Rosanoski identifies the FOTW flag placed under E.B. Elsworth as Imperial Oil’s. Merchant Ships 1942 shows the livery under Imperial Oil Shipping while its funnel index names Imperial Oil. The FOTW rendering uses bright blue.
A photograph of Imperial Sarnia from the early 1980s confirms I87, including a black cowl. Ocean Ships and Marinart also give this funnel for the subsidiaries.
The National Maritime Museum flag is dated about 1951 and measures 1066.8 × 1778 mm. The FOTW museum-based version is dark blue; its comment contrasts Brown 1951’s thinner lettering and small-capital TD. The original note calls the image “I72”, retained in traceability.
Imperial Oil began at London, Ontario, in 1880 as Imperial Oil Co. Ltd., adopting Imperial Oil Ltd. in 1919. Accounts differ on Standard Oil’s control: the company history describes a majority-interest exchange for Canadian assets in 1887, while another reference dates control to 1898. International Petroleum was formed in 1914 for South American operations. Later subsidiaries included Caribbean Oil & Transport and Western Oil & Trading. The shipping business became associated with Esso Petroleum Canada, while Imperial continued as an integrated energy company under the Esso logo. The last vessel, Imperial Dartmouth, is recorded as deleted in 2003. Imperial became characteristic as the first part of ship names.
Canada, London, Ontario; Sarnia from 1912 and Toronto from 1916.
Keep the explicit scope label independent; no alias or company identity is inferred.