<prompt> Qedela umusho olandelayo: Phakathi neZinkathazo, i-IRA Yesikhashana yasebenzisa kakhulu ama-IED emkhankasweni wayo wango-1969 kuya ku-1997. Basebenzisa iziqhumane zezimayini eziqhumisa izibhamu kanye namabhomu aqhutshwa ngesilawuli kude. Amalungu e-IRA athuthukisa futhi aphikisana namadivayisi namasu. Amabhomu e-IRA ayeseyinkimbinkimbi kakhulu, enezinto ezivimbela ukuphathwa njenge-mercury tilt switch noma ama-microswitch. Le mishini ibizoliqhuma ibhomu uma lithuthwa nganoma iyiphi indlela. Ngokuvamile, idivayisi yokuvikela ukuphepha eyayisetshenziswa kwakuyi-timer ye-Memopark, eyayihlomisa ibhomu kuze kube yimizuzu engama-60 ngemuva kokuthi ibekwe ngokugcwalisa isekethe kagesi enikeza amandla kudivayisi yokulwa nokuphatha. Ngokuya ngomklamo othize isib., i-boobytraped briefcase noma ibhomu lemoto isekethe kagesi elizimele linikeze amandla ku-timer evamile ebekwe isikhathi sokulibaziseka esihlosiwe, isb. imizuzu engama-40. Nokho, ezinye iziphazamiso ze - electronic ezakhiwa ochwepheshe be - IRA zazingase zisetshenziselwe ukuqhuma ngokunembile ibhomu ngemva kwamasonto lifihliwe, okuyilokho okwenzeka e -  <response>: Ukuqhuma kwebhomu ehhotela laseBrighton ngo-1984. Ekuqaleni, amabhomu ayeqhunyiswa nge-timer noma ngocingo olulula lokulawula. Kamuva, amabhomu ayengase aqhunyiswe ngokulawula umsakazo. Ekuqaleni, kwakusetshenziswa ama-servo alula avela ezindizeni ezilawulwa ngomsakazo ukuze kuvalwe isekethe kagesi futhi kunikezwe amandla i-detonator. Ngemva kokuba abaseBrithani sebesungule ama-jammer, ochwepheshe be - IRA baqala ukusebenzisa amadivayisi ayedinga ukulandelana kwamakhodi omsakazo ashukumisayo ukuze aqiniswe futhi aqhume. Lokhu kwakunzima kakhulu ukukwenza. 