I use single map contacts in a similar manner. But outside possible Luftwaffe coverage, I treat them like a Radio Direction contact (the purpose of the RDF loop).
I don't get speed or course info from that, so I'll just plot a course in the direction of the contact and run it down. If I happen to gain a visual contact from it, great. If not, oh well. I feel like it keeps the amount of single ship sinkings under control.
Just a thought.
T
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