When laser hovercraft option is enabled and Laser Tank's electric engines option is disabled, the game fails to start with the following error:

Failed to load mod "Hovercrafts": __Hovercrafts__/data.lua:29: attempt to index field 'lcraft-recipe' (a nil value)
stack traceback:
        __Hovercrafts__/data.lua:29: in main chunk
   3.532 Loading mod core 0.0.0 (data.lua)
   3.657 Checksum for core: 3084595544
   3.684 Error ModManager.cpp:1741: Error in assignID: procession with name 'default-b' does not exist.

thanks for the report, should be fixed now