Search is fundamental to the location of suspect devices that may need to be rendered safe. Search can also involve the location of hidden people or contraband such as drugs.
Search is a process, and with it comes the requirement for a range of specialist equipment. High risk search is under taken when counter terrorist intelligence indicates there is a high probability of a suspect device. Low risk search is carried out when an immediate threat has not been identified, but the systematic search of buildings, vehicles and events is carried out as both a deterrent and to ensure the safety of innocent people.