An employee at asset management company Far North Holdings, based at Port Opua, said it had provided footage from its CCTV cameras to Maritime NZ and the police.
A salvage operation was carried out today to try to recover the dinghy, but was unsuccessful.
An investigation into the cause of the accident was continuing and a post-mortem examination was being carried, police said.
Kerikeri Sergeant Phil Le Comte yesterday said two men were on the yacht when the collision happened.
It was motoring up the Veronica channel in the Waikare inlet at Opua when the aluminium dinghy with an outboard appeared from its left side.
"So you've got one vessel going up the channel towards the Opua marina and then the other vessel comes from its left across its front, they collided, the male occupant of that dinghy is tossed into the water, [and] his dinghy sinks pretty much straight away.''
One of the men on the yacht dived in to help Mr Reti and he was pulled into another dinghy and brought to shore.
Mr Reti could not be resuscitated.
