pythos why don't you set your game to no map contacts
once you start turning off the player aids, you will have
a much better sim....if thats what working towards
at first your tonnage will go down , but you'll have to
work harder to sink ships.....check out these links
http://www.paulwasserman.net/SHIII/#Step 9: Determine the Target’s Course (WM)
http://174.123.69.202/~subsimc/radio...o=file&id=1711
read the file called "Sonar_Tracking.pdf" in 2nd link