The search may be widened for the fuselage of a light plane that crashed into the ocean off Victoria's surf coast, killing all four people on board.
Despite an extensive search in Bass Strait off Point Lonsdale, the wreckage of the Piper Cherokee that plunged into the sea on Friday afternoon has not been found.
Three bodies were recovered from the crash scene within hours but a fourth victim remains missing.
Inspector Graham Banks of Geelong police says it's likely that body is trapped in the wreckage.
Police have not named the victims but it's believed they are Daniel Flinn, 55, Donald Hateley, 68, and Ian Chamberlain and his partner Dianne Bradley, both in their 60s.
The three men are all licensed private pilots, but it's not clear who was flying at the time of the crash.
The aircraft was flying from Moorabbin Airport in Melbourne to King Island in Tasmania.
Emergency crews were alerted about 12.30pm after a fisherman out at sea noticed the aircraft was in trouble and crashed into the water.
Inspector Banks said police divers and searchers using sonar equipment are searching an area 500 metres wide and 500 metres long, and believe the aircraft is resting in about 30 metres of water.
"(The search area) might grow if we don't find the plane in that location," he told reporters on Saturday.
Crews resumed their search at first light on Saturday after bringing in boatloads of plane wreckage and debris to shore on Friday night.
More debris from the aircraft washed up during Saturday.
Relatives of the victims have been notified, Mr Banks said.
"Obviously they are in shock and they're trying to process what has occurred," he said.
