[WIP 2026.1] U-Boat Expanded
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See the Change Notes here

Until I release UBE Version 1.0.0 , this mod is in a Work in Progress [WIP] state.
Features may be added, removed, changed during the mods development, It is a careful balance between figuring out what works and what doesn’t.
Hopefully, shortly (a few months) after Uboats final release. However, this does not mean that there wont be new "Expanded" Mods or new integration following release.
Feature List
Detailed Feature List
Npc Submarines and Player Missions based off real world historical uboat patrol data

News reports and BdU reports on real historical Events and Missions
New Skills which enable officers to have sailor followers
After acquiring skill you must use the following UI to add the sailor to the officer before it will show up on the Officer portrait
Uboat Expanded seeks to recreate a historically accurate representation of all the maritime activity during World War II using real data from http://www.uboat.net and http://www.convoyweb.org.uk/
Uboat Expanded combines the following mods into one workshop mod
Expanded Ports
Expanded Convoys and Shipping Lanes
Expanded Crew Names
Expanded Ship Names
Expanded Uboat Roster
Expanded Missions
Complete Kriegsmarine Grid System
Expanded Radio Messages
Not included:
Expanded Radio Messages Audio Addon
Partial Integration:
Historical Flags & Identification Book by ii
Not Integrated:
Wilhelmshaven Expanded (Not Considered due to bugs)
Fishing Expanded (Not Considered due to bugs)
Not Required but Highly Recommended:
to fill in missing functionality not provided by UBE or to compensate for UBE features.
[2024.1] BdU Convoys Reports
[2024.1] Historical Flags and Identification Booklet
(outdated) The UBE Essential Installation Guide [2023]
- Ensure that you enable Uboat Expanded in the game launcher after subscribing
- When using U-Boat Expanded, ensure to unsubscribe from the mods listed above, this will help performance and prevent unintended behavior
- You must start a new campaign for Uboat Expanded to work
- If you don’t want all the features enabled in Uboat Expanded, only subscribe to the submods listed, ensure you disable the Uboat Expanded mod when doing so.
UBE Compatibility List
If you find other mods that are incompatible with Uboat Expanded please report them here
It is no longer possible to utilize custom ports and all custom port campaigns have been removed.
See the Common Questions & Issues &Solutions
See the Bugs Thread
Please report bugs, Uboat Expanded Bug Reporting Form (Google Forms) [forms.gle]

Feel free to check out the Beta Branch of UBE – for testing only
I am always looking for feedback or potential contributors to this mod.
Many thanks to the following, as this mod was largely made possible from the information provided from the following resources:
Guðmundur Helgason’s https://www.uboat.net
Arnold Hague Convoy Database http://www.convoyweb.org.uk/
Support of my mod development for UBoat Patreon Support [www.patreon.com] and https://paypal.me/link4531
Additional Thanks
Freekoly
tr0mp
Mike
McDewgle
PIXIE
stosstrup
meckbreth
Emilkant
And numerous others for their Bug Reports, Support, and Feedback
Copyright 2020 SteamUser: Link. This item is not authorized for posting on Steam, except under the Steam accounts named: Link, ii
Required items:
Click the title to search on this site.
[2024.1] Community Patch — Steam Workshop
[2024.1] Historical Flags and Identification Booklet — Steam Workshop
[2024.1] Enhanced Identification Book — Steam Workshop
[2026.1] Shared Bundles for Entities — Steam Workshop
[2026.1] German Aircraft Bundle — Steam Workshop
[2026.1] Allied Aircraft Bundle — Steam Workshop
[2026.1] Ship-Bundle (Beta WIP) — Steam Workshop
[2024.1] Enhanced BdU Convoys Reports — Steam Workshop
Revisions:
Old revisions of this mod are available below. Click the link to download.