OWT classes meaning (for coastal water)

I am using OWT classification to define different water types for coastal water. The output is a raster map with numbered classes. What does each water type number means ? where can I find the description of each class ? Is it possible to group the water type classes in turbidity categories, like clean, moderate and turbid waters ?

The classes depend on the OWT type you select as parameter.
The types and classes are described in the help.
More about the algorithm can be found here: Remote Sensing | Free Full-Text | An Optical Classification Tool for Global Lake Waters (mdpi.com)
About the GLaSS classes you can read more here: GLaSS Deliverable 3.3 2014 - Optical pre-classification method (the current link in the help is not working anymore)