He uhi te rau (he wāhanga porowhita pakupaku kei runga ake i te wira) i runga i ngā waka motuka me ngā waka ehara i te waka, e ai ki te ingoa, e uhi ana i te anga o waho o ngā waka motuka me ngā waka ehara i te waka. E ai ki te nekehanga wai, ka whakaitihia te ātete hau, kia maeneene ake te haere o te waka.
Ka kiia hoki te papa rau he parepare (i tapaina mō te āhua me te tūranga o tēnei wāhanga o te tinana o te waka tawhito e rite ana ki te parirau manu). Kei waho o te tinana o te wira ngā pereti rau. Ko te mahi he whakaiti i te tauwehenga ātete hau e ai ki te kaha o te wai, kia pai ake ai te oma o te waka. E ai ki te tūranga tāutanga, ka taea te wehewehe ki te pereti rau o mua me te pereti rau o muri. Ka tāutahia te pereti rau o mua ki runga ake i te wira o mua. Nā te mea he mahi urungi tā te wira o mua, me whakarite kia tutuki te rohe mōrahi ina huri te wira o mua. Kāore he waku hurihuri o te wira i te rau o muri, engari mō ngā take aerodynamic, he paku piko te pereti o te rau o muri e puta mai ana ki waho.
Tuarua, ka taea e te papa rau o mua te whakahaere i te tukanga taraiwa o te motuka, te ārai i te onepū e takai ana i te wira, te paru e tauhiuhi ana ki raro o te waka, te whakaiti i te kino o te anga me te waikura. Nō reira, me ātete ngā rauemi e whakamahia ana ki te huarere me te pai o te tukatuka pokepoke. He mea hanga te parepare o mua o te nuinga o ngā motuka ki te rauemi kirihou me te ngāwari, kia pai ai te whakangāwari me te haumaru.
