GamingDiver / WoWs Legends Ships / Rio de Janeiro

World of Warships: Legends ship guide

Rio de Janeiro

Also called: 里约热内卢 Beta

Pan-America · Tier IV · Battleship · Premium

AP-DPM battleshipHigh gun throughput: keep the mains firing and bleed every broadside that shows.

Playstyle

Hold 12-15 km on a flank with firing arcs into rotating cruisers and broadside BBs
Avoid: Taking the long way round the map edge to flank

Key characteristics

High HE / fire outputImproved HE penHigh AP DPMLobs over islandsBurny secondariesThick stern plate

On this page

Community stats
Playstyle
How to get Rio de Janeiro
Builds
Cohort position
Stats and specs
Armor
Charts
Exteriors

Community Data

Rio de Janeiro Community Stats

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

Playstyle

Overview

Rio de Janeiro is a Tier IV Pan-American AP-DPM battleship (219,484 AP DPM): her main battery throughput is top-decile, so the kit pays out by punishing every broadside she catches rather than waiting for a perfect alpha salvo. Keep the guns reloading on targets, not on cover. HE pen sits at the 1/4 caliber ratio instead of the standard 1/6, so HE spam is a real damage option here. Standout traits: best HE DPM in T4 BBs (140,903) and best fires per minute in T4 BBs (8.7).

Positioning

Hold 12-15 km on a flank with firing arcs into rotating cruisers and broadside BBs. The kit's value is salvo cycle count, so prioritize a position where the next reload always has a target; bow on between salvos and trade angles rather than holding broadside for a single shot.

Potato Avoidance

Taking the long way round the map edge to flank

At 22 kn five minutes of sailing buys about 3.4 km, so a border run costs most of the mid-game and arrives after the fight it was meant to decide. She wins by holding a lane and trading from it: pick the flank before the first salvo, then let the guns do the travelling.

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 6/24 T4 BBs.

ELITE MAIN BATTERY ↗

HE DPM machine · 140903 HE
High fire pressure · 8.67 fires

Burny secondaries ↗

12% best HE fire chance per secondary shell (before target resistance), best of T4 BBs. Stacks fires faster than peers in a brawl.

ELITE ARMOR ↗

Thick stern plate · 30 mm
Thick deck · 229 mm
Heavy magazine · 38 mm
Armored casemates · 229 mm

Acquisition

How to get Rio de Janeiro

Rio de Janeiro is a Premium ship and not available to unlock in the Tech Tree. Acquisition path: Premium/Event.

Premium/EventAvailability usually depends on store rotations, event reruns, collaborations, coupons, or special offers.

Builds

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

Open in Build Tool →

Commanders frequently paired with this ship AL Harbin Chen Shaokuan Deng Shichang

Have a build you swear by? Open it in the Build Tool and hit Save build to share it here.

Cohort position

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Where Rio de Janeiro sits among Tier IV BBs (23 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.

BestFires per minute8.67 (1/24) BestHE DPM140,903 (1/24) BestSecondary fire chance12% (1 of 3 tied) BestEffective HE DPM (incl. fire)203,637 (1/24) BestStern armor30 mm (1 of 2 tied) BestDeck armor229 mm (1/24) Top 10%AP DPM219,484 (2/24) Top 10%Secondary DPM (per side)320,100 (2/24) Top 10%Repair heal rate0.66 %/s (3/24) Top 25%Smoke fire bloom9.96 km (5/24) Top 25%AP velocity831 m/s (7/24) Top 25%AP arming threshold51 mm (6/24) Top 25%Max armor305 mm (7/24) Bottom 25%Main battery caliber305 mm (19/24) Bottom 25%Sigma1.7 (19/24) Bottom 25%Main dispersion211.8 m (22/24) Bottom 10%AP pen at 10 km259 mm (23/24) WorstNo AA (1 of 24 in cohort) WorstNo torpedoes (21 of 24 in cohort)

