U.K. · Tier VIII Submarine
Sturdy
Homing-torpedo submarine built around consumable uptime and dive-capacity management
Submarine Commander Skills — verified — 20 skills
Recommended role
Homing-torpedo submarine built around consumable uptime and dive-capacity management
Sturdy · Tier 8 Submarine · Balanced playstyle
- 1
Helmsman
1 ptEssential5 out of 5Sturdy repositions constantly around its Hydroacoustic Search cycle; sharper rudder and diving planes right after a use is the cheapest handling upgrade in the tree.
In game: For 15 s after using the Hydrophone: -10% rudder shift time and -10% diving plane shift time. · Unlocked from 1 total points.
- 2
Preventive Maintenance
2 ptsEssential5 out of 5A Tier VIII boat with a small HP pool cannot afford broken diving planes while a destroyer is closing.
In game: -30% risk of module incapacitation. · Unlocked from 3 total points.
- 3
Improved Battery Efficiency
4 ptsEssential5 out of 5Taken early — unusually so — because Sturdy's defining weakness is slow dive-capacity recharge, and a Tier VIII boat spends more time refilling than a Tier X one.
In game: While dive capacity is below 50%: +25% dive capacity recharge rate on the surface. · Unlocked from 7 total points.
- 4
Torpedo Aiming Master
4 ptsEssential5 out of 5Sturdy has access to acoustic homing torpedoes only, so bonus damage on a twice-pinged sector applies to literally every torpedo it fires.
In game: +15% homing torpedo damage against a twice-highlighted sonar-ping sector. · Unlocked from 11 total points.
- 5
Sonarman
3 ptsEssential5 out of 5Longer single-ping duration gives you time to line up the second ping; Sturdy's ping ranges are shorter than a Tier X boat's, so every second counts more.
In game: +25% duration of a once-highlighted ping sector; -15% duration of a twice-highlighted ping sector. · Unlocked from 14 total points.
- 6
Superintendent
3 ptsEssential5 out of 5Sturdy runs only three Damage Control Party charges and no Repair Party — an extra charge of everything, including Submarine Surveillance, is worth three points.
In game: +1 charge to all mounted consumables. · Unlocked from 17 total points.
- 7
Consumables Enhancements
2 ptsRecommended4 out of 5Longer action time on Submarine Surveillance and Hydroacoustic Search, extending the same consumable-led playstyle Superintendent supports.
In game: +5% action time of your ship's consumables. · Unlocked from 19 total points.
- 8
Liquidator
1 ptRecommended4 out of 5One point for more flooding from torpedo hits — pure profit on a torpedo-only ship, taken late here because the survival core comes first at this tier.
In game: +30% flooding chance (multiplicative) from your torpedo hits. · Unlocked from 20 total points.
- 9
Enhanced Sonar
1 ptRecommended4 out of 5The final point: when a Tier VIII boat is detected it needs its sonar back quickly to keep guiding fish while it runs.
In game: While your submarine is detected: -10% Sonar reload time. · Unlocked from 21 total points.
Class-based recommendation
Slot 1
Sonar Modification 1
Protects the sonar used to guide homing torpedoes.
Slot 2
Sonar Modification 2
Supports quicker target acquisition when pinging.
Slot 3
Dive Capacity Modification 1
Recharges dive capacity faster for more underwater time.
Slot 4
Submarine Steering Gears
Improves underwater handling when repositioning or escaping.
Slot 5
Reinforced Bulkheads
Reduces depth-charge damage when you are hunted.
Build complete — every recommended skill is already unlocked at 21 points.
- This is a no-reset path: every skill taken at an earlier milestone is still in the final 21-point build, so you never pay to redistribute points.
- Improved Battery Efficiency comes far earlier than on the Tier X boat, because slow recharge hurts much more when your torpedo range and ping range are shorter.
- Superintendent and Consumables Enhancements form a consumable block that Sturdy needs and the Tier X build skips: only three Damage Control Party charges and no Repair Party.
- Torpedo Aiming Master is the single largest damage skill available, because Sturdy fires acoustic homing torpedoes exclusively.
- Points are banked between 3 and 7 for Improved Battery Efficiency instead of buying filler the final build would not keep.
- Always aim for a double ping before launching — an unguided homing torpedo is a wasted reload.
- Treat dive capacity as ammunition: start the climb back to periscope depth before the bar is empty, not after.
