The captain of the Solomon Islands ship which sank last week says high swells caused the vessel's sinking.
All 49 people on board managed to get onto lifeboats and were rescued.
An investigation has been launched in why the Solfish 001 sank.
The acting director of the Maritime Rescue Co-ordination Centre, Brian Aonima says the captain has told him the weather turned bad on the journey to Temotu Province and the ship quickly took on water.
"During the time it was very rough in Temotu Province in the high seas. There was wind about 20 to 25 knots and the vessel could not manage the boat to get through the waves because of the high swells."
Brian Aonima says the vessel was full of cargo at the time of the sinking.