Hi all. I'm new to the game and am having difficulty with the "Undefended Convoy Attack" battle. I find the 15 minute time limit is not enough. The battle used to have a 20 minute time limit, which would be much fairer. I've tried the scenario many times with different configurations and have had absolutely no success. I suggest putting the time limit back to 20 minutes unless someone here can give a hint as to how to win this battle. Thanks.