Coding AI in BF1942 is very different to BF2. You only have 2D pathmaps in BF1942 no 3D navmeshes, that's the reason why bots in BF1942 bug out in houses/trenches and can't use submarines. Coding AI in BF1942 is very limited and afaik it's generally not possible to make a proper naval map with them so for Rheinuebung (I guess that's what you mean?) you're out of luck.