Understood. I just use the bearing info from AI and do the math myself. I use Kuikeuge's method to get a pretty good range and course estimates. For convoy, I usually do a very long range surface measure on one of the ships. That works very well for me, especially at night. I surface in, launch a spread and get out quickly. But the issue is in late war, staying on surface too long=suicide. To pick out a single target using hydrophone is very difficult. So this is where I need most help on. Perhaps, use a radio intercept?
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