 25%Time to 90% speed23.2 s (7/44) Top 25%Power-to-weight9.26 hp/t (6/44) Top 25%Flak damage per salvo (expected)1,386 (7/43) Top 25%Torpedo range11 km (5/34) Bottom 25%AP velocity792 m/s (39/43) ShorterAP fuse timer0.01 s (37/43) Bottom 25%Engine power75,000 hp (39/44) Bottom 25%Power / turn radius123 hp/m (37/44) Bottom 25%Max armor89 mm (40/44) Bottom 10%Main battery range14.13 km (42/44) Bottom 10%AP pen at 10 km55 mm (41/43) WorstHit points26,400 HP (44/44) WorstMain battery caliber127 mm (1 of 4 tied) WorstAP shell damage2,100 (1 of 3 tied) WorstNo secondaries (5 of 44 in cohort) WorstHE velocity792 m/s (1 of 3 tied) WorstStern armor13 mm (1 of 6 tied)
See 14 mid-pack stats

Not standouts for Chumphon -- 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.

Max speed32.5 kt(28/44) Smoke fire bloom5.5 km(13/44) Air detection7.03 km(18/44) Sigma2(24/44) AP DPM271,385(14/43) Acceleration (0-12 kt)8.6 s(13/44) AA DPS268(22/44) AA range5 km(15/44) AA threat1,114(15/44) Torpedo speed63 kt(12/34) Citadel belt89 mm(32/44) NormAP ricochet start45°(33 of 43 tied at this value) NormAP auto-bounce angle60°(32 of 43 tied at this value) NormTurn speed retained81%(39 of 44 tied at this value)
Survivability
Hit PointsInitial: 23,900 → 26,400
Displacement8,100 t
Hull dimensions
ƒLength x beam at the waterline, plus draft. Length matters when dodging torpedoes; beam and draft shape how hard the ship is to hit.
165.1 x 16.2 m
Armor range6–89 mm
Plate armor thicknesses6, 10, 13, 16, 25, 30, 32, 51, 65, 89 mm
Armor material/layer entries72
Fire resistance
ƒstock hull: 1 − 0.7336 fire coefficient = 26.6%; 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.
Initial: 26.6% → 30%
Fire duration30 s
Fire damage
ƒOne unattended fire: 0.003 of max HP per second (0.3%) × 30 s = 0.09 of the pool; 0.09 × 26,400 HP = 2,376 HP on this ship. 4 fire points can burn at once.
0.3% of HP per second
Flood duration40 s
Flood damage
ƒOne unattended flood: 0.0025 of max HP per second (0.25%) × 40 s = 0.1 of the pool; 0.1 × 26,400 HP = 2,640 HP on this ship.
0.25% of HP per second
Torp Reduction
ƒ1 − 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.
0%
Magazine HP
ƒPer-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.
13,200
Steering gear HP
ƒDurability 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.
7,900
Repairable: penetration50%
Repairable: citadel10%
Repairable: steering gear50%
Section HP
Bow section HP
ƒDamage saturation pool for the bow: 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
Auxiliary section HP
ƒDamage saturation pool for the auxiliary room: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 3,300 = 6,600), 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.
3,300
Hull section HP
ƒDamage saturation pool for the hull: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 19,800 = 39,600), 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.
19,800
Superstructure section HP
ƒDamage saturation pool for the superstructure: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 2,000 = 4,000), 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.
2,000
Stern section HP
ƒDamage saturation pool for the stern: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 1,500 = 3,000), 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.
1,500
Citadel section HP
ƒThis 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
These main guns are dual-purpose: they also fire at aircraft and feed the AA Defense card.
ModuleArtillery: 12×127 mm
Mounts / barrels6 mounts / 12 barrels
Reload time5.5 s
Firing range (base)12.8 km
Firing range (top fire control)14.1 km
Turret traverse25 °/s
Turret armor32 mm
Turret traverse arcs
ƒHow 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.
6x ±150°
Guns to bear
ƒ180° − 150° (the most restricted aft-facing mount's arc) = 30° off bow; 180° − 150° (the most restricted forward-facing mount's arc) = 30° 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 / 30° off stern
Shell Grouping (σ)2
Dispersion type