See 25 mid-pack stats

Not standouts for Rio de Janeiro -- 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 points48,400 HP(10/24) Max speed22 kt(17/24) Concealment13.05 km(9/24) Air detection10.44 km(9/24) Rudder shift13.5 s(18/24) Turning circle670 m(15/24) Traverse-to-turn ratio3.1 ×(12/24) Main battery range14.88 km(10/24) Main battery reload31 s(18/24) HE fire chance32%(9/24) Secondary HE alpha2,200(7/23) Secondary HE pen25 mm(9/23) HE velocity831 m/s(11/24) Acceleration37.8 s(17/24) AP fuse timer0.01 s(16/24) Engine power34,000 hp(15/24) Turn-speed retention50.7 hp/m(16/24) Displacement31,860 t(16/24) Power-to-weight1.07 hp/t(18/24) Repair charges3(11/24) Citadel belt229 mm(13/24) Bow armor19 mm(11/24) NormSecondary dispersion bracket57(20 of 24 tied at this value) NormTurn speed retained81%(23 of 24 tied at this value) NormSecondary range4 km(14 of 24 tied at this value)

Peers in this cohort

Compare Tier IV Battleships

Show all 23 peers

Stats & specs

Customize in the Build Tool →

Survivability

Hit Points48,400

Displacement31,860 t

Hull dimensions

Length x beam at the waterline, with the hull's draft where the client carries one. Ships whose client entry holds only the 260 x 20 m placeholder use a curated real-world figure instead, and any ship we have no trustworthy size for omits this row rather than print the placeholder. Length matters when dodging torpedoes; beam and draft shape how hard the ship is to hit.

203.3 x 28.53 m

Armor range13–305 mm

Plate armor thicknesses13, 19, 25, 30, 38, 64, 76, 102, 152, 229, 305 mm

Armor material/layer entries84

Fire resistance

Does not reduce the damage a burning fire does per second: replay-measured burn ticks run at the full rate on every ship. By elimination it lowers how often hits set you on fire; ignition-rate replay data is consistent with that but too confounded by attacker mix to measure the reduction directly.

16.6%

Fire duration60 s

Fire damage

Each fire ticks 0.3% of max HP per second for the full 60 s, so one unattended fire burns 18% of the pool (8,712 HP on this ship). 4 fire points can burn at once. Verified against measured burn ticks in replay data.

0.3% of HP per second

Flood duration40 s

Flood damage

A flood ticks 0.5% of max HP per second for the 40 s duration, so one unattended flood costs 20% of the pool (9,680 HP on this ship). Verified against measured flood ticks in replay data.

0.5% of HP per second

Torp Reduction

Reduces torpedo hit damage. Replay data shows no effect on floods: flood ticks run at the full rate and flood frequency does not decline with protection.

19%

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.

24,200

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.

14,500

Effective HP

Base 48,400 HP plus everything Repair Party can restore: 0.66%/s x 28 s = 8,944 HP per charge, x3 charges = 26,833 HP. Ceiling, not a prediction: a charge only restores damage actually taken, and only the regeneratable share of it. Across 1,826 players in our replay corpus the median ship realized about half of this, mostly because half the charges go unspent — when Repair Party IS pressed it returns ~97% of the per-charge figure above.

75,233

Repairable: penetration50%

Repairable: citadel10%

Repairable: steering gear50%

Main Battery

ModuleArtillery: 305 mm/45 QF MK XIII

Mounts / barrels7 mounts / 14 barrels

Reload time31 s

Firing range14.9 km

Turret traverse3 °/s

Turret armor305 mm

Turret traverse arcs

How far each mount can train, in degrees to either side of the mount's own facing, read from in-game data. 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 ±148°, ±146°, 2x ±147°

Guns to bear

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. Mount facing is inferred from turret stations and verified against known layouts, including Izumo's aft-facing forward turret.

