The British Mexican bunkering barges were uniform in size and were all built by Harland and Wolff Ltd., six at Belfast  and five at Govan. They were intended for port work and designed to carry 800 tons of fuel oil in three large tanks amidships. They were not self-propelled, but were equipped with a boiler and pumping machinery for the rapid  discharge of the oil. There was a tall funnel aft. Of those built at Belfast, four were towed across the Irish Sea to Southampton for the fuelling of liners, which were then converting to oil-burning in increasing numbers.

 

1928 Compagnie Venture-Weir SA, Algiers and became Francunion III  

 

Hulked for harbour use 1949.