One of the second generation of container ships built for Associated Container Transportation Ltd., an amalgamation of Ellerman (City Line), Cunard (Port Line) and Blue Star Line. Originally mix-manned with a mix of officers from the three companies, this was found not terribly satisfactory and they eventually reverted to single company staffing. 

Dick Young stood by at Vegesack for some time as Chief Officer, along with Chief Engineer Graham White before they were replaced before trials by Port Line personnel as this was the start of the split with Cunard. Also over in Vegesack was Ken Mitchell (Hull Inspector), Ron Wilson (Engine Inspector), Alfie Shand (Electrical Inspector) and George Angus (Refrigeration Inspector).

Operating on two basic routes, UK (Liverpool & Tilbury), the continent (Zee Brugge & Le Havre) to Australia and New Zealand via the Cape of Good Hope outbound and either through the Panama Canal or around Cape Horn back to Europe. The second route was from the eastern seaboard of America, from St. John (New Brunswick), Newark (New Jersey) , Norfolk, and Philadelphia, thence via Panama to Australia and New Zealand.
Australian ports of call included Melbourne, Sydney, Brisbane and occasionally Fremantle. Whereas  New Zealand ports called at were Wellington, Lyttelton, Port Chalmers and Auckland. Rotations varied with route and voyage.

Originally built with a modern high pressure steam plant, with Babcock ESD III Boilers, Stal Laval turbines and John Brown epicyclical reduction gears driving a six bladed propeller. Electrical power was supplied by two steam turbo-alternators and two Roll-Royce harbour sets. After the Fuel Crisis, it was no longer economical despite the many advantages and  reliability of a steam plant. She was re-engined in 1987 at I.H.I. of Yokohama with a Sulzer 8RTA62 diesel oil main engine producing 17,100 BHP along with diesel alternators.
All of the forward hatches, except No.1  & 2 were fitted out for under-deck refrigerated containers, cooled from a central plant supplied by J. W. Hall Ltd., Dartford, using brine as the secondary circuit. Additionally  self-contained (clip-on) units were carried above deck when it was found that demand for refrigerated capacity exceeded that available under-deck. Unlike her sister ships, she does not possess a crane forward.

In 1991 with the split up of ACT, the ACT 6 was transferred to the Blue Star Line fleet. The following photographs taken by Peter Stacey, show her transformation into the Queensland Star.

The Queensland Star continued in service  as one of the  last four remaining vessels to carry the Blue Star livery, all be it as part of the P&O Nedlloyd group. She  sailed on the15^th November 2002  from Wellington, N.Z., (shown below) on her last visit to that port. It was a sad day for Captain Peter Stacey, who has piloted her many times over the years into the Port of Wellington and  Captain Robert Morrison, the Master of the Queensland Star. 
She arrived on the 10/02/03  at Shanghai and was handed over to Chinese shipbreakers on the 13/02/03 for demolition.