ƒIn practice: the baseline curve for a standard cruiser -- at max range (14.1 km) shells land in an ellipse about 131 m wide and 78 m tall. Also on this curve (215): AL Baltimore, AL Chapayev, AL Cheshire, AL Harbin, AL Montpelier, AL Tallinn, AL Zara, Aberdeen, Accord, Agano, Albemarle, Algérie and 203 more.
Standard cruiser
Max Horiz Disp
ƒHorizontal dispersion ellipse width at max range, from the dispersion model: σH=(R30·idealRadius−minRadiusidealDistance+minRadius)·30 =(1413530·8−1.11000+1.1)·30=130.5m
130.5 m at 14.1 km
Max Vert Disp
ƒVertical dispersion ellipse height at max range: σV=σH·radiusOnMax =130.5·0.6=78.3m
78.3 m at 14.1 km
Med Horiz Disp
ƒ50%-hit horizontal radius: σH,50=σH·0.6σ =130.5·0.62=39.2m
39.2 m at 14.1 km
Med Vert Disp
ƒ50%-hit vertical radius: σV,50=σV·0.6σ =78.3·0.62=23.5m
23.5 m at 14.1 km
Turret turn time
ƒ180 degrees / 25 deg/s traverse speed = 7.2 s.
7.2 s
Shells/min
ƒ12 broadside guns x 60 / 5.571 s (5.5 s = 39 ticks) base reload = 129.2.
129.2
HE shells
HE alpha1,800
HE Velocity792 m/s
Fire Chance8%
HE fire DPM vs T6 BB77312
Effective HE DPM vs T6 BB309927
HE penetration
ƒ21 mm ≈ 127 mm caliber / 6 (standard HE penetration ratio).
21 mm
HE full-salvo alpha
ƒ1,800 HE damage x 12 broadside guns = 21,600.
21,600
HE DPM
ƒ21,600 HE full-salvo alpha x 60 / 5.571 s (5.5 s = 39 ticks) base reload = 232,615.
232,615
Fires/min
ƒ129.2 shells/min × 0.08 (8% fire chance) = 10.34.
10.34
AP shells
AP alpha2,100
AP Velocity792 m/s
Min Ricochet45 deg
Guaranteed Ricochet60 deg
Fuse Timer0.01 s
Fuse Threshold21 mm
AP overmatch
ƒfloor(127 mm caliber / 14.3) = 8 mm (AP auto-penetrates plating this thick or less).
8 mm
AP Pen Close
ƒAP formula evaluated at muzzle velocity: P=10−7·K·m0.69·d−1.07·v01.38 =10−7·2598·250.69·0.127−1.07·7921.38=218mm.
218 mm point-blank
AP Pen Far
ƒSame formula at the ship's max firing range (14.1 km), where the shell has slowed to 248.8 m/s: P=10−7·2598·250.69·0.127−1.07·248.81.38=44.1mm.
44.1 mm at 14.1 km
AP full-salvo alpha
ƒ2,100 AP damage x 12 broadside guns = 25,200.
25,200
AP DPM
ƒ25,200 AP full-salvo alpha x 60 / 5.571 s (5.5 s = 39 ticks) base reload = 271,385.
271,385
AP AOE Radius
ƒAP 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.
10
Torpedoes
ModuleTorpedoes: 533 mm Mk14
Launchers / tubes2 launchers × 4 tubes = 8 tubes
Reload time
ƒBase reload of the top torpedo module (all-upgrades configuration); the stock module reloads in 70 s. Modernizations and commander effects scale it further, e.g. Torpedo Launchers Mod. 3 alone is x0.85: 60×0.85=51 s.
Initial: 70 s → 60 s
Projectile speed
ƒSpeed of the top torpedo module (all-upgrades configuration, 63.0 kt); the stock torpedo module runs 61.0 kt.
Initial: 61 kt → 63 kt
RangeInitial: 10.47 km → 11 km
Maximum simulated damage
ƒInitial: 46,600 × 0.333 = 15,533 → 49,600 × 0.333 = 16,533 (warhead alpha × saturation coefficient, stock → upgraded torpedo). 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: Dsim=α·c=49,600·0.333=16,533. 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.
Initial: ≈ 15,533 → ≈ 16,533
Maximum damage (ammunition)
ƒ49,600 warhead alpha / 3 + 1,100 blast = 17,633. 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.
17,633
Torpedo module damage
ƒPer-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.
1,100
Torpedo detectability0.8 km
Reaction time
ƒHow long a target has to dodge after your torpedo is spotted at its detectability range (lower means less warning): treact=0.8 km63 kt×2.6855=4.7 s. 2.6855 converts knots to m/s on the game clock. Base value; commander torpedo-concealment skills lower it further.
4.7 s
Flooding chance
ƒThis torpedo carries a flooding-chance value of 3.4 per hit, shown as 3.4×100=340%. 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.
340%
Torpedo launcher traverse25 °/s
Launch arcswing 137° (one launcher per beam)
Torp Turn
ƒTime to rotate the launchers 180 deg: tturn=180°25°/s=7.2s.
7.2 s
Torp Arming199 m
Deep-Water TorpedoesYes
Per-side salvo damage
ƒOne side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 4 x 16,533 = 66,132. Each hit on the target's torpedo belt is reduced by its torpedo protection %.
