World of Warships: Legends ship guide

Coronel Bolognesi

Also called: 博洛涅西上校 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 Defensive AA on a flank that was already covered
Key characteristics
Strong secondaries (5 km)SmokeDefensive AARepairs citadel hitsLong heal windowWide torpedo sonar
On this page
Community Data

Coronel Bolognesi Community Stats

Across 910+ Standard battles from 74 players, Coronel Bolognesi averages a 61% win rate, 53,500 damage and 1.1 kills per battle, and survives 41% of them.

Community Data

Coronel Bolognesi Community Stats

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Playstyle

Overview

Coronel Bolognesi is a Tier VI Pan-American 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: best repairs citadel hits in T6 CAs (50, 3rd of 14) and Sonar torpedo range in T6 CAs (3.8 km, 5th of 39).

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. Shooting from the cloud gives you away at 5.4 km, and a destroyer here is spotted at about 6.9 km, so you see it coming with roughly 1.5 km to spare. Vision is mutual: past the 2 km guaranteed ring you cannot see out either, and only your Sonar bubble (4.2 km) sees out; past that you are shooting at what a teammate holds lit. Enemy sonar (about 4.2 km) and radar (about 9 km) read straight in regardless. At 600 m the screen is wider than standard, so it can cover a teammate holding the same line as well as your own hull. Once the rudder is over she turns tightly for her cohort (600 m), so a committed turn costs less water than most of what she is fighting.

Potato Avoidance

Burning Defensive AA on a flank that was already covered

Stacked behind two other AA ships you add a few seconds of overkill to a squadron that was dying anyway. It burns its full 25 s whether or not anything is still in the air, so it pays where your AA is the AA that matters: over a lone destroyer, over a cap your team has to hold, or once a strike has clearly picked you.

Signature Traits

ELITE REPAIR PARTY ↗
  • Repairs citadel hits · 50%
  • Long heal window · 28 s
Wide torpedo sonar ↗

3.8 km Sonar torpedo-detection range, top decile of T6 CAs. More reaction time on incoming torps.

Lingering smoke ↗

103 s smoke cloud linger, top decile of T6 CAs. Each puff stays up longer after you stop laying it, holding the shield.

Smoke cruiser

Smoke on a cruiser is rare. Fight from concealment, then disengage.

Acquisition

How to get Coronel Bolognesi

Coronel Bolognesi is available in the Advanced Sonar Cruisers branch of the Pan-America 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 Mar 2026 – Apr 2026 (temporary crate drops, now ended).

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

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

Coronel Bolognesi sits in the Advanced Sonar Cruisers branch. The highlighted path shows the local branch context inside the full Pan-America tree.

Best listed chance for this ship

Official WG availability sources
  • Pan-American Cruisers Are Coming to Early Access Early Access Start: 2026-03-27 · End: 2026-04-29
    • Check out the new Pan-American Cruiser crate for a chance to receive Tier III–VIII Pan-American cruisers: Córdoba, La Argentina, Almirante Cochrane, Coronel Bolognesi, Ignacio Allende, and Santander.
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 →

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Cohort position

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Where Coronel Bolognesi 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.

Top 10%Air detection6.44 km (3/44) Top 10%Main dispersion125.7 m (5/44) Top 25%Concealment11.23 km (9/44) Top 25%Smoke fire bloom5.43 km (11/44) Top 25%Turning circle600 m (7/44) Top 25%Main battery reload6 s (7/44) Top 25%HE DPM189,000 (9/37) Top 25%AP DPM288,000 (10/43) Top 25%Displacement11,090 t (12/44) Top 25%Effective HE DPM (incl. fire)249,573 (10/37) Top 25%Secondary range5 km (8/39) Bottom 25%HE fire chance9% (30/37) Bottom 25%Time to 90% speed25.5 s (37/44) Bottom 25%Acceleration (0-12 kt)9.2 s (36/44) Bottom 25%Power / turn radius120.8 hp/m (39/44) Bottom 25%Power-to-weight6.54 hp/t (36/44) Bottom 25%Flak damage per salvo (expected)324 (37/43) Bottom 10%Engine power72,500 hp (41/44)
See 35 mid-pack stats

