frequency agility
... that modern radars use frequency agility to reduce the effects of intentional interference, or jamming?
... that modern <a href="./Radar" id="mwFZI" rel="mw:WikiLink" title="Radar">radars</a> use <b id="mwFZM"><a href="./Frequency_agility" id="mwFZQ" rel="mw:WikiLink" title="Frequency agility">frequency agility</a></b> to reduce the effects of <a class="mw-redirect" href="./Radar_jamming" id="mwFZU" rel="mw:WikiLink" title="Radar jamming">intentional interference</a>, or jamming?