Azure a Llewellyn Setter sejant Arget, supporting with his dexter paw a fouled anchor Or and charged on the shoulder with a maple leaf Gules.
(Glossary of Heraldic Terms)
The breed of dog refers to the ship's name, the anchor to the navy and the maple leaf to Canada.
Llewellyn was the lead ship in the Llewellyn class of minesweeper. Commissioned in August 1942, she wore pennant J278 until she was paid off in June 1946. She was later recommissioned in 1949, and served as a tender at Saint John. She wore pennant 141 until she was paid off in October 1951.
White and azure blue
Heligoland, 1914.
Badges Of The Canadian Navy by Arbuckle, J. Graeme. Halifax: Nimbus Publishing, 1987.