"guess that the easiest/most reasonable at-sea dislay is either with stowed nets, or just having lines over the side (which also means fewest number of people on deck, too).
That could simplify the lighting. Underway with no nets overboard, it would only be the one white masthead light, and the sidemarkers through the cabin walls, and a stern light."
All excellent info, Capn. What you noted above seems like the way to go. I think that will look cool and it will add a lot to the visual impact. Doing those lights should not be a problem at all.
However...the hard part remains that I still need a clearer mental picture of what makes sence for locations, (not general locations), what the housings might look like, and how they are mounted. I realize I am getting into to the weeds but I should try to make a minimal effort for what would make sence. At the extreme minimum I could slap on some chip LEDs and call it good. If I can garner more info on what the housings looked like, how and where they are mounted, I might fashion something closer to reality.
You mention the marker lights through the cabin walls. That is too general for my brain. I located some videos of the Ross Tiger and I struggle to see any sort of marker lights on the cabin. In one shot, maybe on an arm extending from the side. It's not clear enough to see if there is a light housing on it. I need to do more research.
Anyhow, we are much closer than before settling the lighting issue. For now, I have other things I can work on and I can circle back later if needed.
Btw. In one video I was able to freeze frame on a section of the ship that shows the circles I asked about. It was clear to me that light came through the small holes. So they are open. On the larger one, it looked like there were two smaller holes within the larger circle. So the entire circle was not opened up but two smaller circles within it. I need to capture it in my computer and take a closer look to make sure I see what I saw.
Here is a good video on the Ross Tiger.
https://youtu.be/-Or-euo84nI