Ko te tāutanga o te parepare o muri o te tatau he whakatakoto i ētahi kurupae maitai kaha-kaha ki roto i te panera tatau o ia tatau, kia whakapaea, kia tūpato rānei, hei parepare o mua, o muri hoki, kia "ārahi" ai te waka katoa e ngā parepare o muri i mua, i muri, i maui, i matau hoki, kia hanga he "taiepa parahi me te taiepa rino", kia nui ai te wāhi haumaru mō ngā pāhihi o te waka. Ko te tikanga, mā te tāutanga o tēnei momo parepare o muri o te tatau ka piki ake ētahi utu mō ngā kaihanga waka, engari mō ngā pāhihi waka, ka nui ake te haumaru me te wairua haumaru.