Not standouts for Coronel Bolognesi -- 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 points35,400 HP(20/44) Max speed32.5 kt(28/44) Rudder shift8.6 s(19/44) Main battery caliber152 mm(32/44) Main battery range14.76 km(29/44) Sigma2(24/44) Fires per minute8.1(11/37) AP shell damage3,200(33/43) Secondary DPM (per side)120,000(13/39) Secondary HE alpha1,500(21/39) Secondary fire chance6%(23/39) Secondary HE pen17 mm(29/39) AP velocity841 m/s(23/43) HE velocity841 m/s(20/37) AP fuse timer0.025 s(27/43) AP arming threshold25 mm(13/43) AP pen at 10 km154 mm(25/43) AA DPS274(20/44) AA range5 km(15/44) AA threat1,030(17/44) Torpedo range8 km(25/34) Torpedo damage≈14,767(17/34) Torpedo speed61 kt(21/34) Torpedo reaction time7.9 s(20/34) Torpedo reload72 s(10/34) Repair heal rate0.7 %/s(8/14) Max armor114 mm(23/44) Citadel belt114 mm(19/44) Bow armor16 mm(25/44) Stern armor16 mm(25/44) NormSecondary dispersion bracket57(38 of 39 tied at this value) 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) NormRepair charges2(11 of 14 tied at this value)
Survivability
Hit PointsInitial: 31,100 → 35,400
Displacement11,090 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.
169.4 x 18.89 m
Armor range9–114 mm
Plate armor thicknesses9, 10, 16, 19, 25, 30, 32, 38, 51, 114 mm
Armor material/layer entries48
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 × 35,400 HP = 3,186 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 × 35,400 HP = 3,540 HP on this ship.
0.25% of HP per second
Torp Reduction
ƒ1 − 0.32 hull torpedo-damage coefficient / 0.333 unprotected baseline = 4%. Reduces torpedo hit damage. It does not affect flooding: floods start as often and tick at the full rate.
4%
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.
15,700
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.
10,600
Effective HP
ƒBase 35,400 HP plus everything Repair Party can restore: 0.007 of max HP per second (0.7%) × 28 s × 35,400 HP = 6,938 HP per charge, × 2 charges = 13,877 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. Repair Party is one choice in its slot on this ship, so this applies only if you take it.
49,277
Repairable: penetration50%
Repairable: citadel50%
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 × 1,300 = 2,600), 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.
1,300
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 × 4,500 = 9,000), 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.
4,500
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 × 26,600 = 53,200), 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.
26,600
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 × 3,800 = 7,600), 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 ×. 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.
3,800
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 × 1,100 = 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 ×. 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
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
ModuleArtillery: 152 mm/50 BL Mk.XXIII
Mounts / barrels3 mounts / 9 barrels
Reload timeInitial: 7 s → 6 s
Firing range (base)13.4 km
Firing range (top fire control)14.8 km
Turret traverse9 °/s
Turret armor102 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.
3x ±140°
Guns to bear
ƒ180° − 140° (the most restricted aft-facing mount's arc) = 40° 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.
40° off bow / 40° off stern
Shell Grouping (σ)2
Dispersion type
ƒIn practice: 7% tighter (better) horizontal dispersion and 7% less vertical spread at max range (14.8 km) than a standard cruiser: about 126 m wide × 75 m tall, against 135 m × 81 m. 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
ƒHorizontal dispersion ellipse width at max range, from the dispersion model: σH=(R30·idealRadius−minRadiusidealDistance+minRadius)·30 =(14757.630·8−0.51000+0.5)·30=125.7m
125.7 m at 14.8 km
Max Vert Disp
ƒVertical dispersion ellipse height at max range: σV=σH·radiusOnMax =125.7·0.6=75.4m
75.4 m at 14.8 km
Med Horiz Disp
ƒ50%-hit horizontal radius: σH,50=σH·0.6σ =125.7·0.62=37.7m
37.7 m at 14.8 km
Med Vert Disp
ƒ50%-hit vertical radius: σV,50=σV·0.6σ =75.4·0.62=22.6m
22.6 m at 14.8 km
Turret turn time
ƒ180 degrees / 9 deg/s traverse speed = 20 s.
