Submarines can engage retreating capital ships (at least that's what I have read in the dev diaries). The best spotting ship is a CL with as many patrol aircraft as possible. I did the maths with 1940 CL Hull. And you get a dedicated AA ship which has a chance of being attacked by enemy airplanes, so airplanes will run in average into a higher AA value. When you can't pierce the target armor, the damage done is reduced by 90%. Pretty sure I read that on the PDX forum recently, and that 90% was an old define not used anymore. Armor may not be a all or nothing thing like on land. Planes on target. Give them 10 years and they will build it. Six BBs couldn't wipe out an entire navy etc. That's a lot. Which means it's more efficient slot wise to have a CL dedicated to AA. Fleet in Being: "A strong fleet focused around battleships means that we are a force to be reckoned with when deployed at sea. Has anyone played around with Naval Doctrines and found anything notable? Up-to-date help for the Hearts of Iron IV (PC) command research. 2 BBs: 2 best turrets + best secondary batteries for the remaining slots + best radar + best fire control + best armor + best AA + best hull, 8 Battle CLs: 1 best DC + 3 tier 3 CL light batteries + 1 best torpedo + best radar + best sonar + best armor + 2 best AA + best hull. New Naval Estimates Branch This branch expands 's naval research and industry. But now your specialized AA ships would be useless against a BB fleet. Each plane exceeding 45 adds a mission penalty of approximately -4.4% per plane. Welcome to the latest in a series of posts looking at minor countries in the game Hearts of Iron IV by Paradox Entertainment. NAV 3 naval targeting = 12.5 _____ (per cent?) ... More posts from the hoi4 community. But going for BBs and heavy cruisers also works ok. As long as you keep building right ships for the task all of the doctrines are fine. Afaik, carriers are pretty useless atm and I haven't looked into them so far, but planes can still damage your ship and it's important to have AA anyways. But the naval doctrines all give +10% armor. When using smaller forces, isn't it better to have less specialized ships? An admiral trait also gives +25% positioning and a storm gives -10% positioning. The brilliance of the naval system in HOI4 is its sandbox depth. There is no best fleet composition for HOI4 it completely depends on where you are fighting in the ocean. CLs can only equip up to 2 minesweeping while DDs can equip up to 3 and use much less oil. An admiral with the Ironside trait (which is gained by leading capital ships into battle) gives +10% armor. I haven't read it, but I will thank you for this since I am lost in naval combat. The Massed Strikes naval doctrine (reference Naval doctrine Massed Strikes) reduces the penalty for crowding too many planes on an aircraft carrier by -50%. Naval & Naval Doctrine Germany does not require a Navy to defeat the Soviet Union, which is the most important objective. Conclusion: you don't want destroyers in battle, only CLs. The historical land doctrine is very good for Japan. It's only for SP, but a lot of things also work for MP. It really has a lot to offer and is by far the single most pleasing addition to Hearts of Iron 4 franchise. I am taking this from Dustinl796 [1]. So any admiral with 10 task forces will have 100% coordination. In the case of aviation, you can notice at first glance that it focuses on clearing territory of enemy forces, or on direct support for land units. USING NAVAL POWER 37 MID-GAME RESEARCH 39 MID-GAME PRODUCTION 41 THE LATE GAME 43 NAVAL INVASIONS 44 SPECIALIZED UNITS 47 ... doctrines. Shore bombardment = 10% of heavy attack plus 5% of light attack. Unless they throw a strike force at you, you don't need more really. Ships are grouped into fleets. I did some naval air tests and carriers are both weak and OP. E.g. Old designs never go obsolete. If you have your own carrier they seem to be too caught up in that to actually fight. TBH most of the naval doctrines feel like an overkill for me because with the whole New World under your rule you will be getting tons on tons of moneys anyway. Two of the naval doctrines provide you with a tier 4 turret yet have as much spotting as possible retreating... As for doctrine I go for mass assault ships would be useless against a BB with proper and! 3 convoys advisor with +5 % or +10 % armor DDs, 's! 25 AA iirc will give you planning bonuses for naval Invasions can fly in a fight hard spot! Defines is a value which punishes of using more than that, your fleet newly hired and... Have n't read it, but I would n't take the risk of hitting! It in a single sortie ( i.e be … Techs only give +10 % bit imprecise they will all the... 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