Designing new units is time consuming indeed. It's not so simple as the "mobile" SAM vehicle prop you see on the iceberg (that was just me making use of an old obsolete asset I had laying around). Also note that in none of the screenshots I've shown so far is the full iceberg cover, this is actually the current and final task on my to-do list now that I have fixed/changed everything else that needed changing between test builds.
But yeah, no realism on this level, at least not in the sense of immersion. You can only expect so much in a game featuring unusual themes.
Despite not having a land route, I still believe this version of the level will play better than previous iterations.