I made hatch boards version 3.0 recently.
The 1.0 iteration I made like raised panel doors. Great idea but I made the rails to thin to maximize the plexiglass and the small glue area didn't hold up to the abuse.
The 2.0 version I got the brilliant idea to just make a full piece of plexiglass and add some rails bonded to increase the thickness. My dad used to say "it was a good idea, but not a great idea". The plexiglass, not being recessed, got beat up fast and the expansion of the wood meant the rails got loose and only the mechanical fasteners held it together.
Version 3.0 pictures coming. An oval plexiglass window recessed into a mahogany hatch board, with an okume keeper similar to the way the cabin portlights were done. I will tell you, cutting accurately to a scribed line and then sanding/planing to a line takes time. And the accuracy isn't as great as the port windows Alan sent me years ago. At the time I bought a "kit" I thought I made a compromise. It was a great decision.
FTR, I saw Amos's sailing video recently on FB. It snowed here today, but another month or so.