20 s
Shells/min
ƒZero upgrades: 9 broadside guns x 60 / 7 s base reload = 77.1. All upgrades (top gun): 9 broadside guns x 60 / 6 s all-upgrades reload = 90.
Initial: 77.1 → 90
HE shells
HE alpha2,100
HE Velocity841 m/s
Fire Chance9%
HE fire DPM vs T6 BB60573
Effective HE DPM vs T6 BB249573
HE penetration
ƒ25 mm ≈ 152 mm caliber / 6 (standard HE penetration ratio).
25 mm
HE full-salvo alpha
ƒ2,100 HE damage x 9 broadside guns = 18,900.
18,900
HE DPM
ƒZero upgrades: 18,900 HE full-salvo alpha x 60 / 7 s base reload = 162,000. All upgrades (top gun): 18,900 HE full-salvo alpha x 60 / 6 s all-upgrades reload = 189,000.
Initial: 162,000 → 189,000
Fires/min
ƒZero upgrades: 77.1 shells/min × 0.09 (9% fire chance) = 6.94. All upgrades (top gun): 90 shells/min × 0.09 (9% fire chance) = 8.1.
Initial: 6.94 → 8.1
AP shells
AP alpha3,200
AP Velocity841 m/s
Min Ricochet45 deg
Guaranteed Ricochet60 deg
Fuse Timer0.025 s
Fuse Threshold25 mm
AP overmatch
ƒfloor(152 mm caliber / 14.3) = 10 mm (AP auto-penetrates plating this thick or less).
10 mm
AP Pen Close
ƒAP formula evaluated at muzzle velocity: P=10−7·K·m0.69·d−1.07·v01.38 =10−7·2609·54.80.69·0.152−1.07·8411.38=337.2mm.
337.2 mm point-blank
AP Pen Far
ƒSame formula at the ship's max firing range (14.8 km), where the shell has slowed to 382.8 m/s: P=10−7·2609·54.80.69·0.152−1.07·382.81.38=113.8mm.
113.8 mm at 14.8 km
AP full-salvo alpha
ƒ3,200 AP damage x 9 broadside guns = 28,800.
28,800
AP DPM
ƒZero upgrades: 28,800 AP full-salvo alpha x 60 / 7 s base reload = 246,857. All upgrades (top gun): 28,800 AP full-salvo alpha x 60 / 6 s all-upgrades reload = 288,000.
Initial: 246,857 → 288,000
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.
15
Torpedoes
ModuleTorpedoes: 533 mm TR Mk IV
Launchers / tubes2 launchers × 3 tubes = 6 tubes
Reload time72 s
Projectile speed61.0 kt
Range8 km
Maximum simulated damage
ƒMost 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=44,300·0.333=14,767. 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.
≈ 14,767
Maximum damage (ammunition)
ƒ44,300 warhead alpha / 3 + 1,100 blast = 15,867. 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.
15,867
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 detectability1.3 km
Reaction time
ƒHow long a target has to dodge after your torpedo is spotted at its detectability range (lower means less warning): treact=1.3 km61 kt×2.6855=7.9 s. 2.6855 converts knots to m/s on the game clock. Base value; commander torpedo-concealment skills lower it further.
7.9 s
Flooding chance
ƒThis torpedo carries a flooding-chance value of 2.65 per hit, shown as 2.65×100=265%. 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.
265%
Torpedo launcher traverse25 °/s
Launch arcswing 150° (one launcher per beam)
Torp Turn
ƒTime to rotate the launchers 180 deg: tturn=180°25°/s=7.2s.
7.2 s
Torp Arming194 m
Per-side salvo damage
ƒOne side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 3 x 14,767 = 44,301. Each hit on the target's torpedo belt is reduced by its torpedo protection %.
44,301
AA Defense
AA mount points13
Maximum AA range
ƒLongest-reaching family on the in-game AA card. Base AirDefense aura max range is 3.5 km; dual-purpose mount auras extend it.
5 km
40 mm/56 OQF Mk.XI (upgraded hull only)5×2 40mm
40 mm/56 OQF Mk.IIIInitial: 13×1 → 8×1 40mm
102 mm/45 QF Mk.XVI (DP)
ƒDual-purpose: your secondaries doing double duty against aircraft. The same mounts appear on the Secondary Battery card - shared guns, not extra hardware.
4×2 102mm
Far aura
Guns102 mm/45 QF Mk.XVI (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 47 from dual-purpose secondaries firing as AA in this range band.
47
Range5 km
Medium aura
Guns40 mm/56 OQF Mk.III + 40 mm/56 OQF Mk.XI
Continuous DPS
ƒInitial: 63 × 3.5 × 0.9 = 198 → 72 × 3.5 × 0.9 = 227. Raw aura damage × 3.5 × hit probability, the same in-game units as the Close-range AA DPS headline.
Initial: 198 → 227
Range3.5 km
Total DPS in Aura
ƒFar 47 + Medium 227 = 274
274
Flak
AA explosions
ƒEach ~2 s salvo fires 2 AA explosions in quick succession, each leaving 1 cloud ahead of the attacking squadron - up to 2 clouds per salvo × 180 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, 1 cloud each
Cloud damage
