Greenpeace is launching its new Rainbow Warrior ship this week with a public tour around New Zealand. This is the third vessel the activist organisation has used to patrol the seas and take direct non-violent action to expose environmental harm. Greenpeace campaign director Carmen Gravatt told dpa the ship uses cutting-edge technology to be as environmentally friendly as possible. "She sails primarily under wind power, and her 55-metre-high A-Frame mast system can carry far more sail than a conventional mast of the same size. This is the first time this design has been installed on a vessel of the Rainbow Warrior's size." The vessel is in Auckland on show and open to the public before sailing around the bottom of the South Island and back up to Wellington. She will be inviting the public on board at ports along the way.