This is self paced MOSES Modeler training material. The material includes step by step instructions to make a weather station and a fish farm. Both of these vessels were featured in the Model It SIG (February 20210) and webinar (March 2021).
There are several ways to model these vessels. These are just one approach to modeling.
The instructions are presented as a list of steps. The theory behind the approach is not covered. Please see the user's manual for explanations about what the options represent.