The slipway, which took a year to build, was tested last Wednesday when the 800-ton motor patrol boat PGM 993 was hauled out of the water.
It is the first naval slipway to be built on the Andaman Sea cost.
Before it was completed, warships that required repairs had to be sailed around Singapore and north to the Sattahip Navy Base in the Gulf of Thailand, or – if that was not possible – would have to be dry-docked at a privately-owned boatyard in Phuket.