Full-time national serviceman Lance-Corporal (LCP) Muhammad Fahrurrazi Salim was first reported missing in the Temburong training area on August 12.
A team finally found his body at 2.55am on Aug 14 in the Sungai Batu Apoi river, Temburong, about 200m away from where he was first reported missing.
More than 250 troops from Singapore and Brunei were deployed to search for him. They were supported by 16 naval divers from both countries, along with nine SAF and four Royal Brunei Armed Forces (RBAF) boats.
Three Republic of Singapore Air Force (RSAF) Super Puma helicopters were also deployed.
LCP Fahrurrazi's body will be flown back today for a military funeral.
Minister for Defence Dr Ng Eng Hen has written a letter on behalf of Mindef and SAF to LCP Fahrurrazi's family expressing condolences for their loss.
LCP Fahrurrazi Salim, 20, was a coxswain on a boat which was part of a convoy of four vessels.
The boats were supposed to provide safety coverage for a water-crossing segment of a jungle-training exercise in the Temburong training area.
A proficient swimmer, LCP Fahrurrazi was last seen on his aluminium assault boat at about 8am.
The weather was clear and the water was calm when he went missing. He was the only one on the boat at the time and was wearing a life jacket.
Chief of Army Ravinder Singh flew to Brunei on Monday night to check on search operations.