- Use Submarine Surveillance to open an attack window on a stationary target rather than to sightsee.
- Stay away from destroyers and any ship holding depth charges; your HP pool does not survive a coordinated hunt.
- Ignore the deck gun — surfacing to use it against anything is how Tier VIII submarines die.
Ship class / skill tree
Submarine Commander Skills
Verified — 20 skills, 5 per row
Torpedo armament
Acoustic homing torpedoes only
Torpedo Aiming Master applies to every salvo
Dive capacity
High capacity, slow recharge
Wiki pros/cons — no invented figures
Consumables
Damage Control Party · Hydroacoustic Search · Submarine Surveillance
No Repair Party
Commander skill points
1 – 21
Progression milestones at 1/3/7/11/14/17/19/20/21
Final 21-point build
Helmsman 1 · Preventive Maintenance 2 · Improved Battery Efficiency 4 · Torpedo Aiming Master 4 · Sonarman 3 · Superintendent 3 · Consumables Enhancements 2 · Liquidator 1 · Enhanced Sonar 1
Unverified — Total 21 — curated prototype, not an official recommendation
Only values confirmed from the supplied sources are listed. Unverified numbers such as reload, detection, hit points, radar range/duration and torpedo range are deliberately omitted.
Skill data: Skill names, point costs and effects taken from the current World of Warships Wiki commander skill list (last edited 11 Aug 2026). The submarine tree is structurally different: 20 skills, 5 per point-cost row.
Build: Ship characteristics: current World of Warships Wiki Ship:Sturdy page (acoustic homing torpedoes only, high dive capacity with slow recharge, small HP pool, a minor deck gun, and a Damage Control Party / Hydroacoustic Search / Submarine Surveillance consumable set with no Repair Party). Skill mechanics: the verified Submarine commander skill catalog in this app. Progression: curated beginner-safe no-reset recommendation — not an official Wargaming build.
Enhanced Impulse Generator
3 ptsOptional2 out of 5Only active below 33% dive capacity — a state this build is specifically designed to spend less time in.
Priority Target
1 ptOptional2 out of 5Submerged and unaimed-at most of the match, so the counter usually reads zero.
Incoming Fire Alert
1 ptOptional2 out of 5Only relevant on the surface, and surfacing is a recharge chore rather than a fighting position.
Full skill table for Sturdy
Submarine Commander Skills — 20 skills, 5 per row
Laid out like the in-game tree for this class. Each row is one point cost.
- Enhanced SonarRecommended4 out of 5
- LiquidatorRecommended4 out of 5
- HelmsmanEssential5 out of 5
- Priority TargetOptional2 out of 5
- Incoming Fire AlertOptional2 out of 5
- Improved Battery CapacitySituational3 out of 5
- Torpedo Crew TrainingSituational3 out of 5
- Consumables EnhancementsRecommended4 out of 5
- Preventive MaintenanceEssential5 out of 5
- Last StandSituational3 out of 5
- Enhanced Impulse GeneratorOptional2 out of 5
- SonarmanEssential5 out of 5
- Consumables SpecialistSituational3 out of 5
- WatchfulSituational3 out of 5
- SuperintendentEssential5 out of 5
- Adrenaline RushSituational3 out of 5
- Torpedo Aiming MasterEssential5 out of 5
- Sonarman ExpertSituational3 out of 5
- Improved Battery EfficiencyEssential5 out of 5
- Enlarged Propeller ShaftSituational3 out of 5
Showing 20 of 20 submarine commander skills , rated for Sturdy.
Helmsman
1 ptEssential5 out of 5For 15 s after using the Hydrophone: -10% rudder shift time and -10% diving plane shift time.
Sturdy repositions constantly around its Hydroacoustic Search cycle; sharper rudder and diving planes right after a use is the cheapest handling upgrade in the tree.
Preventive Maintenance
2 ptsEssential5 out of 5-30% risk of module incapacitation.
Does not apply to secondary or AA batteries.
A Tier VIII boat with a small HP pool cannot afford broken diving planes while a destroyer is closing.
Sonarman
3 ptsEssential5 out of 5+25% duration of a once-highlighted ping sector; -15% duration of a twice-highlighted ping sector.
Longer single-ping duration gives you time to line up the second ping; Sturdy's ping ranges are shorter than a Tier X boat's, so every second counts more.
