'StravaLeaks': France's aircraft carrier located in real time by Le Monde through fitness app

As the Charles de Gaulle and its strike group approach the Middle East, Le Monde identified a French sailor using the Strava fitness application in the Mediterranean Sea. This security flaw remains unaddressed despite our previous revelations.

Le Monde
Is an aircraft carrier's location supposed to be secret? Pretty hard to hide from a satellite I'd imagine.
Le Monde making use of what's actually available to them in real time—is the story here.