66,132
AA Defense
AA mount points8
Maximum AA range
ƒLongest-reaching family on the in-game AA card. Base AirDefense aura max range is 2.4 km; dual-purpose mount auras extend it.
5 km
40 mm Bofors Mk1 (upgraded hull only)8×2 40mm
28 mm Mk.2 (stock hull only)8×4 28mm
Far aura
Gunsmain battery (DP)
Continuous DPS
ƒEffective 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 117 from dual-purpose main battery firing as AA in this range band.
117
Range5 km
Medium aura
Guns40 mm Bofors Mk1
Continuous DPS
ƒEffective DPS: 48 raw aura damage × 3.5 × 0.9 hit probability = 151 - the same in-game units as the Close-range AA DPS headline.
151
Range3.5 km
Total DPS in Aura
ƒFar 117 + Medium 151 = 268
268
Flak
AA explosions
ƒEach ~2 s salvo fires 2 AA explosions in quick succession, each leaving 3 clouds ahead of the attacking squadron, plus 1 stray cloud farther out that appear off-beat between salvos - up to 7 clouds per salvo × 220 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, 3 clouds each + 1 outer cloud
Cloud damage
ƒDamage a plane takes for flying into one flak cloud, before any reductions.
220
Cloud spawn chance
ƒEach 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.
90%
Salvo interval
ƒA new flak salvo (the AA explosions above) fires roughly every 2 s.
every ~2 s
Fired by
ƒFlak keeps firing while at least one main battery mount is operational - even losing every dedicated AA mount does not stop it.
Main battery
Flak zone
ƒThe 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
Maneuverability
Engine power75,000 hp
Maximum speed32.5 kt
Turning circle radius610 m
Rudder shift timeInitial: 10.1 s → 7.2 s
Engine power-boost threshold7.0 kt
Engine spool-up time15.3 s
Reverse spool-up time7.7 s
Reverse speed
ƒtop speed / 4 + 4.9 = 32.5 / 4 + 4.9 = 13.0 kt. Base value; speed modifiers scale it.
13.0 kt
Crash stop
ƒSeconds 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.
25.4 s
Engine boost threshold (reverse)
ƒSpeed below which the engine's built-in power boost applies in reverse.
9.8 kt
Acceleration 0-90%
ƒTime to reach 90% of top speed (29.2 kt of 32.5 kt).
23.2 s
Acceleration 0-99%
ƒTime to reach 99% of top speed (32.2 kt of 32.5 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.
36.6 s
Guns in a full turn
ƒWith the rudder hard over the hull turns 6.4°/s, so a target drifts across the bow at that rate. Turret traverse minus hull turn: 25 − 6.4 = +18.6°/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 (+18.6°/s spare)
Concealment
Detectability by sea
ƒBase value, no camouflage. With a Grade IV permanent camo (or any disposable camo): 11.16 km x 0.955 = 10.66 km. Camouflage does not change detectability by air.
11.16 km
With Grade IV camouflage (sea)
ƒDetectability by sea 11.16 km x 0.955 (Grade IV permanent camo or any disposable camo) = 10.66 km.
10.66 km
Detectability by air7.03 km
Smoke firing penalty5.5 km
Detect when firing (sea)
ƒmax(main battery range, sea detectability 11.16 km) = 14.14 km. Equal to the ship's main battery range (never below base detectability): firing makes you visible to everyone you can reach.
14.14 km
Detect when firing (air)
ƒAir detectability 7.03 km + gun-firing bloom 2.54 km = 9.57 km. The bloom tracks main-battery caliber 127 mm × 0.020 = 2.54 km.
9.57 km
Detect when on fire (sea)
ƒSea detectability 11.16 km + 2.0 km while burning = 13.16 km.
13.16 km
Detect when on fire (air)
ƒAir detectability 7.03 km + 3.0 km while burning = 10.03 km.
10.03 km
Guaranteed Detect2 km
✦
Consumables
Damage Control Party∞ charges · 60 s reload · 5 s active
Smoke Generator3 charges · 130 s reload · 30 s emit / 70 s cloud active · 450 m radius
Defensive AA Fire3 charges · 140 s reload · 25 s active · ×2 flak burst boost
ƒRepeats the flak burst pattern ×2 within each salvo - more clouds in the air over the salvo, at the same spots.
Torpedo Reload Booster1 charges · 300 s reload · 1 s active · 8 s torpedo launchers reload time
ƒWhile active, torpedo tubes reload in this time instead of the full reload, letting you fire a second spread right after the first.
Module options (3)

