RIDLEY TUGS LTD.

Ridley adapted funnel colours to its principal contract. From about 1923 the final R320 version followed Bergen Shipping Co., Det Bergenske Dampskibsselskab, and continued until Tyne Tugs formed in 1959. The white bands’ spacing varied with funnel height; only Maximus shows equal black gaps, unlike Mitchell’s general depiction. Earlier Svenska Lloyd colours, referenced as S183, were used by Joseph Ridley and then the company until about 1939, apparently alongside the Bergen colours in the 1920s and 1930s. Tyne Tugs replaced the funnel colours after the charter transfer.

A black-and-white photograph of Impetus shows the flag. A late-1950s letterhead presents an apparent anomaly: a rarely seen flag on Impetus appears black with a white circle and black R, but the dark colours are inferred from monochrome material.