<prompt> Bhala okuqhubekayo kwalesi sigaba - Phakathi nezinkinga, i-IRA yesikhashana yasebenzisa kakhulu ama-IED emkhankasweni wayo ka-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-elekthronikhi ezakhiwa ochwepheshe be-IRA zazingase zisetshenziselwe ukuqhuma ngokunembile ibhomu ngemva kwamasonto lifihliwe, okuyilokho okwenzeka ekuhlaselweni kwebhomu ehhotela laseBrighton  <response>: ngo-1984, futhi 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. 