Aircraft tracker

I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">aircraft tracker</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for radar that I've seen before include "Locator of plane" , "Radio device for tracking distant objects" , "Early warning system" , "System for locating distant objects" , "Electronic rangefinder" .)