OH2 is not only a campaign mod, please read its thread, it should contain pre-requisites and incompatibility notes for known mods, but be aware that a mod author CANNOT foresee and predict all compatibility between mods!
Here a 'Feature' extrac from the thread:
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FEATURES: - Mines, nets, icebergs, dolphins, buoys, whales. *
- Improved port defense in enemy harbor, Scapa Flow will get special attention.
- New (imported) ships. ** + Cerberus ship mods
- Reworked (and new) missions
- All missions requiring to hunt escorts and capital ships are modified or removed.
- A lot of important convoys will be added into the campaigns at their exact historical date.
- SH5 campaign extended up to 1945.
- New campaign covering the 43-44 timeframe.
- Reworked port traffic with buoys.
- Improved convoy traffic with ships from all nations, neutral ships.
- Better wolfpacks
- More varied secondary missions
- New terrain around Kiel and the canal ***
- Campaign radio messages (requires TDWs Ui or his Radio mod)
- New planes ****
- New Campaign "Monsun Gruppe"
- Japanese Ships, Villages, Planes, Church and Fishing Village#
- Over 30 new ports and 2 new U-boat bases
- Whales (There she blows)#
- Barrage Balloons
- New boat type IX (stats only) for use with Monsun Gruppe##
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Also TheDarkWraith's NewUIs (7_5_0...) add a lot of stuff, not just things for the GUI, read carefully also there. I don't understand why you use this mod at all. As good as it is, it's OLD STUFF not updated anymore. It changes so much from the stock game that instead you should simply install the TWoS mod, TWoS is an ALL-IN-ONE which does EVERYTHING possible - it does it without errors and it's UPDATED in regular fashion.