🎯 The core idea
One ship wins naval combat right now: a destroyer with full light attack and torpedoes bolted on. Most "meta" multiplayer fleets are that single template copy-pasted until the dockyards run out. If you only take one thing from this page, build that destroyer and stop reading.
The rest of this exists because that template will be nerfed. Everything below — how battles resolve row by row, why screening efficiency is the only ratio that matters, which doctrines feed which hull — is the machinery that produced it. Learn the machinery and you build the next meta template yourself instead of waiting for someone to post it.
Do this first
- Get naval dominance the cheap way, not the expensive way. The single biggest dominance modifier is the hull, not what you bolt to it. A blank carrier with no modules is the most dominance per factory in the game. A naval dominance battlecruiser gives slightly less for much less IC. Neither ship ever enters a battle — they exist to sit on a patrol mission and generate a number.
- Fix screening before you fix damage. Three screens per capital, one capital per carrier. Below 100% screening efficiency, enemy torpedoes start reaching your capital ships, and a battleship dies to destroyers it never got to shoot at.
- Keep recon out of the main fleet. Surface detection is averaged across every ship in the task force. The meta destroyer has 38 surface detection and drags that average into the floor, so a separate five-ship recon fleet on patrol does more for you than any amount of radar on the death stack.
1. The ship designs
All of these come off the designer screens in the source video. The author keeps the exact slot-by-slot loadouts in a linked Google Doc rather than reading them out, so treat the notes below as the shape of each design and pull exact module tiers from your own tech level.
The meta destroyer as the author builds it: light attack 13.8, torpedo attack 43.2, production cost 2418.
Every hull on the list above, as it sits in one production queue.
Super heavy battleship is the exception to the cheap-armour rule — it runs super heavy armour and is worth building whenever you can, but it needs both the research and the special project first.
The super heavy battleship — the one ship that justifies expensive armour.
Every design, as the designer shows it
10:04 — the carrier. Deck 100, cost 12,290, and nothing bolted on that would slow it down.
11:15 — the ordinary battleship, anti-air 33.1. The frame at 10:34 that the narration lands on is actually the super heavy above, not this.
11:08 — the naval dominance battlecruiser from the opening advice: cheap hull, never fights, exists to hold a patrol.
11:42 — heavy cruiser, heavy attack 45.0, cost 7,254.
11:53 — the recon cruiser, submarine detection 33.0, cost 3,876. There is no separate offensive light cruiser in this run; the designer returns to this same hull later.
12:47 — escort destroyer: depth charges 67.0, detection 41.2.
12:32 — the roach. Cost 780 against the meta destroyer's 2,418, and no damage to speak of.
13:42 — submarine, torpedo attack 90.0, cost 1,344.
2. How a naval battle actually resolves
This is the part that makes every ratio below make sense.
8:03 — the Battle of the North Sea with the rows laid out: screens in front, capitals behind, support and carriers at the back.
Ships line up in rows: row 1 screens, row 2 capitals, row 3 support ships and carriers, with submarines underneath. Every gun can only reach the first line — except heavy guns, which reach the first two. That is the entire reason capitals are worth their cost, and the entire reason screens exist.
Torpedoes are the exception that breaks the wall. They penetrate the screening line when enemy screening efficiency drops, or through torpedo screen penetration modifiers. At 100% enemy screening efficiency with 10% torpedo screen penetration, 10% of your torpedoes still reach their capitals. Light attack kills screens, hard attack kills capitals, and piercing below enemy armour cuts your damage — exactly like land combat.
Naval bombers changed. They used to seek out the biggest ship on the map. They now "play fair" and hit the screening line first, like everything else. If your mental model of naval bombers is from an older patch, it is wrong.
| Ratio | Value | |
|---|---|---|
| Screens per capital | 3 | watch ↗ |
| Capitals per carrier | 1 | watch ↗ |
| Cost of the cheapest capital vs a destroyer | ~7× | watch ↗ |
| Submarine visibility penalty in shallow seas | 33% | watch ↗ |
| Rows a heavy gun can reach | 2 | watch ↗ |
Build past those ratios. Losses during a battle drop you below 100% screening efficiency, and that is the moment torpedoes start landing on your battleships.
3. Missions
- an admiral with 3 task forces can cover 3 sea zones · 1:20 ↗
- grants a % modifier to your patrol in every assigned zone, −5% efficiency per extra zone · 2:38 ↗
- for denying troops and resources · 4:07 ↗
Assign one zone to an admiral and every task force stacks there. Assign two and they split one per zone, rotating every few weeks. Each sea zone has its own dominance requirement and enemy ships present have to be contested — a single submarine is not going to patrol the Gulf of Mexico.