Stats above use the fully-upgraded modules. These are the research-tree alternatives; trade-offs are flagged.

HullUpgrade
  • Hit points23,900 → 26,400
  • Rudder shift10.1 → 7.2 s
  • Close-range AA DPS13 → 48
  • Maximum AA range2.4 → 3.5 km
Fire controlUpgrade
  • Main battery range12,850 → 14,135 m
TorpedoesUpgrade
  • Range10.47 → 11 km
  • Reload70 → 60 s
  • Alpha damage46,600 → 49,600
  • Display damage15,533 → 16,533
  • Speed61 → 63 kt

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 cruiserStandard
The standard cruiser dispersion curve.
Shell scatter width @ 5 km67.5 m
(166.7 × (8 − 1.1) / 1000 + 1.1) × 30 = 67.5 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 km102 m
(333.3 × (8 − 1.1) / 1000 + 1.1) × 30 = 102 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 km27.8 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·Rmax=0.5·14135=7068 m, and radiusOnMax=0.6 at 14135 m. Below the kink: k=0.2+(0.5−0.2)·50007068=0.4122, so σV=σH·k=67.5·0.4122=27.8m.
Shell scatter height @ 10 km55.2 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·Rmax=0.5·14135=7068 m, and radiusOnMax=0.6 at 14135 m. Above the kink: k=0.5+(0.6−0.5)·10000−706814135−7068=0.5415, so σV=σH·k=102·0.5415=55.2m.
AP pen 5 km104 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·K·m0.69·d−1.07·v1.38 =10−7·2598·250.69·0.127−1.07·463.71.38=104mm, where 463.7 m/s is the shell's speed when it arrives at 5 km (from 792 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 km55 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·K·m0.69·d−1.07·v1.38 =10−7·2598·250.69·0.127−1.07·290.81.38=55mm, where 290.8 m/s is the shell's speed when it arrives at 10 km (from 792 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 km8.28 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, adrag=kρv2, where ρ is air density from a standard-atmosphere profile and k bundles the shell's drag coefficient, caliber and mass: k=πCdd28m=π·0.347·0.12728·24.5=8.97×10−5. That runs from a 792 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 km8.17 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, adrag=kρv2, where ρ is air density from a standard-atmosphere profile and k bundles the shell's drag coefficient, caliber and mass: k=πCdd28m=π·0.347·0.12728·25=8.79×10−5. That runs from a 792 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.
Guns per full salvo (alpha, DPM)12
6 mounts × 2 barrels = 12; all 12 bear on the broadside.

Model inputs

Krupp (AP)2,598
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 mass25 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 coefficient0.347
Air drag on the AP shell in flight; lower keeps velocity, and with it penetration, at long range.
AP muzzle velocity792 m/s
Starting speed of the AP shell; penetration scales with velocity^1.38.
HE muzzle velocity792 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.
minRadius1.1
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 time4.7 s
800 m / (63.0 kt × 2.6855) = 4.7 s. detectability / (speed kt x 2.6855 m/s per knot on the game clock).
Torpedo speed63.0 kt
Travel time to max range65 s
11000 m / (63.0 kt × 2.6855) = 65 s. range / (speed kt x 2.6855 m/s per knot on the game clock).
Tube count8
2 launchers × 4 tubes.
Per-side salvo4 torpedoes
8 wing tubes / 2 = 4: the launchers sit one per beam, so only half of them reach any one side. Each launcher reloads on its own, so she can fire one beam, turn, and fire the other without waiting.
Full-salvo damage132,264
All tubes hitting one target: tubes x per-torpedo simulated damage = 8 x 16,533 = 132,264. Each hit on the target's torpedo belt is reduced by its torpedo protection %.

