adherbal wrote:If a sub does not more or attack, it cannot be detected by sonar that turn.
Yeah, true in theory, but it doesn't actually work. A more exact description would be that it cannot be 'uncovered' by sonar, but it can sure as heck be attacked if you can find it another way.
In the instance I quoted above, moving a naval unit into the submarine's hex will 'detect it' automatically even though it neither moved nor fired. The unit that detects it can shoot at it just like normal. Your other destroyer units can also shoot at it by using the sonar function as normal and then launching depth charges like a normal shoot.
Intuitively you would think the 'going silent' by a submarine would prevent it from being found/shot no matter what, but the dev's probably thought about it this way:
1. It is not possible to have two units occupy the same hex
2. They've obviously chosen that a two-unit clash results in the submarine being discovered (so as to not confuse the player by moving you to the 'wrong' target hex with no reason)
3. Once the submarine is discovered, it is fair game
So there is some point in a 'wall-like' screen of destroyers doing a sweep for submarines if you can guess well