ƒDamage a plane takes for flying into one flak cloud, before any reductions.
180
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 secondary battery mount is operational - even losing every dedicated AA mount does not stop it.
Secondary 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
S
Secondary Battery
Mounts4
Firing range5.0 km
Shell Grouping (σ)1
Secondary DPM (per side)
ƒSum 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: 4×2 102 mm (4/side) × 60/3 s × 1500 = 120,000. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).
120,000
Secondary fire DPM vs T6 BB (per side)
ƒFires/min (per side) 4.8 × (1 − 0.3 fire resistance) × 60 s × 0.003 of max HP per second × 59,350 HP = 35,895. 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.
35,895
Total secondary DPM vs T6 BB (per side)
ƒSecondary DPM (per side) 120,000 + secondary fire DPM 35,895 = 155,895: shell damage plus fire damage against one T6 battleship, every shell hitting.
155,895
102 mm/45 QF Mk.XVI (DP)
ƒDual-purpose: the same mounts also fire at aircraft, so they appear on the AA Defense card too - shared guns, not extra hardware.
4×2 102mm
Caliber102 mm
Reload time3 s
HE alpha1,500
Muzzle Velocity811 m/s
Fire Chance6%
Secondary fires/min (per side)
ƒ4×2 barrels / 2 sides × 60 / 3 s × 0.06 (6% fire chance) = 4.8. 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.
4.8
HE Pen17 mm
Secondary dispersion type
ƒMax dispersion = range (km) × 57 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.
Standard
Max secondary dispersion @ 5 km
ƒ5 km × 57 + 30 = 315 m.
315 m
Maneuverability
Engine power72,500 hp
Maximum speed32.5 kt
Turning circle radius600 m
Rudder shift timeInitial: 12.1 s → 8.6 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.
29.2 s
Engine boost threshold (reverse)
ƒSpeed below which the engine's built-in power boost applies in reverse.
10.0 kt
Acceleration 0-90%
ƒTime to reach 90% of top speed (29.2 kt of 32.5 kt).
25.5 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.
41 s
Guns in a full turn
ƒWith the rudder hard over the hull turns 6.1°/s, so a target drifts across the bow at that rate. Turret traverse minus hull turn: 9 − 6.1 = +2.9°/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 (+2.9°/s spare)
Concealment
Detectability by sea
ƒBase value, no camouflage. With a Grade IV permanent camo (or any disposable camo): 11.23 km x 0.955 = 10.72 km. Camouflage does not change detectability by air.
11.23 km
With Grade IV camouflage (sea)
ƒDetectability by sea 11.23 km x 0.955 (Grade IV permanent camo or any disposable camo) = 10.72 km.
10.72 km
Detectability by air6.44 km
Smoke firing penalty5.43 km
Detect when firing (sea)
ƒLarger of 14.76 km range and 5.43 km smoke firing penalty = 14.76 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.
14.76 km
Detect when firing (air)
ƒAir detectability 6.44 km + gun-firing bloom 3.04 km = 9.48 km. The bloom tracks main-battery caliber 152 mm × 0.020 = 3.04 km.
9.48 km
Detect when on fire (sea)
ƒSea detectability 11.23 km + 2.0 km while burning = 13.23 km.
13.23 km
Detect when on fire (air)
ƒAir detectability 6.44 km + 3.0 km while burning = 9.44 km.
9.44 km
Guaranteed Detect2 km
✦
Consumables
Damage Control Party∞ charges · 60 s reload · 5 s active
Advanced Sonar2 charges · 120 s reload · 90 s active · 4.2 km ship detect
ƒDerived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): 140×301000=4.2 km
· 3.75 km torpedo detect
ƒDerived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): 125×301000=3.75 km
Choose one
Smoke Generator2 charges · 240 s reload · 15 s emit / 103 s cloud active · 600 m radius
Repair Party2 charges · 80 s reload · 28 s active · 6,938 HP (19.6% of max HP) total heal (per charge)
ƒ0.007 of max HP per second (0.7%) × 28 s effective active time = 0.196 of max HP × 35,400 HP = 6,938 HP: up to 19.6% of max HP restored per charge.
· 13,876 HP (39.2% of max HP) total heal (all charges)
ƒ0.196 of max HP per charge × 2 charges = 0.392 × 35,400 HP = 13,876 HP: up to 39.2% of max HP if the whole Repair Party loadout is used.
· 248 HP/s (0.7% of max HP) heal per second
ƒ0.007 (0.7% of max HP) × 35,400 HP = 248 HP/s. WoWS heals a flat percent of MAX HP each second, so this rate holds at any health level.
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.
Module options (3)

