THE QUEENSLAND CEMENT & LIME CO. LTD.

Kaione used Q6 in 1945–60 and Morib Q7 in 1953–67, apparently without flags. Seagoing vessels used Q5.

The device within the Q is a map of Queensland. Rosanoski’s account of The Log gives a green map and no lettering on the flag. A photograph of the first Cementco suggests coastal vessels may also have flown it. The second, seagoing Cementco had a narrow funnel top; much of the remaining fleet consisted of hoppers or barges without funnels.

The second Cementco was initially reported with letters between two black rings, without mention of the Queensland map. A photograph taken after the fitting of cargo cranes in 1990 shows Q5.

Brown 1995 gives QCL above Queensland, with a rough map inside the upper Q, all red-brown. Rosanoski questions the simplified colours and differing flag because The Log records no change, while allowing that they could relate to the 1988 renaming.