32° off bow / 34° off stern

HE fire DPM vs T4 BB62741

Effective HE DPM vs T4 BB203644

Shell Grouping (σ)1.7

Max Horiz Disp

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

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

= (\frac{14882}{30} \cdot \frac{12 - 2.2}{1000} + 2.2) \cdot 30 = 211.8 m

211.8 m at 14.9 km

Max Vert Disp

Vertical dispersion ellipse height at max range:

σ_{V} = σ_{H} \cdot radiusOnMax

= 211.8 \cdot 0.6 = 127.1 m

127.1 m at 14.9 km

Med Horiz Disp

50%-hit horizontal radius:

σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}

= 211.8 \cdot \frac{0.6}{1.7} = 74.8 m

74.8 m at 14.9 km

Med Vert Disp

50%-hit vertical radius:

σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}

= 127.1 \cdot \frac{0.6}{1.7} = 44.9 m

44.9 m at 14.9 km

Turret turn time

180 degrees / 3 deg/s traverse speed = 60 s.

60 s

Shells/min

14 broadside guns x 60 / 31 s base reload = 27.1.

27.1

HE shells

HE Damage5,200

HE Velocity831 m/s

Fire Chance32%

HE penetration

76 mm ≈ 305 mm caliber / 4 (improved HE penetration: German BBs, Yamato-class, and a handful of others).

76 mm

HE full-salvo alpha

5,200 HE damage x 14 broadside guns = 72,800.

72,800

HE DPM

72,800 HE full-salvo alpha x 60 / 31 s base reload = 140,903.

140,903

Fires/min

27.1 shells/min x 32% fire chance = 8.67.

8.67

AP shells

AP Damage8,100

AP Velocity831 m/s

Min Ricochet45 deg

Guaranteed Ricochet60 deg

Fuse Timer0.015 s

Fuse Threshold51 mm

AP overmatch

floor(305 mm caliber / 14.3) = 21 mm (AP auto-penetrates plating this thick or less).

21 mm

AP Pen Close

Canonical community AP formula (jcw780/wows_shell), 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 2187 \cdot {389.8}^{0.69} \cdot {0.305}^{- 1.07} \cdot 831^{1.38} = 510.9 mm

. Matches the in-game spec card.

510.9 mm point-blank

AP Pen Far

Same formula at the ship's max firing range (14.9 km), where the shell has slowed to 416.3 m/s:

P = 10^{- 7} \cdot 2187 \cdot {389.8}^{0.69} \cdot {0.305}^{- 1.07} \cdot {416.3}^{1.38} = 196.8 mm

196.8 mm at 14.9 km

AP full-salvo alpha

8,100 AP damage x 14 broadside guns = 113,400.

113,400

AP DPM

113,400 AP full-salvo alpha x 60 / 31 s base reload = 219,484.

219,484

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.

AA Defense

AA mount points0

Maximum AA range

In-game AA card max range: None km. Only the longest-reach family contributes at this distance.

None km

Secondary Battery

Mounts28

Firing range4.0 km

Shell Grouping (σ)1

Secondary dispersion type

Max 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 @ 4 km

4 km × 57 + 30 = 258 m.

258 m

Caliber152 mm

Reload time5 s

HE Damage2,200

Muzzle Velocity914 m/s

Fire Chance12%

Armor Pen25 mm

Show 2 more gun families

Caliber152 mm

Reload time5 s

HE Damage2,200

Muzzle Velocity914 m/s

Fire Chance12%

Armor Pen25 mm

Caliber76.2 mm

Reload time4 s

HE Damage1,100

Muzzle Velocity823 m/s

Fire Chance4%

Armor Pen13 mm

Maneuverability

Engine power34,000 hp

Maximum speed22 kt

Turning circle radius670 m

Rudder shift time13.5 s

Engine power-boost threshold7 kt

Engine spool-up time23 s

Reverse spool-up time11.5 s

Reverse speed

top speed / 4 + 4.9 = 22 / 4 + 4.9 = 10.4 kt. The community reverse-speed model from the WoWs ShipBuilder project, the same source as the acceleration model on this card. Base value; speed modifiers scale it. Not shown on the in-game card.

