I like the idea of using an industrial pc. Small sailboats experience a lot of vibration and sometimes violent bouncing, slamming, and heeling. Most things on a sailboat have been tossed around and flung onto the floor at some point, so it will have to be bolted down.
I don't know, maybe something like this?
KINGDEL Desktop Computer, Fanless PC, Intel i7 8th Gen CPU, 32GB DDR4 RAM, 1TB NVMe SSD, HD Port, VGA, 2xCOM RS232, W-11 Pro https://a.co/d/0eODy8RH