Ko te nuinga o te wā ka whakamahia ngā karāhe whakanui IR i roto i ngā tirohanga whānui o waho, ko te whāinga kia whakanuia te roa o te arotahi kia kitea ai ngā tawhiti tawhiti. Nā te mea ka taea te whakarerekē i te roa o te arotahi i te wā e whakamahia ana, ka taea te whakanui me te tirotiro i te wāhanga matua o te tirohanga, ā, ka pai ake te pūnaha aroturuki. I te whanaketanga tonu me te whakapainga o te umanga haumarutanga me ngā hanganga o waho, kei te whakamahia ngā karāhe whakanui i roto i ngā ahumahi me ngā mara maha pērā i ngā huarahi tere, ngā rēriwe me ngā piriti, te tirotiro takutai me te rohe, me te maha atu o ngā āhuatanga.
E 20 tau te roangaru e arotahi ana ki te whakarato i ngā hua whatu tino tika.