I'm trying to recall the name of a game I spent too much time playing on my ST. It was a simulation of cold war sub combat. It took place entirely on a map view, where you controlled NATO subs, including British and US I'm not sure if others as well. There was no "internal view" or anything like that, you pointed and clicked on the map to perform operations at a fleet level.
One key bit of gameplay I recall was when your US subs had SUBROCs on them and you'd launch and then wait for them to drop into the water right over the enemy while you sent your subs in the opposite direction.
It was not Red Storm Rising, 688 or any of the other "common" ones. Nor was it Harpoon, although it felt more like that that any of the others I can find.