SS Bilis was the seventh ship of the seven B-class oil tankers.

They served Gaz de France for around 14 years, the B-class vessels were acquired and delivered to BST in December 1986.

Previously referred to as the G-class vessels chartered under Shell Tankers United Kingdom (STUK).

Four out of the seven BST vessels were manned by a fully Bruneian crew with the exception of senior management; a feat yet to be achieved but not impossible.

[1] All B-class vessels had an average cargo capacity of 75,000 m3 (470,000 bbl) and were certified with the 'Green Passport' for the safe carriage of all hazardous materials on board.