Posted: Sat Dec 02, 2006 8:58 am
Seekrieg 5. Use hidden movement for the subs on a separate map.
Try my rules, Seas of War.
They are free.
I have a system using a searching device.
http://www.panzer-war.com/new_technology.html
It has a few rough edges but can be modified for convoy attacks or even sub vs sub warfare.
http://www.panzer-war.com/Seas%20of%20W ... page1.html
After playing several sub and convoy games I find them boring and surface warfare is a lot more fun.