Superintendent
3 ptsEssential5 out of 5+1 charge to all mounted consumables.
Sturdy runs only three Damage Control Party charges and no Repair Party — an extra charge of everything, including Submarine Surveillance, is worth three points.
Torpedo Aiming Master
4 ptsEssential5 out of 5+15% homing torpedo damage against a twice-highlighted sonar-ping sector.
Only works with homing (acoustic) torpedoes.
Sturdy has access to acoustic homing torpedoes only, so bonus damage on a twice-pinged sector applies to literally every torpedo it fires.
Improved Battery Efficiency
4 ptsEssential5 out of 5While dive capacity is below 50%: +25% dive capacity recharge rate on the surface.
Taken early — unusually so — because Sturdy's defining weakness is slow dive-capacity recharge, and a Tier VIII boat spends more time refilling than a Tier X one.
Enhanced Sonar
1 ptRecommended4 out of 5While your submarine is detected: -10% Sonar reload time.
The final point: when a Tier VIII boat is detected it needs its sonar back quickly to keep guiding fish while it runs.
Liquidator
1 ptRecommended4 out of 5+30% flooding chance (multiplicative) from your torpedo hits.
One point for more flooding from torpedo hits — pure profit on a torpedo-only ship, taken late here because the survival core comes first at this tier.
Consumables Enhancements
2 ptsRecommended4 out of 5+5% action time of your ship's consumables.
Longer action time on Submarine Surveillance and Hydroacoustic Search, extending the same consumable-led playstyle Superintendent supports.
Improved Battery Capacity
2 ptsSituational3 out of 5+10% dive capacity; -20% dive capacity recharge rate while on the surface.
Sturdy already has high dive capacity, and the -20% surface recharge rate makes its actual weakness worse. Avoid unless you never surface.
Torpedo Crew Training
2 ptsSituational3 out of 5While your submarine is detected: -15% torpedo tube reload time.
Detection-gated: it only works while you are spotted, which is the state Sturdy tries hardest to avoid.
Last Stand
2 ptsSituational3 out of 5The engine and steering gears remain partially operational while incapacitated, so you keep moving and steering.
Genuinely good, but this build already covers module trouble with Preventive Maintenance and spends its two-point slot on consumable uptime instead.
Consumables Specialist
3 ptsSituational3 out of 5-15% preparation (reload) time of your ship's consumables.
Faster consumable reload; a reasonable swap for Consumables Enhancements depending on whether you want them back sooner or lasting longer.
Watchful
3 ptsSituational3 out of 5Displays an “in detection range” warning when your otherwise-undetected submarine is inside active Submarine Surveillance, Surveillance Radar or Hydroacoustic Search detection range.
Detection range depends on your current depth under the standard depth rules.
Warns you when you are inside Submarine Surveillance, Radar or Hydro range. Useful information, but three points is steep at this tier.
Adrenaline Rush
4 ptsSituational3 out of 5For each 1% of HP lost: -0.25% torpedo reload, -0.25% Sonar reload, -0.25% secondary battery reload and -0.25% main battery reload.
Strong at Tier X where fights last longer; at Tier VIII a damaged Sturdy is usually about to die rather than about to trade.
Sonarman Expert
4 ptsSituational3 out of 5If a sector was highlighted within 30 s of using the Hydrophone: +25% ping-effect duration on both once- and twice-highlighted sectors.
Excellent for a Hydrophone-cycling specialist, but it competes for the same four points as Improved Battery Efficiency, which fixes a real weakness.
Enlarged Propeller Shaft
4 ptsSituational3 out of 5While dive capacity is below 50%: +18% speed at the surface and at periscope depth.
Does not work at maximum depth.
Escape speed on the surface and at periscope depth — exactly where Sturdy is forced to sit while recharging, but four points is a lot for a partial fix.
Priority Target
1 ptOptional2 out of 5Shows the number of opponents currently aiming their main battery at your submarine.
Submerged and unaimed-at most of the match, so the counter usually reads zero.
Incoming Fire Alert
1 ptOptional2 out of 5Warns you about a main battery salvo fired at your ship from more than 4.5 km away.
Only relevant on the surface, and surfacing is a recharge chore rather than a fighting position.
Enhanced Impulse Generator
3 ptsOptional2 out of 5While dive capacity is below 33%: +15% sonar ping velocity.
Only active below 33% dive capacity — a state this build is specifically designed to spend less time in.