TMA - Range Rate and Target Zig

[Pisces]

Exactly, not in DW or in Subcommand.

Originally Posted by TopTorp's TMA manual

Range rate data is not provided in Sub Command. However, it greatly assists in making
inferences about target maneuvers, especially when combined with bearing difference data.

You can only see if the real bearings are left of right of the marks on the track, in other words the bearing error.

The only solution to get a fix on his track is hope he doesn't zig, but you make one or more zigs when he does not.

[EDIT]Or get him on DEMON and find his speed. Then set the speed in the TMA panel and minimise the bearing error by playing around with range and course.