The Hudson Bay Flag is composed the English Red Cross but with quarters two, three, and four coloured navy blue. The canton is white but with a blue Canadian Leaf. This is a private bay for Canada only. It is the virtual opposite of the Gulf of Mexico.
Not to be confused with the Hudson Bay Corporation, this flag is for the body of water that composes the Hudson Bay. Navy blue represents the water while white - the ice flows of this area. The red cross indicates it was first documented by the English. The blue maple leaf should be obvious, as to why it is there...duh.
You could call Hudson the Gulf of Quebec? Likewise the Gulf of Mexico can also be though of as Dixie Bay?