GamingDiver / WoWs Legends Ships / Júpiter

World of Warships: Legends ship guide

Júpiter

Also called: 朱庇特 Beta

Spain · Tier I · CL Cruiser · Tech Tree: Júpiter

Tutorial-tier shipLearn the fundamentals: movement, aim, shell travel, and reading the minimap.

Playstyle

Stay near your team; do not push ahead alone
Avoid: Sailing in a straight line

Key characteristics

Fast turret traverse120 mm HE gunsSlow

On this page

Community stats
Playstyle
How to get Júpiter
Builds
Cohort position
Stats and specs
Armor
Charts
Exteriors

Community Data

Júpiter Community Stats

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

Playstyle

Overview

Júpiter is a Tier I Spanish cruiser - a tutorial-tier ship. The kit is for learning basic mechanics: movement, aiming, shell travel time, gun rotation, and reading the minimap. Match impact comes from making fewer mistakes than the other Tier I players, not from gear advantages.

Positioning

Stay near your team; do not push ahead alone. At Tier I the goal is practicing the basics, so pick a teammate to follow and learn how to lead your shots while their ship is in your field of vision.

Potato Avoidance

Sailing in a straight line

Even Tier I players will lead a predictable target; learn to make small course changes between salvos to break enemy aim. This is the single highest-impact habit to build at this tier.

Signature Traits

Fast turret traverse ↗

10°/s turret traverse, best of T1 CAs. Tracks fast-rotating targets peers can't keep up with.

Slow for the class ↗

18.5 kt, bottom decile of T1 CAs. Hard to rotate flanks or disengage; commit positioning early.

Thin armor ↗

10 mm max plate, bottom quartile of T1 CAs. Citadel windows open against peer-tier guns. AP above 60 mm of caliber cannot arm on 10 mm at flat impact and overpenetrates for minimal damage; angling adds effective thickness and can push those same shells over the arming threshold, turning overpens into full penetrations; 152 mm AP and up overmatches it at any angle.

Acquisition

How to get Júpiter

Júpiter is available in the Júpiter branch of the Spain Tech Tree as an early line ship. Official source cards below may also show its temporary Early Access window before it became a normal Tech Tree unlock.

Early AccessOfficial WG line/source notes indicate a temporary Early Access window before normal acquisition.

Show Spain tech-tree branch diagram

Spain Tech Tree

Júpiter sits in the Júpiter branch. The highlighted path shows the local branch context inside the full Spain tree.

1 ships in highlighted branch · scroll to inspect all Spain lines.

SpainIIIIIIIVVVIVIIVIII★

Cruiser

Tier ★CastillaPSSC110 Tier VIIIAndalucíaPSSC109 Tier VIICataluñaPSSC108 Tier VIAsturiasPSSC107 Tier VBalearesPSSC106 Tier IVGaliciaPSSC105 Tier IIIAlmirante CerveraPSSC104 Tier IINavarraPSSC103 Tier IJúpiterPSSC101

Official WG availability sources

Spanish Wave: Early Access Cruisers, Calendar, and Collection Early Access Start: 2025-09-05 · End: 2025-10-01 Official early-access or tech-tree-line article. Tech-tree ships are temporary crate drops during Early Access, then move to the Tech Tree.

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.

Cohort position

Hide ▾

Where Júpiter sits among Tier I CAs (11 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%Rudder shift3.7 s (2/12) Top 10%Acceleration20.7 s (2/12) Top 10%Displacement2,600 t (2/12) Top 25%Hit points14,300 HP (4/12) Top 25%Stealth profile8.06 km / 4.84 km (3/12 / 4/12) Top 25%Smoke fire bloom2.92 km (4/12) Top 25%Turning circle340 m (3/12) Top 25%Traverse-to-turn ratio6.24 × (3/12) Top 25%Main battery reload4.5 s (4/12) Top 25%AA threat81 (4/12) Bottom 25%HE fire chance5% (10/11) Bottom 25%HE DPM45,333 (10/11) WorstMax speed18.5 kt (12/12) WorstMax armor10 mm (1 of 3 tied) WorstCitadel belt10 mm (1 of 3 tied) WorstDeck armor6 mm (1 of 3 tied)

See 9 mid-pack stats

Not standouts for Júpiter -- 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.

Main battery caliber120 mm(8/12) Main battery range10.29 km(5/12) Fires per minute2.67(5/11) Main dispersion92.1 m(8/12) HE velocity808 m/s(9/11) Engine power10,000 hp(9/12) Turn-speed retention29.4 hp/m(9/12) Power-to-weight3.85 hp/t(5/12) NormTurn speed retained81%(11 of 12 tied at this value)

Peers in this cohort

Compare Tier I Cruisers

Show all 11 peers

Stats & specs

Customize in the Build Tool →

Survivability

Hit Points14,300

Displacement2,600 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.

100.1 x 12.6 m

Armor range6–10 mm

Plate armor thicknesses6, 10 mm

Armor material/layer entries22

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.

