Before the dive the four men made a plan that allowed them 20 minutes' diving time at 30 metres, but Mr McLeod said his brother simply didn't check his gauge or heed warnings. "Twenty minutes goes very fast at that depth and he knows that but he was so excited and so keen on hunting crayfish that he forgot about the small stuff and didn't check his air. It's as simple as that."
Mr McLeod said he and Brett and their friend surfaced and got on to the boat. When Mark failed to surface after 32 minutes "it was too long" and they became worried, radioing for help.
The Coastguard and Fire Service, Westpac Auckland Air Ambulance and local charter services responded to the 1.15pm emergency call. Eventually Mark's body was found on the ocean floor.
Mr McLeod described his brother as a fun-loving, kind-hearted guy. "He lived on the edge all the time. He just pushed life's boundaries the whole way. He was a good man, though, a very easy man to love."
Mr McLeod said his brother was not married and did not have children, but that he lived for his family and friends.
The builder's labourer moved from Te Awamutu to Whitianga several years ago and was a competent diver with seven years' experience.
Mr McLeod said he would be cremated and his ashes spread at Whitianga.