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

HullUpgrade
  • Hit points31,100 → 35,400
  • Rudder shift12.1 → 8.6 s
  • Close-range AA DPS63 → 72
Fire controlUpgrade
  • Main battery range13,416 → 14757.6 m
ArtilleryUpgrade
  • Base reload7 → 6 s

Under the hood

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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 cruiser7% tighter H · 7% shorter V
H = horizontal, V = vertical spread. This ship's curve against the standard cruiser curve, both evaluated at this ship's max range (14.8 km) with the same model as Max Horiz/Vert Disp: horizontal 126 / 135 m − 1 = -7%, vertical 75 / 81 m − 1 = -7%. Shell grouping (σ) is separate: it sets how shells bunch toward the centre of this ellipse.
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 km21.2 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=0.5·14757.6=7379 m, and radiusOnMax=0.6 at 14757.6 m. Below the kink: k=0.2+(0.5−0.2)·50007379=0.4033, so σV=σH·k=52.5·0.4033=21.2m.
Shell scatter height @ 10 km48.2 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=0.5·14757.6=7379 m, and radiusOnMax=0.6 at 14757.6 m. Above the kink: k=0.5+(0.6−0.5)·10000−737914757.6−7379=0.5355, so σV=σH·k=90·0.5355=48.2m.
AP pen 5 km226 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 =10−7·2609·54.80.69·0.152−1.07·628.31.38=226mm, where 628.3 m/s is the shell's speed when it arrives at 5 km (from 841 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 km154 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 =10−7·2609·54.80.69·0.152−1.07·476.41.38=154mm, where 476.4 m/s is the shell's speed when it arrives at 10 km (from 841 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 km5.98 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·0.2884·0.15228·50.8=5.15×10−5. That runs from a 841 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 km5.83 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·0.2884·0.15228·54.8=4.77×10−5. That runs from a 841 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)9
3 mounts × 3 barrels = 9; all 9 bear on the broadside.

Model inputs

Krupp (AP)2,609
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 mass54.8 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 coefficient0.2884
Air drag on the AP shell in flight; lower keeps velocity, and with it penetration, at long range.
AP muzzle velocity841 m/s
Starting speed of the AP shell; penetration scales with velocity^1.38.
HE muzzle velocity841 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 time7.9 s
1300 m / (61.0 kt × 2.6855) = 7.9 s. detectability / (speed kt x 2.6855 m/s per knot on the game clock).
Torpedo speed61.0 kt
Travel time to max range48.8 s
8000 m / (61.0 kt × 2.6855) = 48.8 s. range / (speed kt x 2.6855 m/s per knot on the game clock).
Tube count6
2 launchers × 3 tubes.
Per-side salvo3 torpedoes
6 wing tubes / 2 = 3: 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 damage88,602
All tubes hitting one target: tubes x per-torpedo simulated damage = 6 x 14,767 = 88,602. Each hit on the target's torpedo belt is reduced by its torpedo protection %.

