Hoang Vo, 28, was rescued by troops yesterday after an air strike and artillery fire on an Abu Sayyaf camp in the island of Basilan dispersed the kidnappers, regional military spokeswoman Captain Jo-Ann Petinglay said.
She said the sailor was being treated for an unspecified wound on his back.
There is no way to independently verify the military's account of the rescue.
The Abu Sayyaf network has been kidnapping foreigners and locals for years and holding them for ransom on its remote island strongholds in the southern Philippines.
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A statement issued by the military's regional command based in the southern Philippine city of Zamboanga said Abu Sayyaf militants are holding a total of 26 hostages, including several foreigners, in Sulu and Basilan.
The Abu Sayyaf is known to behead its hostages unless ransom payments are made.
German national Jurgen Kantner, 70, was beheaded earlier this year after the kidnappers' demand for 30 million pesos (USD 600,000) was not met.
The Abu Sayyaf, originally a loose network of militants formed in the 1990s with seed money from Osama bin Laden's Al-Qaeda network, has splintered into factions, with some continuing to engage in banditry and kidnappings.
One faction led by Isnilon Hapilon has pledged allegiance to the Islamic State (IS) group, with members among those holding parts of Marawi, the largely Catholic nation's most important Islamic city, where the government has launched air strikes and deployed artillery and ground forces against them.
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