For the radar contact, go to the PPI scope. Scale out to the max range (60kyds), and bring the range scale in as close as possible without losing the contact. You can "guesstimate" the range to the contact based on the max range on the selected scale, and whether the contact is 1/4, 1/2, etc, of the way from the center to the edge.
As you and the contact both move, you can update your map based on the PPI (which shows relative motion) to develop map contacts (which shows true motion).
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