AA defense

AA DPS at max range47
Only families that reach 5 km contribute at the outer edge of the AA bubble. In-game families: 40mm Bofors Twin 5x2 -> 87 DPS @ 3.5 km; 40mm Bofors Mark VII single 8x1 -> 140 DPS @ 3.5 km; 4in45 QF Mk XIX 4x2 -> 47 DPS @ 5 km.
AA DPS layered by range47 DPS @ 5 km, 274 DPS @ 3.5 km
@ 5 km: 47 from one family; @ 3.5 km: 87 + 140 + 47 = 274. 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-blank274
87 + 140 + 47 = 274 DPS: the sum of every family's average DPS, achievable only inside the closest-range family (3.5 km).
AA threat index1030
87 × 3.5 + 140 × 3.5 + 47 × 5 = 1030. 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 firepower

Max HE alpha1500
The only family (102 mm): 1500. Maximum HE damage per shell across secondary HE families. Best on this ship: 1500 from the 102 mm family.
Max HE fire chance6%
The only family (102 mm): 6%. Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 6% from the 102 mm family.
Max HE pen17 mm
The only family (102 mm): 17 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: 17 mm from the 102 mm family.
Open in Charting Tool

Ship Charts

Background

HMS Ceylon, a Crown Colony-class cruiser, served in the Pacific and Indian Oceans at the end of World War II. In the 1950s, she participated in the Korean War and the Suez Crisis. In 1959, HMS Ceylon was sold to Peru, where she served under the name Coronel Bolognesi until the early 1980s.

Armor Beta

Hull HP 31,100 → 35,400 with hull upgrade, distributed across 5 hull zones, each with its own plate thicknesses, saturation cap, and pen thresholds.

Bow & stern16 mm

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

Belt / citadel114 mm

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

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
Bow16 mm primary (range 16–30 mm)1,100 (3% 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)25 mm primary (range 19–38 mm)23,600 (67% 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.
Stern16 mm primary (range 16–38 mm)1,000 (3% of HP)
Overmatched by 283mm+ AP (Graf Spee, Scharnhorst)Angle bounces 203mm16 mm: HE pens from 127mm+
Mirror of bow. Same fast saturation.
Citadel114 mm primary (range 9–114 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.
Superstructure10 mm primary (range 10–114 mm)3,400 (10% 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 HP15,700 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.
Secondary mount (102 mm mount)separate HP pool, does not drain ship HP800 per-mount HPDestroyed at 0 HPPer-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 (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 HP9,400 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 Coronel Bolognesi. Cards are condensed; use each source link for full context.

Buff ×19Main Battery ×2
2026-06-25

Ministry of Balance: Skillful Adjustments

  • Stock maximum speed increased from 31.5 to 32.5 kts.
  • Upgraded maximum speed increased from 31.5 to 32.5 kts.
  • Stock main battery reload time reduced from 7.5 to 7 s.
  • Upgraded main battery reload time reduced from 6.5 to 6 s.
  • Engine HP increased from 31,400 to 35,400.
  • Stock hull ship HP increased from 27,100 to 31,100:
  • Stock bow HP increased from 1,000 to 1,100.
  • Stock auxiliary spaces HP increased from 3,400 to 3,900.
  • Stock stern HP increased from 900 to 1,000.
  • Stock hull HP increased from 20,300 to 23,300.
  • Stock steering gear HP increased from 8,100 to 9,300.
  • Stock superstructure HP increased from 2,900 to 3,300.
  • Upgraded hull ship HP increased from 31,400 to 35,400:
  • Upgraded bow HP increased from 1,100 to 1,300.
  • Upgraded auxiliary spaces HP increased from 3,900 to 4,500.
  • Upgraded stern HP increased from 1,000 to 1,100.
  • Upgraded hull HP increased from 23,600 to 26,600.
  • Upgraded steering gear HP increased from 9,400 to 10,600.
  • Upgraded superstructure HP increased from 3,400 to 3,800.
Read the full official post
Exteriors

Skins & permanent camouflages

Every custom exterior Coronel Bolognesi 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.