Originally Posted by SnowLeopard

One does it with sonar. It's not radar, but it is a way to get a bearing on the other guy when he is over the horizon. Further, if one has two or more lines of bearing, does a running fix, then they could have a range, position, and perhaps a course.

Here's the catch: Iowas don't have sonar; Kirovs do, hull mounted and VDS.
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("Can you hear me now? Good!"--The Sprint Man, (wtte))