He mahi ā te parepare hei tiaki haumaru, hei whakapaipai, hei whakapai ake hoki i ngā āhuatanga hauhautanga o te waka. Mai i te tirohanga haumaru, ka taea e te motuka te mahi hei ārai i te tukinga tere iti, hei tiaki i te tinana o mua me muri o te motuka; mēnā ka pā mai he aituā ki ngā kaihaerere, ka taea e ia te mahi hei tiaki i ngā kaihaerere. Mai i te āhua, he mea whakapaipai, ā, he wāhanga nui o te āhua whakapaipai o te motuka. I te wa ano, he pānga hauhautanga anō hoki tō ngā parepare motuka.
I taua wā anō, hei whakaiti i te kino ki ngā kainoho i roto i ngā aituā pānga taha, he maha ngā wā ka whakauruhia ngā ārai tatau ki ngā waka hei whakarei ake i te kaha ārai-tukituki o ngā tatau. He tikanga whai hua tēnei, he māmā noa iho, he iti noa ngā panoni ki te hanganga o te tinana, ā, kua whānuitia te whakamahinga. I te tau 1993 i te Whakaaturanga Motuka o Shenzhen, i whakatuwheratia he tatau waka hei whakaatu i te ārai kia kitea e te hunga mātakitaki, hei whakaatu i tōna mahi haumaru pai.
Ko te tāutanga o te parepare tatau he kurupae maitai kaha-kaha whakapae, he kurupae whakarara rānei hei whakauru i ia tatau o te pereti tatau, hei mahi i te parepare o mua o muri o te waka, kia "tiaki" ai te waka katoa, kia hanga he "taiepa rino", kia noho haumaru ai te tangata e noho ana i te waka. Ko te tikanga, mā te tāutanga o aua parepare tatau ka piki ake ētahi utu mō ngā kaihanga waka, engari mō ngā tāngata e noho ana i te waka, ka nui ake te haumaru me te noho haumaru.
