Searchers have so far been unable to find the two bodies still missing after the eruption on Whakaari/White Island.
The police national dive squad have searched the water around the island with no success.
Whakatāne man Phil van Dusschoten has taken part in marine search and rescue operations in the past, and is owner operator of the Diveworks fishing charter service, which regularly operates in the waters around White Island and Whale Island.
He speaks to Susie Ferguson.
