HMCS Port Arthur was a Royal Canadian Navy revised Flower-class corvette which took part in convoy escort duties during the Second World War. She fought primarily in the Battle of the Atlantic. She was named for Port Arthur, Ontario.

HMCS Port Arthur was a Royal Canadian Navy revised Flower-class corvette 

 HMCS Port Arthur was a Royal Canadian Navy revised Flower-class corvette which took part in convoy escort duties during the Second World War. She fought primarily in the Battle of the Atlantic. She was named for Port Arthur, Ontario.

https://en.wikipedia.org/wiki/HMCS_Port_Arthur