Moves have been made by the Chief of Navy to shut down speculation about the loss of the Manawanui. 

The $100 million naval vessel was surveying the area off Samoa's coast on Saturday, when it hit a reef and sank the following day.  

Most of the 75 rescued crew members have returned to New Zealand, with the final few flying back today.  

Divers are heading out to the site today to assess the depth, the condition of the ship, and any presence of oil.  

Rear Admiral Garin Golding told Mike Hosking a Court of Inquiry's being set up to understand the facts, and speculation is unhelpful.  

He says they will do a number of interviews to get to the bottom of what went on, and in time, exactly what happened will be released. 

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