The T/S Kapitan Felix Oca was launched by NKK Corp. as MS SEIUN MARU on July 1968 at Yokohama, Japan.First owned by Inter Pacific Lines Co.,Ltd. of Japan and utilized as a training ship.
In 1997, AMOSUP acquired the training ship M.V. Seiun Maru from the Ministry of Transport of Japan. Delivered in Manila on Nov. 19, 1997 and placed under Philippine Flag with vessel name T/S KAPITAN FELIX OCA .
It was released by Bu.of Customs on Dec. 1997 free from taxes and duties under RA 6715. Also subsequently, issued a coastwise license.And an exemption from securing Certificate of Convenience by MARINA was granted on June 29, 2001 .
Designated as a Philippine Navy Affiliated Reserve Unit (PNARU) on 24 September 1999.