Esu-ai-tī no shigoto wa buji hitojichi o kaihō shi, hannin o kenkyo suru koto. Sono tame bōdan chokki o kite, sabumashin gan ya ōgata no kenjū o keikō suru nado jūbusō o shite iru no ga tokuchō da.The job of the SIT is to free hostages safely and arrest the perpetrator. One of their distinguishing features is that in order to do that, they equip themselves heavily, such as by wearing bulletproof vests and carrying submachine guns or large handguns.