The ReCAAP reporting centre said the 3,200-dwt Srikandi 515 (built 2013) had been identified off Narathiwat province on 27 November.
The ship was heading to Gresik from Kalimantan with 3,100 tonnes of palm oil when it was seized off Indonesia on 9 October.
Thai authorities arrested eight Indonesians armed with knives and machetes on the vessel, which had been repainted so its name showed as Chong Li 2.