AA defense

AA DPS at max range117
Only families that reach 5 km contribute at the outer edge of the AA bubble. In-game families: 40mm Bofors Mk1 8x2 -> 151 DPS @ 3.5 km; Far AA (?) -> 117 DPS @ 5 km.
AA DPS layered by range117 DPS @ 5 km, 268 DPS @ 3.5 km
@ 5 km: 117 from one family; @ 3.5 km: 151 + 117 = 268. 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-blank268
151 + 117 = 268 DPS: the sum of every family's average DPS, achievable only inside the closest-range family (3.5 km).
AA threat index1114
151 × 3.5 + 117 × 5 = 1114. 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.
Open in Charting Tool

Ship Charts

Background

A light American-built Atlanta-class cruiser designed for use in joint operations with destroyers. Compared with the initial project, she had enhanced short-range AA armament at the cost of a reduced number of main battery turrets.

Armor Beta

Hull HP 23,900 → 26,400 with hull upgrade, distributed across 5 hull zones, each with its own plate thicknesses, saturation cap, and pen thresholds.

Bow & stern30 mm

Overmatched by AP from only TsurugiGeorgia WGeorgia. Angled, everything else bounces.

Belt / citadel89 mm

Thin belt: battleship AP citadels straight through it broadside. Rely on angle, speed and concealment, never sit flat.

Farming6 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
Bow30 mm primary (range 13–30 mm)1,200 (5% of HP)
Overmatch not possible in its bracketAngle bounces 410mm30 mm: HE pens from 203mm+
Bow-tank fits behind this exterior plate. Saturation is FAST here; the cap is often only a few thousand HP.
Hull (midship)89 mm primary (range 6–89 mm)19,800 (75% of HP)
No common AP caliber overmatches89 mm: standard HE shatters; improved HE (DE / FR BB) pens from 356mm+
Largest HP pool. Citadel sits behind these plates; thinner deck and side plating absorb the rest.
Stern13 mm primary (range 13–30 mm)1,500 (6% of HP)
Overmatched by 203mm+ AP (Aoba, Baleares)Angle bounces 152mm13 mm: HE pens from 127mm+
Mirror of bow. Same fast saturation.
Citadel89 mm primary (range 10–89 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.
Superstructure6 mm primary (range 6–65 mm)2,000 (8% 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 HP13,200 magazine HPTurret knocked outPer-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.
AA mount (40 mm mount)separate HP pool, does not drain ship HP200 per-mount HPDestroyed at 0 HPPer-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 HP7,900 module HPIncapacitated at 0 HPWhen 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 Chumphon. Cards are condensed; use each source link for full context.

Nerf ×2Buff ×14Main Battery ×11Torpedo ×3Concealment ×2
2026-07-30

Ministry of Balance: Anniversary Tune-Up

  • Main battery reload time reduced from 5.8 to 5.5 seconds.
  • HE shell fire-starting chances increased from 5% to 8%.
  • Stock torpedo reload time reduced from 80 to 70 seconds.
  • Upgraded torpedo reload time reduced from 70 to 60 seconds.
  • Stock torpedo speed increased from 58 to 61 knots.
  • Stock torpedo detectability increased from 0.7 to 0.8 km.
  • Upgraded torpedo speed increased from 60 to 63 knots.
  • Upgraded torpedo detectability increased from 0.7 to 0.8 km.
  • Upgraded torpedo distance increased from 10.47 to 11 km.
Read the full official post
2024-11-14

Ministry of Balance: Torpedo Chaos

  • Chumphon is being improved with reduced reload times for her armament.
  • Main battery reload time reduced from 6.0 to 5.8 s.
  • Stock torpedo reload time reduced from 90 to 80 s.
  • Upgraded torpedo reload time reduced from 80 to 70 s.
Read the full official post
2023-06-15

Ministry of Balance: Italian Concerto

  • Main Battery reload time reduced from 6.5 to 6 s.
  • Stock Torpedo reload time reduced from 95 to 90 s.
  • Upgraded Torpedo reload time reduced from 86 to 80 s.
Read the full official post
Exteriors

Skins & permanent camouflages

Every custom exterior Chumphon can equip.

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.