1. RADAR OPERATION
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4. Roll the trackball (coarse adjustment) or wheel (fine adjustment) to align the
active variable range marker with the inner edge of the target of interest and
read its distance at the lower-right corner of the screen. Each VRM remains
at the same geographical distance when you operate the [RANGE] key. This
means that the apparent radius of the VRM ring changes in proportion to the
selected range scale.
5. Push the left button to anchor the VRM and fix its readout, or push the right
button to return the VRM to its previous location (range).
6. To erase a VRM, choose the appropriate VRM readout box and then push
the left button until the VRM disappears from the screen.