When firing on enemy ships, keep in mind that the projectile does not reach immediately, so when making a sight, you need to make an appropriate correction and a slight correction to the wind. Shot you can sink the ship, get by or the bomb will explode near the ship, which will only stop it, but it will not sink. In this case, you have to spend one more charge to make a hole. In the game Battlegroup.io a little distracting moment is saved: the periscope can be closed by a cheerful captain, who can not get rid of. Such conditions, reduced visibility will have to act almost blindly, but for an experienced player this is not a hindrance.