Fire duration30 s

Fire damage

Each fire ticks 0.3% of max HP per second for the full 30 s, so one unattended fire burns 9% of the pool (1,287 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 0.25% of max HP per second for the 40 s duration, so one unattended flood costs 10% of the pool (1,430 HP on this ship). Verified against measured flood ticks in replay data.

0.25% 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.

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.

3,700

Steering gear HP

Durability of the steering gears. As this pool drops, hits are likelier to jam the rudder; unlike most modules the steering can be knocked out and repaired but is never permanently destroyed.

4,300

Repairable: penetration50%

Repairable: steering gear50%

Main Battery

ModuleArtillery: 120 mm/45 Vickers-Armstrong Mk.F

Mounts / barrels4 mounts / 4 barrels

Reload time4.5 s

Firing range (base)9.3 km

Firing range (top fire control)10.3 km

Turret traverse10 °/s

Turret armor6 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.

4x ±140°

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.

40° off bow / 40° off stern

See the firing-arcs diagram ↓

Shell Grouping (σ)2

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{10285}{30} \cdot \frac{8 - 0.5}{1000} + 0.5) \cdot 30 = 92.1 m

92.1 m at 10.3 km

Max Vert Disp

Vertical dispersion ellipse height at max range:

σ_{V} = σ_{H} \cdot radiusOnMax

= 92.1 \cdot 0.6 = 55.3 m

55.3 m at 10.3 km

Med Horiz Disp

50%-hit horizontal radius:

σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}

= 92.1 \cdot \frac{0.6}{2} = 27.6 m

27.6 m at 10.3 km

Med Vert Disp

50%-hit vertical radius:

σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}

= 55.3 \cdot \frac{0.6}{2} = 16.6 m

16.6 m at 10.3 km

Turret turn time

180 degrees / 10 deg/s traverse speed = 18 s.

18 s

Shells/min

4 broadside guns x 60 / 4.5 s base reload = 53.3.

53.3

HE shells

HE Damage850

HE Velocity808 m/s

Fire Chance5%

HE penetration

20 mm ≈ 120 mm caliber / 6 (standard HE penetration ratio).

20 mm

HE full-salvo alpha

850 HE damage x 4 broadside guns = 3,400.

3,400

HE DPM

3,400 HE full-salvo alpha x 60 / 4.5 s base reload = 45,333.

45,333

Fires/min

53.3 shells/min x 5% fire chance = 2.67.

2.67

AA Defense

AA mount points5

Maximum AA range

Longest-reaching family on the in-game AA card. Base AirDefense aura max range is 3 km; dual-purpose mount auras extend it.

3 km

76 mm/40 Ansaldo RM19162×1 76mm

20 mm/65 C/38 L/303×1 20mm

Guns76 mm/40 Ansaldo RM1916

Continuous DPS

Effective DPS: 3 raw aura damage × 3.5 × 0.9 hit probability = 9 - the same in-game units as the Close-range AA DPS headline.

Range3 km

Guns20 mm/65 C/38 L/30

Continuous DPS

Effective DPS: 9 raw aura damage × 3.5 × 0.85 hit probability = 27 - the same in-game units as the Close-range AA DPS headline.

Range2 km

Total DPS in Aura

Medium 9 + Near 27 = 36

See the AA layers diagram ↓

Maneuverability

Engine power10,000 hp

Maximum speed18.5 kt

Turning circle radius340 m

Rudder shift time3.7 s

Engine power-boost threshold7 kt

Engine spool-up time15.3 s

Reverse spool-up time7.7 s

Reverse speed

top speed / 4 + 4.9 = 18.5 / 4 + 4.9 = 9.5 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.

9.5 kt

Crash stop

Seconds from top speed to a dead stop after ordering full reverse: reverse power winds in over the reverse spool-up while water drag does most of the braking. 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.

20.4 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 kt

Acceleration 0-90%

Time to reach 90% of top speed (16.7 kt of 18.5 kt), from our in-house acceleration model.

20.7 s

Acceleration 0-99%

Time to reach 99% of top speed (18.3 kt of 18.5 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.

33 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{18.5 \cdot 0.5144}{340} = 1.60 ° / s

, so

ratio = \frac{ω_{turret}}{ω_{hull}} = \frac{10}{1.60} = 6.2 \times

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

6.2× slow

See the full acceleration curve ↓

Concealment

Detectability by sea8.06 km

Detectability by air4.84 km

Smoke firing penalty2.92 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.

10.29 km

Detect when firing (air)

Air detectability plus the gun-firing bloom (2.4 km, which tracks main-battery caliber x 0.020). Matches the in-game 'Detect Firing Air' value on every captured ship.

7.24 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.

10.06 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.

