A Bay of Plenty iwi organisation's dive trip to the Astrolabe Reef - the site of the Rena wreck - has been delayed at the behest of the ship's owners and insurers.
Te Arawa ki Tai forum spokeswoman Pia Bennett said the group is angry that the dive tomorrow was cancelled despite gaining permission from the regional council.
However, Hugo Shanahan, a spokesman for owner Daina Shipping Company and insurer The Swedish Club, said safety concerns mean the dive component of the trip has been delayed, not cancelled altogether.
For the last two months the forum had worked with the salvors, Resolve Salvage & Fire, to plan the visit where iwi divers could assess the mauri or wellbeing of the reef for a cultural impacts assessment, Ms Bennett said.
That assessment might be used in any future potential Environment Court action if a resource consent was sought to leave part of the wrecked ship on the reef.