Detection system (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">detection system</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for radar that I've seen before include "System that detects and locates distant objects" , "Pulsed location-finder" , "beams" , "A help in locating" , "Locator of plane" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">detection system</span>' is the definition.<br/ ><span class="explanation-format__explanation">(sonar is a system that detects using sound waves)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sonar that I've seen before include "location device" , "Detection system at sea" , "Method of echolocation" , "Device for detecting objects used in arson" , "Underwater detection system" .)