10.4 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. Same community-model simulation as the acceleration times, using the ship's own reverse-power ratio from in-game data. The full curve is on the acceleration chart.

48.9 s

Engine boost threshold (reverse)

Speed below which the engine's built-in power boost applies in reverse. Matches the in-game maneuverability card's reverse threshold (Vampire II reads 10.5 here and the card shows 11; the card rounds half up).

6.6 kt

Acceleration 0-90%

Time to reach 90% of top speed (19.8 kt of 22 kt), from our in-house acceleration model.

37.8 s

Acceleration 0-99%

Time to reach 99% of top speed (21.8 kt of 22 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.

62.9 s

Traverse-to-turn ratio

How many degrees the turret can swing for each degree the hull turns. Turn rate

ω_{hull} = \frac{180}{π} \cdot \frac{V_{max} (m/s)}{R_{turn}} = \frac{180}{π} \cdot \frac{22.0 \cdot 0.5144}{670} = 0.97 ° / s

, so

ratio = \frac{ω_{turret}}{ω_{hull}} = \frac{3}{0.97} = 3.1 \times

. Below 5 the turrets drag in a turning fight; 25+ keeps up with any rudder.

3.1× drags

See the full acceleration curve ↓

Concealment

Detectability by sea13.05 km

Detectability by air10.44 km

Smoke firing penalty9.96 km

Detect when firing (sea)

Equal to the ship's main battery range (never below base detectability): firing makes you visible to everyone you can reach. Matches the in-game 'Detect Firing Sea' value on all 8 unmodified captures, and range-modified captures track the modified range.

14.88 km

Detect when firing (air)

Air detectability plus the gun-firing bloom (6.1 km, which tracks main-battery caliber x 0.020). Matches the in-game 'Detect Firing Air' value on every captured ship.

16.54 km

Detect when on fire (sea)

Base sea detectability + 2.0 km while burning; matches the in-game 'Detect Fire Sea' value on every captured ship.

15.05 km

Detect when on fire (air)

Base air detectability + 3.0 km while burning; matches the in-game 'Detect Fire Air' value on every captured ship.

13.44 km

Guaranteed Detect2 km

✦

Consumables

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

Repair Party3 charges · 80 s reload · 28 s active · 8,944 HP (18.5% of max HP) total heal (per charge)
ƒ
Heal per second (0.66%) x effective active time (28 s) = up to 18.5% of max HP restored per charge.
· 26,832 HP (55.5% of max HP) total heal (all charges)
ƒ
18.5% per charge x 3 charges = up to 55.5% of max HP if the whole Repair Party loadout is used.
· 319 HP/s (0.66% of max HP) heal per second
ƒ
0.66% of max HP (48,400 HP) per second = 319 HP/s. WoWS heals a flat percent of MAX HP each second, so this rate holds at any health level.

Secondary Battery Booster3 charges · 160 s reload · 30 s active · +100% grouping · -50% dispersion

See all derived stats

Show ▾

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

Numbers the spec table cannot show directly: alpha-strike math, DPM, dispersion, AP penetration. Click the formula chip on any row to reveal how it is calculated.

Main battery formulas

Shell Grouping (σ)1.7

Max Horiz Disp211.8 m at 14.9 km

Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:  $σ_{H} = (\frac{R}{30} \cdot \frac{idealRadius - minRadius}{idealDistance} + minRadius) \cdot 30$   $= (\frac{14882}{30} \cdot \frac{12 - 2.2}{1000} + 2.2) \cdot 30 = 211.8 m$

Shell scatter width @ 5 km115 m

Horizontal scatter at a fixed 5 km, from the same verified dispersion model as the rows below - a knife-fight-range anchor comparable across ships.

Shell scatter width @ 10 km164 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.