7.84 km

Guaranteed Detect2 km

✦

Consumables

Damage Control Party∞ charges · 60 s reload · 5 s active

Module options (1)

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

Fire controlUpgrade

Main battery range9,350 → 10,285 m

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)2

Max Horiz Disp92.1 m at 10.3 km

Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:  $σ_{H} = (\frac{R}{30} \cdot \frac{idealRadius - minRadius}{idealDistance} + minRadius) \cdot 30$   $= (\frac{10285}{30} \cdot \frac{8 - 0.5}{1000} + 0.5) \cdot 30 = 92.1 m$

Shell scatter width @ 5 km52.5 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 km90 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 Disp55.3 m at 10.3 km

Vertical dispersion ellipse height at max range: $σ_{V} = σ_{H} \cdot radiusOnMax$ $= 92.1 \cdot 0.6 = 55.3 m$

Shell scatter height @ 10 km53.5 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  $delim \cdot R_{m a x} = 0.5 \cdot 10285 = 5142$  m, and  $radiusOnMax = 0.6$  at 10285 m. Above the kink:  $k = 0.5 + (0.6 - 0.5) \cdot \frac{10000 - 5142}{10285 - 5142} = 0.5945$ , so  $σ_{V} = σ_{H} \cdot k = 90 \cdot 0.5945 = 53.5 m$ .

Med Horiz Disp27.6 m at 10.3 km

50%-hit horizontal radius: $σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}$ $= 92.1 \cdot \frac{0.6}{2} = 27.6 m$

Med Vert Disp16.6 m at 10.3 km

50%-hit vertical radius: $σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}$ $= 55.3 \cdot \frac{0.6}{2} = 16.6 m$

Dispersion familyCruiser Disp.

Standard cruiser dispersion baseline.

HE flight time @ 10 km8.6 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:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.3927 \cdot {0.12}^{2}}{8 \cdot 22.68} = 9.79 \times 10^{- 5}$ . That runs from a 808 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 penetration20 mm

20 mm ≈ 120 mm caliber / 6 (standard HE penetration ratio).

Broadside guns used for alpha4

All 4 barrels bear on the broadside.

Turret turn time18 s

180 degrees / 10 deg/s traverse speed = 18 s.

HE full-salvo alpha3,400

850 HE damage x 4 broadside guns = 3,400.

HE DPM45,333

3,400 HE full-salvo alpha x 60 / 4.5 s base reload = 45,333.

Shells/min53.3

4 broadside guns x 60 / 4.5 s base reload = 53.3.

Fires/min2.67

53.3 shells/min x 5% fire chance = 2.67.

AA defense

AA DPS at max range9

Only families that reach 3 km contribute at the outer edge of the AA bubble. In-game families: 76mm 40 2x1 -> 9 DPS @ 3 km; 20mm Flak 38 3x1 -> 27 DPS @ 2 km.

Maximum AA range3 km

Longest-reaching family on the in-game AA card. Base AirDefense aura max range is 3 km; dual-purpose mount auras extend it.

AA DPS layered by range9 DPS @ 3 km, 36 DPS @ 2 km

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-blank36

Sum of every family's average DPS, achievable only inside the closest-range family (2 km).

AA threat index81

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

Near aura range2 km

Armor Beta

Hull HP 14,300, 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 & stern6 mm

Overmatched by 60+ AP guns across the bracket. Can’t reliably bow-tank; gets bow-citadelled and overpenned.

Farming6 mm

Superstructure and extremities take HE pens and AP overpens from nearly any gun: steady chip damage. Fire resistance 0%, fires burn 30s. Range-by-range in the Compare tool →

Section	Plates	HP cap	Threats	Tactic
Bow	6 mm primary (range 6–10 mm)	800 (6% of HP)	Overmatched by 127mm+ AP (Farragut)6 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.
Stern	6 mm primary (range 6–10 mm)	1,600 (11% of HP)	Overmatched by 127mm+ AP (Farragut)6 mm: HE pens from 127mm+	Mirror of bow. Same fast saturation.
Citadel	10 mm primary (range 6–10 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	6 mm	2,000 (14% 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	3,700 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.
AA mount (76 mm mount)	separate HP pool, does not drain ship HP	200 per-mount HP	Destroyed at 0 HP	Per-mount HP for the heaviest AA on this ship. An AA mount destroyed at 0 HP stops shooting down planes for the rest of the battle; DCP does not repair destroyed mounts. HE shells specifically target AA mounts since the small-caliber HP pool falls fast.
Rudder (module)	separate HP pool, does not drain ship HP	4,300 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 Júpiter 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.

2025-09-05 · Early access / tech tree line Spanish Wave: Early Access Cruisers, Calendar, and Collection Line source 2025-09-04 · Patch notes September Update: The Valor Armada Patch notes 2025-10-02 · Patch notes Halloween Update: Misty Voyage Patch notes

Júpiter

Júpiter Community Stats

Júpiter Community Stats

Playstyle

Overview

Positioning

Potato Avoidance

Signature Traits →

How to get Júpiter

Builds

Cohort position

Peers in this cohort

Stats & specs

See all derived stats

Main battery formulas

AA defense

Armor Beta

Ship Charts

Skins & permanent camouflages

Primary official WG sources

Signature Traits