Searches have continued today on foot, by boat, and by plane for missing persons Mr Kopua and Mrs Burling.
A drink bottle which may belong to Mrs Burling was located on the shore in between the two mouths of the Clutha river.
Police also downloaded information from a GPS device from the vessel which gave an indication of where the vessel may have capsized.
Both land and water searches will continue tomorrow.
ENDS
Released by Senior Sergeant Darryl Lennane, Southern Police.