Max Vert Disp127.1 m at 14.9 km

Vertical dispersion ellipse height at max range: $σ_{V} = σ_{H} \cdot radiusOnMax$ $= 211.8 \cdot 0.6 = 127.1 m$

Shell scatter height @ 10 km87.6 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  $delim \cdot R_{m a x} = 0.5 \cdot 14882 = 7441$  m, and  $radiusOnMax = 0.6$  at 14882 m. Above the kink:  $k = 0.5 + (0.6 - 0.5) \cdot \frac{10000 - 7441}{14882 - 7441} = 0.5344$ , so  $σ_{V} = σ_{H} \cdot k = 164 \cdot 0.5344 = 87.6 m$ .

Med Horiz Disp74.8 m at 14.9 km

50%-hit horizontal radius: $σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}$ $= 211.8 \cdot \frac{0.6}{1.7} = 74.8 m$

Med Vert Disp44.9 m at 14.9 km

50%-hit vertical radius: $σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}$ $= 127.1 \cdot \frac{0.6}{1.7} = 44.9 m$

AP Pen Close510.9 mm point-blank

Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity:  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v_{0}^{1.38}$   $= 10^{- 7} \cdot 2187 \cdot {389.8}^{0.69} \cdot {0.305}^{- 1.07} \cdot 831^{1.38} = 510.9 mm$ . Matches the in-game spec card.

AP Pen Far196.8 mm at 14.9 km

Same formula at the ship's max firing range (14.9 km), where the shell has slowed to 416.3 m/s:  $P = 10^{- 7} \cdot 2187 \cdot {389.8}^{0.69} \cdot {0.305}^{- 1.07} \cdot {416.3}^{1.38} = 196.8 mm$ .

AP pen 5 km361 mm

AP penetration at a fixed 5 km, read off the same PC-validated ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the canonical community AP formula  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$ . Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.

AP pen 10 km259 mm

AP penetration at a fixed 10 km, read off the same PC-validated ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the canonical community AP formula  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$ . Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.

AP flight time @ 10 km5.65 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:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.4391 \cdot {0.305}^{2}}{8 \cdot 389.8} = 4.12 \times 10^{- 5}$ . That runs from a 831 m/s muzzle velocity in 0.02 s steps under gravity 9.8 m/s² until the shell lands, then divides by 2.77: the game clock runs faster than real time, and that factor was measured against stopwatch runs in the Training Room. Lower is better, since a faster shell is harder to dodge and needs less lead.

HE flight time @ 10 km5.67 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:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.4391 \cdot {0.305}^{2}}{8 \cdot 386} = 4.16 \times 10^{- 5}$ . That runs from a 831 m/s muzzle velocity in 0.02 s steps under gravity 9.8 m/s² until the shell lands, then divides by 2.77: the game clock runs faster than real time, and that factor was measured against stopwatch runs in the Training Room. Lower is better, since a faster shell is harder to dodge and needs less lead.

HE penetration76 mm

76 mm ≈ 305 mm caliber / 4 (improved HE penetration: German BBs, Yamato-class, and a handful of others).

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) - 0.249 in this case. Lets HE pen ~76mm armor instead of ~50mm. Hits every German cruiser (150mm CL, 203mm CA) and BB (350mm+), British heavy cruisers / Lion / Nelson, a handful of other premiums.

AP overmatch21 mm

floor(305 mm caliber / 14.3) = 21 mm (AP auto-penetrates plating this thick or less).

AP AOE Radius50

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.

Broadside guns used for alpha14

All 14 barrels bear on the broadside.

Turret turn time60 s

180 degrees / 3 deg/s traverse speed = 60 s.

HE full-salvo alpha72,800

5,200 HE damage x 14 broadside guns = 72,800.

AP full-salvo alpha113,400

8,100 AP damage x 14 broadside guns = 113,400.

HE DPM140,903

72,800 HE full-salvo alpha x 60 / 31 s base reload = 140,903.

AP DPM219,484

113,400 AP full-salvo alpha x 60 / 31 s base reload = 219,484.

Shells/min27.1

14 broadside guns x 60 / 31 s base reload = 27.1.

