Canadian St. Lawrence Seaway Corporations

The flag is white bearing in the centre a composite emblem, above a red maple leaf and at bottom a blue star separated by red-white-blue meandering stripes on which two black ships, of different types, sail towards the flag’s centre.

The symbolism is obvious – common Canadian and US interest in Great Lakes shipping – while the position of the national emblems simply indicates the geographical position of the two countries.

A flat image, accompanied by the name, is on the Oshawa Port Authority page:

Relevant information from greatlakes-seaway.com:

The St. Lawrence Seaway Management Corporation is a not-for-profit corporation responsible for the safe and efficient movement of marine traffic through the Canadian Seaway facilities, which consists of 13 of the 15 locks between Montreal and Lake Erie. The Corporation plays a pivotal role in ensuring that the waterway remains a safe and well-managed system, which it shares with its American counterpart, the Saint Lawrence Seaway Development Corporation.

The Corporation's mandate promotes efficiency and responsiveness to the needs of shipping interests, ports, marine agencies, and provincial and state jurisdictions.

Its head office is located at Cornwall, Ontario.
Jan Mertens, 22 September 2005

No house flag as such but hailing from the Great Lakes area nevertheless. On Boatnerd top row, third flag captioned as “Welland Canal.”

We find an explanation in the on-line book “The Flags of Canada” by Alistair B. Fraser, Chapter VII ‘Of Crowns, Councils, and Commissions’ [fra98].

Another major service offered to transportation in Canada is the St. Lawrence Seaway. The Authority places its 1962 logotype in white on a deep blue field (Note 9). The Seaway's main function, the lockage of ships, is represented by a ship in a lock all within a circle representing the Authority itself.

(Note 9) The St. Lawrence Seaway Authority symbol was created by Montréal artist and industrial designer, Gilles Robert. It was registered on June 6, 1962. [paraphrased by J. Mertens]

Jan Mertens, 25 September 2005