Strike force is usually the right home for capitals. Instead of patrolling and generating raw dominance, they hand your patrolling ships a percentage modifier that applies across every assigned zone, burn less fuel, and stay in port where nothing can kill them.
The video puts the naval invasion threshold at around 100 naval dominance in each of the two zones. A commenter reports the game demanding 350–375 for a single empty, uncontested zone. Check the number the game actually shows you on the invasion arrow before you plan around it.
4. Fleet composition
The best navy is your entire navy, in one task force. Once you death-stack, supply is the only thing still limiting you.
A worked multi-theatre composition, as narrated: 4 carriers : 8 battleships : 16 destroyers, ideally with super heavy battleships in the capital slots.
The composition editor on screen tells a slightly different story: it targets 4 carriers, 8 capitals and 40 destroyers — five screens per capital rather than three. Treat 3:1 as the floor and this as what the author actually builds toward.
- watch ship strength so you don't feed a super heavy battleship to a bad fight · 16:33 ↗
- 17:00 ↗
- cheap enough not to think about; add naval bombers over problem regions · 17:08 ↗
- optimise for efficiency first, then add hulls for damage · 17:35 ↗
Carrier overstacking has been removed. The old advice to run five carriers in a stack is dead — if you learned navy from a guide older than this patch, that is the first habit to drop.
5. Carrier planes
Aim for green air, then stop thinking about it. The rule of thumb is 50/50 naval bombers to fighters; once you hold green air shift toward more naval bombers, and if you are at red or yellow air shift toward fighters — ideally heavy fighters with the range to reach the fight.
Two things worth knowing that the plane designer will not tell you:
- Air defence only matters against enemy fighters. It does nothing against enemy air attack. If the enemy has no air superiority you can fly a stripped, zero-aluminium naval bomber with no armour at all.
- Carrier stances are, in the author's words, incredibly buggy. Defensive means planes only fly when the carrier itself is in a battle; aggressive means they keep working and will not come home to defend. The practical advice reduces to: set them aggressive.
- Supply shortage grounds carrier planes entirely — a full carrier with no supply is "a big bucket of steel".
6. Research, MIOs, doctrines, spirits
Research priorities
Smoke generators, damage control and fire control methods first — the author calls these "super important". Then the hull for whatever you are actually building, torpedo tech if you run submarines, basic depth charges, upper-tier tech for screens and lower-tier for heavy ships. Transports if you plan invasions, underway replenishment for range, snorkels for submarines. Mine warfare does not matter.
MIOs
| Hull | Take | |
|---|---|---|
| Submarines | Submarine Builders — fill 5 traits to unlock Coastal Battle Fleet, then swap everything into it | watch ↗ |
| Screens | Escort Ship Builders, focusing light attack and speed | watch ↗ |
| Battleships | Battle Line Ship Builders | watch ↗ |
| Carriers | Task Force Ship Builders | watch ↗ |
21:50 — the shipbuilder MIOs. The types are what the table above names; the organisations themselves are nation-specific, so in this German run they read Deutsche Werke, Deschimag, Germaniawerft and HDW.
Doctrines
Fleet in Being as the grand doctrine for a normal navy — it stays good even with carriers. Trade Interdiction only if submarine raiding is genuinely all you care about and dominance is not.
Then: Patrol Boats for screens — "no discussion", because it unlocks Selective Engagement. Naval Gunfire Support for capitals, almost always. Light Task Forces for carriers unless you are running a carrier-focused fleet, in which case Mass Carrier Fleet. For submarines, Long-Range Submarines if you have the special projects, otherwise Capital.
Spirits
Instilled Aggression, hands down. Under Naval Command take Selective Engagement first; Night Fighting and Rapid Concentration are both fine after it. Under Spirit of the Navy, Naval Refit Yards, Naval Reform and Fleet Interoperability are all defensible — which one is right depends on your doctrine.
24:00 — the Spirit of the Navy panel. Worth knowing that the doctrine tree itself is never shown filled in anywhere in the video, so the picks above come from the narration rather than from a visible build.
7. Special projects
- free clearly worth the slot
- setup depends on your fleet
- skip arrives too late to matter
8. Micro that is actually worth doing
| Action | How | |
|---|---|---|
| Send a fleet into an ongoing battle | select fleet, hold Ctrl, right-click | watch ↗ |
| Change home base | Ctrl + right-click a naval base | watch ↗ |
| Set where new ships spawn | production drop-off port, per ship | watch ↗ |
| Toggle underway replenishment | button on the task force | watch ↗ |
Setting the production drop-off port per ship is the one that quietly saves runs: without it, expensive ships trickle out of whichever dockyard finished them and sail into a war zone one at a time. Point them all at a safe haven and the fleet leaves together.
