Navy serviceman Jason Chee has begun pool-based physiotherapy, the next milestone in his recovery from a horrific ship accident last December in which he lost both legs and his left arm.
The Republic of Singapore Navy revealed the news in a Facebook post, saying Military Expert (ME) 2 Chee had been pushing to swim faster, aided by a flotation device.
It said the development reflected his "determination and fighting spirit".
ME2 Chee added that he is now going through twice-daily therapy sessions to help strengthen his body and teach him to walk with his prosthetic legs.
"I'm adapting to my life very well and am able to live my life independently," he wrote. "Once I fully recover, the first thing I want to do is to go back to work as what my Navy friends are doing now."
The post attracted scores of well-wishes from netizens. "This guy is a legend," wrote Mr Benjamin Alexander Cai. "I hope that all servicemen or even all citizens can learn from him."
ME2 Chee was discharged from hospital in June, and began travelling by motorised wheelchair in July, when he also achieved his aim of walking a few steps on prosthetic legs.
His full rehabilitation, which aims for him to eventually walk without assistance, is expected to take years.
The Ministry of Defence has said his medical and rehabilitation expenses will be paid for in the long term.