Better Mechanics : Logistical Capacity for Navies




Logistical Capacity for Navies is a total overhaul of how naval force limits work. Instead of using arbitrary hard caps or basic ship counts, this mod introduces a dynamic system that scales your capacity based on your actual industrial power and dockyard efficiency.

Vanilla HOI4 doesn’t account for the massive logistical strain of a global fleet. This isn’t a "hard limiter" that stops production; it’s an industrial simulation. If you want a massive navy, you need the industrial mobilization to back it up.
- Ship Weighting: We don’t just count hulls. When enabled, larger ships like Battleships or Carriers contribute more to your total load than simple screens.
- Industrial Scaling: Your capacity is driven by a weighted formula: (Dockyards * 10) + (Mils * 0.5) + (Civs * 0.5).
- Economic Mobilization Impact: Your logistical efficiency is tied to your Consumer Goods. A Civilian Economy will struggle to support a massive fleet, while a War Economy provides full logistical reach.
- Interactive UI: Includes a live GUI in the deployment and country views. Click the indicator to refresh your logistics status immediately!
- Multilingual Support: Now localized for Russian and Simplified-Chinese via LLM-assisted translations.
Customize how your navy scales using Game Rules. Each choice changes how penalties and bonuses are calculated:
- Absolute Distance: Logistics are based on the raw number of ships over or under the cap. A gap of 10 ships provides the same bonus regardless of country size.
- Saturation Percentage: Logistics are based on the percentage of capacity used. This allows smaller nations with a 0/10 fleet to receive the same maximum efficiency bonus as a superpower with a 0/200 fleet.
Choose the mathematical curve that best fits your playstyle:
- Linear (Consistent): Efficiency changes at a flat, constant rate. Every ship over your capacity adds the exact same penalty.
- Quadratic (Scaling): Penalties start small but accelerate rapidly as you exceed your capacity.
- Sigmoid (Balanced): Features a "soft" start for minor over-extensions, but scales sharply in the middle.
- Logarithmic (Early Impact): Early ships over the cap have a high impact on efficiency, but the penalty growth slows down significantly as your fleet continues to grow.
- Step Function (Milestones): Efficiency drops in sudden, large "steps" at specific milestones (e.g., crossing -1, -50, or -100 over cap).
- Hyperbolic (Critical): The "Death Spiral." Penalties are manageable until you approach a critical buffer, at which point logistics collapse entirely.
- Infrastructure Upkeep: Large industrial bases now face diminishing returns. Your total dockyard count creates a "Strain Factor" that dilutes your production bonuses, rewarding efficient "Tall" play over mindless dockyard spam.
- Ship Weighting Toggle: Choose between "Uniform" (1 Ship = 1 Cap) or "Weighted" (Hull-based) load calculations.
- Logistics Safety Clamp: Optional game rule to prevent naval production penalties from exceeding -100%, ensuring your shipyards never truly "die."
- No Buffs (Over-Capacity Focus): Removes all under-capacity bonuses and uncaps penalties. Includes a dockyard-based convoy trickle to prevent total economic death.
- Dynamic Tooltips: Hover over the indicator to see a full Fleet Breakdown, including the individual weight values of your Battleships, Carriers, and even modded units.
- Base Capacity: (Dockyards * 10) + (Mils * 0.5) + (Civ * 0.5)
- Weighted Values: Subs/DD (1.0), Cruisers (2.0), Battleships/Battlecruisers (4.0), Carriers (5.0)
- Refresh Rate: Monthly pulse, On Startup, or Manual Click
Modder’s Note: This system makes dockyards and total industry matter more than ever. Check the in-game tooltip for a full breakdown of your current industrial weights and mobilization efficiency!
We are centralizing our mod support to ensure bugs and suggestions are handled quickly. We rarely respond to Steam comments, so please join our communities below:
Better Mechanics Support:
For general collection feedback and technical support, join the Better Mechanics Discord Server[discord.gg].
Choo_Choo_Oreo’s Collection:
For specific requests regarding this mod and my other projects, join my Personal Discord Server[discord.gg].
If you enjoy the work and want to support future development:
🎖️ Support Me on Patreon[patreon.com], I post updates for my main mod here.
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Revisions:
Old revisions of this mod are available below. Click the link to download.