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Petronas, together with MISC Bhd and Malaysia Marine Heavy Engineering (MMHE), has converted Tun Azizan, a cargo vessel, into a mobile sea base ship with the necessary features to function as a long-term national security asset following the incident of armed group invasion in Kg Tanduo, Lahad Datu, Sabah on 12 February 2013.
In November 2014, Petronas led an initiative jointly with MMHE and MISC to convert a used cargo vessel for the Royal Malaysian Navy's use as a mobile forward operating base in Sabah. These facilities are the first in Malaysia and Southeast Asia. It can accommodate a total of 99 crew members and is equipped with accommodation, food storage, washing room, operating and communication room, powerhouse, air conditioning system as well as military equipment and infrastructure. Tun Azizan is also equipped with light canon and grenade launchers such as those on the other Malaysian navy auxiliary ships, Bunga Mas Lima (BM5) and Bunga Mas Enam (BM6). All features and equipment have been fitted according to the technical requirements of the Malaysian Armed Forces (ATM).
The ship was constructed by Malaysian Marine and Heavy Engineering (MMHE) in Pasir Gudang, Johor and launched on 5 May 2015. She began operating as a Naval Base on 13 May 2015.