A naval headquarters gives fleet-wide modifiers if you build it and assign an admiral — but it costs about as much as a civilian factory, more if you already have one.
9. Two free things almost nobody takes
Pride of the Fleet. Designate one ship and it gets bonuses plus +5% war support. The downside is losing war support for 30 days if it sinks, so name something that is not going to die.
Coastal core state protection. Naval dominance in your own coastal regions gives up to 10% stability, distributed as (number of coastal states ÷ 10)% per state — 10 coastal states means 1% each, 5 means 2% each. It works in peacetime. The example given: Lithuania picks up the full 10% stability essentially free by putting two boats on patrol.
26:58 — the tooltip itself, reading +1.42% on this particular set of coastal states.
From the comments
- Sea zone type changes the answer. No submarines in Shallow Seas. In Deep Oceans screens take heavy penalties, so carriers get stronger and cruisers beat destroyers. In Archipelagos heavy ships are badly debuffed, torpedo cruisers shine, and mines lose their hit-chance penalty. The video never mentions region-type modifiers at all. — foxdavion6865
- The invasion dominance number is disputed. "I know it's meant to be 150, but the game asked me for 375 for a single empty uncontested zone." — kleinerprinz99
- Underway replenishment is expensive. It "uses an absurd number of convoys" on anything larger than a small navy. — montymechanizedmarines
- Triple depth charges on the escort destroyer may be wasted IC — a ship in battle attacks one target at a time, so anything past a one-shot kill on a submarine is overkill. — apoivre
- Multirole naval bombers instead of the 50/50 split — torpedo and machine guns on top, armour, self-sealing fuel tanks and ground radar below. More IC, but no dedicated fighter slots. Weakness: they struggle against land-based planes. — robertalaverdov8147
- Germany can skip screens entirely. A battlecruiser-only Germany reaches 90% screening with zero screens through focuses, doctrines and spirits — you may need one carrier to advance the doctrine path. — elbast0
- Naval AA may be close to useless against carrier planes. Naval bombers push agility so high that naval AA accuracy approaches zero — 45 agility on the current patch. — WalrusJones185
Two questions in the comments that never got a confirmed answer, both worth testing yourself:
- When should you refit an existing fleet, and which ships first? Asked directly, never answered.
- Do carrier naval bombers also hit screens first, and once screening efficiency drops, do they reach carriers or capitals? The video's "naval bombers play fair now" line leaves this ambiguous.
Sources
- "The Only HoI4 Navy Guide You'll Ever Need" — VijoPlays, YouTube, 3 August 2026. Published under the title "The Ultimate HoI4 Navy Guide | 2026".
- Ship loadouts are given slot-by-slot in a Google Doc linked from the video description rather than read out on camera. The designs above are the shape of each ship; pull exact module tiers from the doc or from your own tech level.
- Detail is transcribed from the video's auto-generated captions, so some proper nouns may be slightly misspelled — the method is right even where the spelling is not.
- The "from the comments" box collects points raised by viewers foxdavion6865, kleinerprinz99, montymechanizedmarines, apoivre, robertalaverdov8147, elbast0 and WalrusJones185 that are not in the video itself.
Heavily patch-dependent by the author's own admission — the framing of the whole video is that the meta destroyer will be nerfed. Carrier overstacking removal, naval bombers no longer targeting the largest ship, and buggy carrier stances are all called out as current-patch behaviour.
Frequently asked
What is the best ship design in HOI4 right now?
A destroyer with full light attack and torpedoes on top. It does the most damage to the enemy screening line, and most meta fleets are simply this one ship repeated. Everything else in a navy exists to support it.
How many screens do I need per capital ship?
Three screens per capital, and one capital per carrier for 100% screening efficiency. Build past the minimum — losses drop you below 100% mid-battle, and that is when torpedoes start reaching your capitals.
Should I split my fleet into task forces?
Only to cover different sea zones. For actually fighting, the death stack is still better — your whole navy in one task force. At that point supply is your only real limit.
Which naval doctrine should I take?
Fleet in Being as the grand doctrine for any normal navy. Then Patrol Boats for screens (it gives Selective Engagement), Naval Gunfire Support for capitals, Light Task Forces for carriers. Trade Interdiction only if you care exclusively about submarine raiding.
Do I even need a navy against the AI?
Barely. The video's own concession is that you can probably beat the AI by spamming torpedo destroyers and ignoring composition entirely. The ratios matter in multiplayer.
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