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Two flags photographed hanging from a ceiling have stitched, slightly rounded ends. P592 is white and triangular, with a relatively small red diamond near the hoist containing a white sans-serif P. P441 replaces it with a larger black diamond bordered red, again with a white sans-serif P. Their design-change date is unknown. Rosanoski suggests that their points may have been shortened to clear people passing beneath, since published sources from 1948 through 2000 show pointed pennants.

The funnel follows Mantadoc, whose white base is presumed to be superstructure, with a visible door. Stewart’s white pennant has a red diamond frame enclosing a red P. Rosanoski suspects that this follows an old website logo and may never have existed as a flag.

Ship photographs are too small to establish the diamond colours, though black and red seem present and favour P441. Labradoc shows a long-tailed pennant in August 1998. Paterson, Cartierdoc in May 1990 and Ontadoc in April 1998 initially appear to fly rectangles, but slight taper and a frayed fly, especially on Ontadoc, suggest pennants that have lost their tails.

Know Your Ships shows a narrow white fimbriation between the black inner diamond and red border. This may derive from Mantadoc’s logo on white superstructure. Another logo on the same vessel’s black hull adds an outer white border around the red. The websites also displayed differing logos, so these versions do not establish separate flag designs.