Looking for some tips for a glass bottom boat design

Sorry, not correct again.

All that is, is LRs structural reference for the extent of minimum thickness of bottom plating.
Nothing to do with the definition of hull side or hull bottom.

Since you missed out the references to it too:




As always, you're conflating two entirely separate issues.

 

As always, playing with words and half-finished texts. Everything is written so that everyone can draw their own conclusions. Nothing more to say, it's not worth it. Thank you, however, for your words, this time, even kind and without disqualifications.