For people with vanilla textures. Drop in your game Data folder and run TES4LODGen.

For people using this mod: https://tesall.ru/files/file/8107-repleys-korabley-ot-katkat74/
Extra steps required for correct installation in the readme file. TES4LODGen still required!

For people using Grumblepunk's "Shipyard" retexture (https://www.nexusmods.com/oblivion/mods/3192). Drop in your Data folder and run TES4LODGen.

For people playing with Better Cities (or Open Better Cities). Requires one of the main packages installed first. Drop in your game Data folder and run TES4LODGen.