I dont know if there are already mines in the game, but if not, a great idea could be a mine that is inactive untill a passing ship gets within a certain proximity of it, and it magnitises and latches to the ship and explodes. this would be really kewl if there was a feild of them, making it a deathtrap for passing ships. the fields could be placed in important routes making it easyer to manage ur fleet, thinking that the enemy wouldnt go there. you could also predict that the enemy could bluff and actually try to pass through it, and take them out. There could also be an anti-mine weapon, like a gun that fires into the field and blows up some of them to make a path through the field. or a dummy-ship with no weapons or armour that could fly through. there could also be a mine that only explodes when a certain number of ships come within range, making it ideal for taking out larger groups. the mines could be self propelled, with a one-way engine, or could be placed by a minelayer. wot do u think?