Two blasts of police whistles broke a minute's silence for two Australian federal officers who died in a plane crash in Indonesia 10 years ago.
Five Australians and 16 other people were killed when a Garuda Airlines plane overshot the runway and exploded in flames at Yogyakarta airport 10 years ago on Tuesday.
The five Australians had been travelling with Australia's then foreign minister Alexander Downer to the central Javanese city but Mr Downer was not on the plane.
About 100 federal police officers and family members gathered at the police memorial at Lake Burley Griffin to honour Commander Brice Steele and Sergeant Mark Scott.
Federal Police Commissioner Andrew Colvin told the service that no one ever goes to work thinking they won't come home.
He described Sergeant Scott as a "policeman's policeman," popular, tough and having a massive smile.
"His reputation preceded him," Mr Colvin said.
Sergeant Scott had also worked in Myanmar (Burma).
The ceremony was told Commander Steele was an articulate and humble leader who made everyone feel important.
"I always assumed that one day we would work for him," Mr Colvin said.
As well as Indonesia, he had served in Hong Kong and Beijing and spoke Mandarin and Cantonese.
Family members laid floral wreaths under the officers' names on the police honour wall.
Morgan Mellish, an Australian Financial Review journalist, also died in the crash.
His sister Caroline and her son Saxon, seven, watched the sunrise at Sydney's Bronte Beach, where the family spread the keen surfer's ashes.
"Bronte at sunrise is magical," Ms Mellish told AAP.
"It's about remembering that life goes on and when the sun rises it reminds you that every day is a new day and you have to be thankful for life."
Although her son never got to meet his uncle, they share a name connection - Saxon was one of Mr Mellish's middle names.
"When we go to Bronte, (Saxon) says we're going to see Uncle Morgan and when he goes swimming he says he's swimming with Uncle Morgan," she said.
The Department of Foreign Affairs and Trade headquarters in Canberra had a private ceremony in honour of diplomat Liz O'Neill and AusAid Indonesia head Allison Sudradjat.
Prime Minister Malcolm Turnbull is in Jakarta for the Indian Ocean Rim Association leaders summit.
He paid tribute to the crash victims and will lay a wreath at the Australian embassy in Jakarta.
