Comment on French aircraft carrier Charles de Gaulle tracked via Strava activity in OPSEC failure

hesh@quokk.au ⁨3⁩ ⁨weeks⁩ ago

• eager_eagle@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

  that’s how it looks when you walk in circles in a vessel that’s moving

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  • Kapirotto@lemmy.ml ⁨3⁩ ⁨weeks⁩ ago

    I thought the same at first, but comparing to the map scale, I think that would mean the ship is crazy giant (like slightly bigger than the small loops in the track). If you compare that to the islands, it would mean the ship is bigger than many islands. I’m not sure why it’s zigzagging, but I would bet it’s something else…

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    • eager_eagle@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      you can’t compare it to the islands, because the GPS trace is an area within that green circle. You can only look at the 300m scale in the bottom right, which looks in the ballpark of an aircraft carrier to me

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  • partofthevoice@lemmy.zip ⁨3⁩ ⁨weeks⁩ ago

    Wow. Can you infer vessel speed by assuming the run always concluded at the start position? The bottom line doesn’t meet back at the top line because the ship and runner were going in opposite directions.

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    • eager_eagle@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      You don’t need that assumption. Your assumption can just be “the person and vessel don’t diverge significantly over time”.

      Then, if you treat velocity as a vector and compute the average velocity vector over time, you’ll have a pretty close estimation to the vessel’s velocity vector.

      After all, if those two average vectors (vessel’s and person’s) were to differ much, they would end up in different locations.

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• couldhavebeenyou@lemmy.zip ⁨3⁩ ⁨weeks⁩ ago

  He’s running up and down the deck

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