The Northern Territory Police Force hold concerns for the welfare of 89-year-old Roland.
Around 5pm on Monday 17 February, Roland's vehicle was located by a member of the public washed off the Stray Creek Crossing on Fleming Road, Douglas Daly.
He was not located him inside the vehicle or during searches conducted in the surrounding areas.
Around 10:30pm, Roland's son, who was in Darwin at the time, contacted police to report the incident.
Daly River Police attended to commence investigations, and the search was called off a short-time later due to weather conditions.
Search and Rescue Section deployed early this morning with both land and air assets and investigations remain ongoing.
If anyone has any information on his whereabouts, please contact police on 131 444.
