Perhaps Beta Test Naval War: Arctic Circle?
What is Naval War: Arctic Circle? Paradox reckon it's a "Real Time Strategy (RTS) game where the player battles enemy naval and aerial forces for power and ultimate world domination," and I believe them. Those of you for whom world domination, and also meticulous naval strategy, is of interest, might fancy some time trying it out in the beta test, which can be signed up for right here.
Naval War: Arctic Circle is out in "Q2" of next year, and there's a trailer in the icy depths below.