On a different note; for those evenings when there is not enough time to load up a "Patrol", try this;
FBM 441117 USS Spadefish (SS-411) - Engagement of Convoy HI-81
Get into position fire your fish and batten down the hatches!
Thats all I am saying, enjoy!
Oh, this is with RSRDC plus TMO 1.5.2, nothing else needed.