The zone that was awarded to France was unusual and in two parts: first, the boundary was set at an equidistant line between the French islands and the Canadian island of Newfoundland. Added to this was a 24 nautical mile bulge on the west of the islands. Lastly, a long north–south 188-nautical-mile (348 km) corridor south of the islands was awarded to France, presumably to allow France access to its EEZ (Exclusive Economic Zone) from international waters without having to pass through the Canadian EEZ.
Wikipedia
I also guessed EEZ access shenanigans !