Let me ask the Cobia guys about the sweep line and the contacts making arcs on the scope.
The USS batfish has the "newer" SS radar, as opposed to SJ radar. I remember seeing a range counter and I think it had a bearing counter, but I don't remember. I'll take pictures of the SS radar set when I get down there next month.
As for range, in game I usually pick up contacts that are out about 30 miles/~52,000 yards, even though the max range on the PPI scope is 80,000 yards.
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