It was a destroyer, and what you said is what I was thinking, the contact was going fast. So does that mean this method won't work on fast moving contacts? I got the initial report, set my heading toward the contact (smoke on the horizon), set my speed to 10 kts, marked my point, and drew a 30km line. Waited 2 minutes, and placed the next mark, I forget the bearings given. As I stated though, the lines fanned out, and the terminiation point of the lines if a line was drawn from point to point would almost parallel the course of the contact. (recall I did have map contacts on).
Hope this helps.
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