Police are investigating reports of debris located near the Murray Mouth this morning (Wednesday 23 September).

Just after 6.30am, police received a call from a local commercial fisherman after he had discovered a number of items of debris washed ashore several kilometres south-east from the Murray Mouth.

The debris appears consistent with items from the boat that is currently missing for the second time this month.

At 8.22am, SA Police reported that patrols and the police helicopter (PolAir) were making their way to the area to conduct a coastal search while a fixed wing aircraft was going to focus on searching open waters in the same area.

Just after 5am on Tuesday 22 September, police received a call from a man reporting his boat was taking on water near Granite Island. The boat is the same vessel that was the subject of an extensive search earlier this month south of Port Lincoln.

Sea Rescue volunteers conducted a search for several hours yesterday morning but were forced to return to shore as weather conditions worsened. PolAir also carried out a search along the Coorong and SAPOL's fixed wing aircraft also assisted in the search today.

Police received confirmed reports the vessel was seen anchored off Granite Island around 3pm Monday.

The Challenger aircraft provided by AMSA (Australian Maritime Safety Authority) searched the area until 11pm last night using infrared radar equipment. Debris located in the water around 4.30pm yesterday by the aircraft is being examined.

A coastal search resumed this morning at first light using PolAir and vehicles.

Anyone who has had contact with the man or saw the vessel after 3pm yesterday, is urged to call the Police Assistance Line immediately on 131 444.