In reality dlsa, the idea behind THEBERBSTER's mix of Webster's GFO mod was to help in having a compatible mix. It is best to use only the mods THEBERBSTER included. The Real Environment is nice, but you install the GFO patch for it after the environment mod. You would install MaxOptics after that. MaxOptics changes the view perspectives from the bridge, TBT & periscopes. As KM mentions, only use ONE deck gun mod. You do not need the Eye Patch mod for v1.5 of the game. Stop the Shouting is also not necessary, but is nice when your boat takes damage. It copies the "normal" voices into the "shouting" voices folders.
When you activate some of the other mods after your initial first few, you do have to look for the ones that alter the menu_1024_768.ini file, which is what controls what you "see" with all of the 2D environments in the boat. So once you load Webster's New Sonar View, you will most likely encounter warnings of that file being overwritten by some of the mods that follow. When that happens, you basically over-write the preceding mod, and lose its benefit - hence the idea of only using the mods that THEBERBSTER included, other than the sound and environment mods. You can use other mods, you just have to be careful of what they overwrite, as KM said. You will want to determine what is more important to keep. Slightly re-ordered:
1 Game Fixes Only Mod v1.1
3 Real Environment mod install
4 GFO Patch for Real Env
2 MaxOptics IV for GFO 1.1
8 Webster's Upgraded Deck Gun v2
11 Pacific Sound Mod
9 Webster's New sonar view for v1.5
... blah blah blah ...