I would expect that most nations are performing some kind of surveillance like this.
Finding people who serve on carriers shouldn't be difficult. That kind of information can be plastered anywhere over FB or similar. Many of their friends will also be active in similar roles.
Then find associated Strava accounts. Find more friends that way.
The information you can gather is useful on many fronts. Someone does a few runs a week on shore and then suddenly stops? Could be injury, could be that carrier has sailed. Have many of their "friends" who also serve there also stopped logging things on dry land? Do any of them accidentally log a run out in the open ocean? This kind of patchy unreliable information is the mainstay for old-school style espionage.
Strava Labs beta "Flybys" site used to be a great source for stalkers. You could upload a GPS track (which can easily be faked in terms of both location and timestamps) and see who was running/riding/etc nearby around that same time. The outcry was enough that it was switched to being opt-in (in 2020 I think) but for a while all of the data was laid bare for people to trawl and misuse.
Finding people who serve on carriers shouldn't be difficult. That kind of information can be plastered anywhere over FB or similar. Many of their friends will also be active in similar roles.
Then find associated Strava accounts. Find more friends that way.
The information you can gather is useful on many fronts. Someone does a few runs a week on shore and then suddenly stops? Could be injury, could be that carrier has sailed. Have many of their "friends" who also serve there also stopped logging things on dry land? Do any of them accidentally log a run out in the open ocean? This kind of patchy unreliable information is the mainstay for old-school style espionage.
Strava Labs beta "Flybys" site used to be a great source for stalkers. You could upload a GPS track (which can easily be faked in terms of both location and timestamps) and see who was running/riding/etc nearby around that same time. The outcry was enough that it was switched to being opt-in (in 2020 I think) but for a while all of the data was laid bare for people to trawl and misuse.