Fires/min8.67

27.1 shells/min x 32% fire chance = 8.67.

AA defense

AA DPS at point-blankNone

In-game AA card sum: None DPS, achievable only when a target is inside the shortest-range AA family. Captured as a point-blank total only -- per-family breakdown not yet recorded for this ship, so the DPS at None km is unknown.

Maximum AA rangeNone km

In-game AA card max range: None km. Only the longest-reach family contributes at this distance.

Secondary battery dispersion

Secondary dispersion typeStandard

Max dispersion = range (km) × 57 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.

Max secondary dispersion @ 4 km258 m

4 km × 57 + 30 = 258 m.

Secondary battery firepower

Secondary DPM (per side)320,100

Sum across all secondary families of (per-side barrels × 60 / reload_s × alpha), where per-side barrels = mounts × barrels-per-mount / 2 (the guns that bear on one broadside target). Per-family: 14×1 152 mm (7/side) × 60/5 × 2200 = 184,800 + 4×1 152 mm (2/side) × 60/5 × 2200 = 52,800 + 10×1 76.2 mm (5/side) × 60/4 × 1100 = 82,500. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).

Max HE alpha2200

Maximum HE damage per shell across secondary HE families. Best on this ship: 2200 from the 152 mm family.

Max HE fire chance12%

Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 12% from the 152 mm family.

Max HE pen25 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: 25 mm from the 152 mm family.

Armor Beta

Hull HP 48,400, distributed across 5 hull zones, each with its own plate thicknesses, saturation cap, and pen thresholds. HP caps are the exact in-game values, not estimated.

Bow & stern19 mm

Overmatched by 76+ AP guns across the bracket. Can’t reliably bow-tank; gets bow-citadelled and overpenned.

Belt / citadel229 mm

AP can citadel a flat broadside even at range. Stay angled and avoid showing the full side.

Farming13 mm

Superstructure and extremities take HE pens and AP overpens from nearly any gun: steady chip damage. Fire resistance 17%, fires burn 60s. Range-by-range in the Compare tool →

Section	Plates	HP cap	Threats	Tactic
Bow	19 mm primary (range 19–229 mm)	1,900 (4% of HP)	Overmatched by 283mm+ AP (Nassau, Von Der Tann)Angle bounces 203mm19 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)	19 mm primary (range 19–229 mm)	36,300 (75% of HP)	Overmatched by 283mm+ AP (Nassau, Von Der Tann)Angle bounces 203mm19 mm: HE pens from 127mm+	Largest HP pool. Citadel sits behind these plates; thinner deck and side plating absorb the rest.
Stern	30 mm primary (range 19–229 mm)	1,600 (3% of HP)	Overmatch not possible in its bracketAngle bounces 410mm30 mm: HE pens from 203mm+	Mirror of bow. Same fast saturation.
Citadel	229 mm primary (range 25–229 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	13 mm	1,200 (2% 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	24,200 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 (152 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.
Rudder (module)	separate HP pool, does not drain ship HP	14,500 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.

Open in Charting Tool

Ship Charts

Exteriors

Skins & permanent camouflages

Every custom exterior Rio de Janeiro can equip, from in-game data.

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.

2024-08-01 · Patch notes Anniversary Update: Champion's Journey Patch notes 2025-11-27 · Patch notes Holiday Update: Christmas on the Waves Patch notes 2026-03-26 · Patch notes April Update: Victorious in Metal Patch notes 2026-07-30 · Patch notes Anniversary Update: Tides of Adventure Patch notes

Rio de Janeiro

Rio de Janeiro Community Stats

Rio de Janeiro Community Stats

Playstyle

Overview

Positioning

Potato Avoidance

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How to get Rio de Janeiro

Builds

Cohort position

Peers in this cohort

Stats & specs

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Main battery formulas

AA defense

Secondary battery dispersion

Secondary battery firepower

Armor Beta

Ship Charts

Skins & permanent camouflages

Primary official WG sources

Signature Traits