Mr Bosch will be taught navigation by the stars and learn about swells and sea life, while mastering the demanding tasks of boat handling.
Waka Warriors director Anna Marbrook said the competition would make the trio push themselves. "We're going to see our rangatahi grow, both as individuals and as a team," she said.
Mr Bosch said he would adjust to the confines of the waka by "making friends and getting along with everyone".
"A lot of Maori kids should [get involved]. There's so many opportunities out there," said Mr Bosch.
The other competitors on Waka Warriors are Keanu Townsend (Ngati Whatua and Ngapuhi), and Rickylee Russell-Waipuka (Ngati Kahungunu and Raukawa).
Mr Townsend has family links to Northland, including his father who lives in Ruawai.
Waka Warriors will be on Maori Television, starting July 6 at 8pm.